As filed with the Securities and Exchange Commission on January 13, 1998
                                                 Registration No. 333-_________

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             -----------------------
                                    FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                             -----------------------
                           IRON MOUNTAIN INCORPORATED
             (Exact name of registrant as specified in its charter)

    Delaware                         4226                        04-3107342
(State or other         (primary standard Industrial         (I.R.S. Employer
jurisdiction of         classification code number)      Identification Number)
incorporation or 
organization)
                               745 Atlantic Avenue
                           Boston, Massachusetts 02111
                                 (617) 357-4455
       (Address, including zip code, and telephone number, including area
               code, of registrant's principal executive offices)
                              ---------------------
                                C. Richard Reese
         Chairman of the Board of Directors and Chief Executive Officer
                           Iron Mountain Incorporated
                               745 Atlantic Avenue
                           Boston, Massachusetts 02111
                                 (617) 357-4455
      (Name, address, including zip code, telephone number, including area
                          code, of agent for service)
                              ---------------------
                                    Copy to:
                           Susan Forest Barrett, Esq.
                            Sullivan & Worcester LLP
                             One Post Office Square
                           Boston, Massachusetts 02109
                                 (617) 338-2800
                              ---------------------
         Approximate  date of commencement of proposed sale to the public:  From
time  to  time or at one  time  after  the  effective  date of the  Registration
Statement as determined by the Registrant.
         If the only securities  being registered on this Form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|
         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933, check the following box. |X|
         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the  Securities  Act,  check the following box and
list the Securities Act registration  statement number of the earlier  effective
registration statement for the same offering. |_| _____________
         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. |_| _____________
         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. |_|
                             -----------------------


                                                      CALCULATION OF REGISTRATION FEE
====================================================================================================================================
                                                                        Proposed Maximum    Proposed Maximum
                                                       Amount to         Offering Price    Aggregate Offering         Amount of
Title of Each Class of Securities to be Registered(1) be Registered      Per Unit(2)(3)        Price(4)(5)       Registration Fee(4)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                    
Debt Securities (6)  ...........................  
Guarantees of the Debt Securities  .............  
Preferred Stock, par value $.01 per share ......  
Depositary Shares Representing Preferred Stock..  
Common Stock, par value $.01 per share  ........
Warrants........................................
Total                                             $      350,000,000                      $      350,000,000    $     103,250 (8)
====================================================================================================================================
                                                                                                            (Footnotes on next page)

The Registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effective date until the Registrant  shall file
a further amendment which specifically  states that this Registration  Statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933 or  until  this  Registration  Statement  shall  become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.


<FN>
(1)      The Debt  Securities,  Guarantees,  Preferred  Stock,  Depositary  Shares,  Common Stock and/or Warrants covered hereby are
         collectively referred to as the "Offered  Securities".  The Offered Securities registered hereunder may be sold separately,
         together  or as units with  other  Offered  Securities  registered  hereunder.  Subject to  Footnote  (4),  there are being
         registered  hereunder  an  indeterminate  principal  amount of Offered  Securities  as may be sold from time to time by the
         Registrant.  This  Registration  Statement  also  covers  contracts  that may be issued by the  Registrant  under which the
         counterparty may be required to purchase Offered Securities. Such contracts would be issued with Offered Securities.  There
         are also being  registered  hereunder an  indeterminate  principal  amount of Offered  Securities  as may be issuable  upon
         conversion or exchange of Debt  Securities,  Preferred  Stock or Warrants or pursuant to antidilution  provisions  thereof.
         There are also being  registered an  indeterminate  principal amount of Guarantees of the Debt Securities by the Guarantors
         (as defined herein).

(2)      In U.S.  dollars or the equivalent  thereof in one or more foreign  currencies or currency  units or composite  currencies,
         including the European Currency Unit.

(3)      The proposed  maximum offering price per unit will be determined from time to time by the Registrant in connection with the
         issuance by the Registrant of the securities registered hereunder.

(4)      Estimated  solely for the  purpose of  calculating  the  registration  fee  pursuant to Rule  457(o).  In no event will the
         aggregate initial offering price of the Offered Securities issued under this Registration  Statement exceed $350,000,000 or
         the equivalent thereof in one or more foreign or composite currencies.

(5)      No separate  consideration  will be received  for (i) the  Guarantees,  (ii) Debt  Securities,  Guarantees,  Common  Stock,
         Preferred  Stock or Depositary  Shares that are issued upon  conversion of Debt  Securities,  Preferred Stock or Depositary
         Shares or (iii) Debt  Securities,  Guarantees,  Common Stock,  Preferred  Stock or  Depositary  Shares that are issued upon
         exercise of Warrants registered hereby.

(6)      If any such Debt  Securities  are issued at an original  issue  discount,  then the offering price shall be in such greater
         principal amount as shall result in an aggregate initial offering price of up to $350,000,000.

(7)      The aggregate  amount of Common Stock  registered  hereunder is limited to that which is  permissible  under Rule 415(a)(4)
         under the Securities Act of 1933, as amended.

(8)      Calculated pursuant to Rule 457(o) of the rules and regulations under the Securities Act of 1933, as amended.
</FN>




Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there by any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.

                              Subject to Completion
                  Preliminary Prospectus Dated January 13, 1998
PROSPECTUS
                                  $350,000,000
                           Iron Mountain Incorporated
              Debt Securities, Preferred Stock, Depositary Shares,
                            Common Stock and Warrants
                             ----------------------
     Iron Mountain Incorporated (the "Company" or "Iron Mountain") may from time
to time  offer  in one or  more  series  (i)  its  debt  securities  (the  "Debt
Securities"),  (ii) its shares of preferred stock, par value $.01 per share (the
"Preferred  Stock"),  (iii)  fractional  shares  of  the  Preferred  Stock  (the
"Depositary Shares"),  (iv) its shares of common stock, par value $.01 per share
(the "Common  Stock"),  or (v) warrants to purchase any of the above  securities
(the "Warrants"),  with an aggregate public offering price of up to $350,000,000
on  terms  to be  determined  at the  time of  offering.  The  Debt  Securities,
Preferred Stock,  Depositary  Shares,  Common Stock and Warrants may be offered,
separately or together,  in separate series, in amounts,  at prices and on terms
to be set forth in a supplement to this Prospectus (a "Prospectus Supplement").

     In connection with the Debt  Securities,  substantially  all of the present
and future  subsidiaries of Iron Mountain (the "Guarantors") may, on a joint and
several basis,  offer full and unconditional  guarantees  ("Guarantees") of Iron
Mountain's   obligations  under  the  Debt  Securities.   The  Debt  Securities,
Guarantees,  Preferred Stock,  Depository Shares,  Common Stock and Warrants are
collectively referred to as the "Offered Securities."

     The  specific  terms of the  Offered  Securities  in  respect of which this
Prospectus is being  delivered  will be set forth in the  applicable  Prospectus
Supplement  and  will  include,  where  applicable:  (i) in  the  case  of  Debt
Securities,  the specific title,  aggregate  principal  amount,  currency,  form
(which may be  registered  or bearer,  or  certificated  or global),  authorized
denominations,  maturity,  rate (or manner of  calculation  thereof) and time of
payment  of  interest,  terms for  redemption  at the  option of the  Company or
repayment at the option of the holder,  terms for sinking fund  payments,  terms
for conversion into Preferred Stock, Depositary Shares or Common Stock, terms of
subordination to other indebtedness of the Company,  terms of related Guarantees
(if any), terms of security or pledge of assets (if any), and any original issue
discount and any initial public  offering  price;  (ii) in the case of Preferred
Stock,  the  specific  title  and  stated  value,  any  dividend,   liquidation,
redemption, conversion, voting and other rights, and any initial public offering
price;  (iii)  in the  case of  Depositary  Shares,  the  fractional  shares  of
Preferred Stock represented by each Depositary Share, (iv) in the case of Common
Stock,  any offering price;  and (v) in the case of Warrants,  the securities to
which they relate, duration, offering price, exercise price and detachability.

     The applicable Prospectus  Supplement will also contain information,  where
applicable,  about  certain  United  States  federal  income tax  considerations
relating to, and any listing on a securities exchange of, the Offered Securities
covered  by  such  Prospectus  Supplement.   Any  statement  contained  in  this
Prospectus  will be deemed to be  modified  or  superseded  by any  inconsistent
statement contained in the accompanying Prospectus Supplement.

     The Common Stock is traded on the Nasdaq  National  Market System under the
symbol "IMTN."  Application will be made to list any shares of Common Stock sold
pursuant  to a  Prospectus  Supplement  on the Nasdaq  National  Market  System,
subject to official  notice of issuance.  Iron  Mountain has not yet  determined
whether any of the Debt Securities, Preferred Stock or Depository Shares offered
hereby  will be listed  on any  exchange  or  over-the-counter  market.  If Iron
Mountain decides to seek listing of any such Offered Securities,  the Prospectus
Supplement relating thereto will disclose such exchange or market.
                             ----------------------
     See  "RISK  FACTORS"  at page 1 for  certain  information  that  should  be
considered by prospective investors.

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
       THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COM-
        MISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
            ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                             ----------------------
     The Offered  Securities may be offered directly,  through agents designated
from time to time by the Company or to or through  underwriters  or dealers.  If
any  agents  or  underwriters  are  involved  in the sale of any of the  Offered
Securities,  their names, and any applicable  purchase price, fee, commission or
discount  arrangement  between  or among  them,  will be set  forth,  or will be
calculable  from  the  information  set  forth,  in an  accompanying  Prospectus
Supplement.  See  "Plan of  Distribution."  No  Offered  Securities  may be sold
without delivery of a Prospectus  Supplement  describing the method and terms of
the offering of such Offered Securities.
                             ----------------------


               The date of this Prospectus is _____________, 1998.

                                      (ii)


     No  person  has  been  authorized  to give any  information  or to make any
representations  other than those contained or incorporated by reference in this
Prospectus in connection  with the offer  contained in this  Prospectus  and, if
given or made, such  information or  representations  must not be relied upon as
having been  authorized by the Company or any  underwriters,  agents or dealers.
This Prospectus does not constitute an offer to sell or solicitation of an offer
to buy  securities in any  jurisdiction  to any person to whom it is unlawful to
make such offer or solicitation. Neither the delivery of this Prospectus nor any
sale made hereunder shall, under any  circumstances,  create an implication that
there has been no change in the  affairs  of the  Company  and its  subsidiaries
since the date hereof or the information  contained or incorporated by reference
herein is correct at any time subsequent to the date hereof.

                              AVAILABLE INFORMATION

     The Company has filed with the  Securities  and  Exchange  Commission  (the
"Commission")  in  Washington,  D.C.,  a  registration  statement  on  Form  S-3
(together with all exhibits, schedules and amendments thereto, the "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities Act"),
with respect to the Offered Securities. This Prospectus,  which is a part of the
Registration Statement, does not contain all of the information set forth in the
Registration Statement.  Statements in this Prospectus as to the contents of any
contract or other document are not  necessarily  complete,  and in each instance
reference is made to the copy of such  contract or other  documents  filed as an
exhibit to the  Registration  Statement,  each such statement being qualified in
all  respects by such  reference  and the exhibits and  schedules  thereto.  For
further information concerning the Company and the Offered Securities, reference
is made to the Registration Statement.  Copies of the Registration Statement may
be obtained from the Commission at its principal office in Washington, D.C. upon
payment of the prescribed fee.

     The Company is subject to the informational  requirements of the Securities
Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and, in  accordance
therewith,  files  reports  and  other  information  with  the  Commission.  The
Registration  Statement,  the exhibits and schedules  forming a part thereof and
the reports,  proxy statements and other  information  filed by the Company with
the  Commission  can be inspected  and copies  obtained at the public  reference
facilities maintained by the Commission at Judiciary Plaza, Room 1024, 450 Fifth
Street, N.W.,  Washington,  D.C. 20549, and at the following regional offices of
the Commission:  Chicago Regional  Office,  Suite 1400, 500 West Madison Street,
Chicago,  Illinois  60661-2511;  and New York Regional Office, Seven World Trade
Center,  New York,  New York 10048.  Copies of such  material can be obtained at
prescribed  rates from the Public  Reference  Section of the  Commission  at its
principal  office  at 450  Fifth  Street,  N.W.,  Washington,  D.C.  20549.  The
Commission  maintains  a World Wide Web site that  contains  reports,  proxy and
information  statements and other information regarding  registrants,  including
the Company,  that file electronically  with the Commission.  The address of the
site is  http://www.sec.gov.  In addition,  reports,  proxy statements and other
information  concerning  the Company may be  inspected  at the offices of Nasdaq
operations, 1735 K Street N.W., Washington, D.C. 20006.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The  following  documents,  which have been filed by Iron Mountain with the
Commission  (file  no.  0-27584)  pursuant  to  the  Exchange  Act,  are  hereby
incorporated  in  this  Prospectus  and  specifically  made  a  part  hereof  by
reference: (i) Annual Report on Form 10-K for the fiscal year ended December 31,
1996 (the "Annual Report"), (ii) Quarterly Reports on Form 10-Q for the quarters
ended March 31,  1997,  June 30, 1997 and  September  30,  1997,  (iii)  Current
Reports on Form 8-K dated June 25, 1997 (as amended August 26, 1997), October 1,
1997,  October  16, 1997 (as  amended  November  10,  1997),  October 30,  1997,
November  25, 1997 and January 13, 1998 and (iv) the  description  of the Common
Stock  contained  in the  Company's  Registration  Statement  on Form 8-A  dated
January 18,  1996.  In addition,  the  financial  information  contained in Iron
Mountain's  Registration  Statements on Form S-4 (i) file no.  333-24635,  filed
with the  Commission  on April 4,  1997,  as  amended on May 7, 1997 and May 13,
1997, as made  effective by the  Commission  on May 14, 1997,  and (ii) file no.
333-41715,

                                      (iii)

filed  with the  Commission  on  December  8,  1997,  as made  effective  by the
Commission  on  December  11,  1997 is  incorporated  herein by  reference.  All
documents filed by Iron Mountain  pursuant to Section 13(a),  13(c), 14 or 15(d)
of the Exchange Act subsequent to the date of the initial Registration Statement
and prior to the  effectiveness of the Registration  Statement and subsequent to
the date of this  Prospectus and prior to the termination of the offering of the
Offered  Securities  shall be deemed to be  incorporated  by reference  into the
Registration  Statement  and to be a part  hereof from the  respective  dates of
filing of any such documents.

     Any statement  contained herein or in a document  incorporated or deemed to
be incorporated herein by reference shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement  contained herein
(or in the applicable Prospectus Supplement), or in any other subsequently filed
document  that  also is or is  deemed to be  incorporated  herein by  reference,
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus.

     The Company hereby  undertakes to provide  without charge to each person to
whom this  Prospectus  is  delivered,  upon the written or oral  request of such
person, a copy of any and all of the information  that has been  incorporated by
reference  in this  Prospectus  (excluding  exhibits  unless such  exhibits  are
specifically incorporated by reference into the information that this Prospectus
incorporates).  Requests  for such  copies  should be made to the Company at its
principal executive offices, 745 Atlantic Avenue,  Boston,  Massachusetts 02111,
Attention:  John F. Kenny,  Jr.,  Executive Vice  President and Chief  Financial
Officer.

                                      (iv)

                                  RISK FACTORS

     Investors should carefully consider the following risk factors, in addition
to the  other  information  contained  in this  Prospectus  and  any  Prospectus
Supplement,  before  purchasing any of the Offered  Securities.  This Prospectus
sets forth or incorporates by reference  forward-looking  statements  within the
meaning of Section 27A of the Securities Act, such as those regarding the goals,
beliefs,  plans or current  expectations  of the Company and its  management and
other  statements  contained in this Prospectus  regarding  matters that are not
historical  facts.  Because such  forward-looking  statements  include risks and
uncertainties,  actual results may differ  materially from those expressed in or
implied by such  forward-looking  statements.  Factors  that could cause  actual
results to differ materially  include,  but are not limited to, the risk factors
set forth below and the matters set forth or  incorporated  by reference in this
Prospectus  generally and any Prospectus  Supplement.  The Company undertakes no
obligation   to  release   publicly  the  results  of  any  revisions  to  these
forward-looking  statements  that  may be  made  to  reflect  future  events  or
circumstances or to reflect unanticipated events.

Risks Associated with Acquisition Strategy

     Iron Mountain has pursued and intends to continue to pursue acquisitions of
records  management  and related  service  businesses  as a key component of its
growth strategy.  Certain risks are inherent in an acquisition strategy, such as
increasing  leverage  and debt  service  requirements  and  combining  disparate
company  cultures and facilities,  which could adversely  affect Iron Mountain's
operating results. The success of any completed  acquisition will depend in part
on Iron Mountain's ability to integrate effectively the acquired businesses into
Iron Mountain.  The process of integrating such acquired  businesses may involve
unforeseen   difficulties   and  may  require  a   disproportionate   amount  of
management's  attention and Iron Mountain's  financial and other  resources.  No
assurance can be given that additional suitable  acquisition  candidates will be
identified,   financed  and  purchased  on  acceptable  terms,  or  that  recent
acquisitions or future acquisitions, if completed, will be successful.

     In September,  1997 Iron Mountain  amended and restated its bank  facility,
dated as of September  30, 1996 among Iron  Mountain,  the lenders party thereto
and The Chase Manhattan Bank, as Administrative  Agent (the "Credit Agreement").
Under the terms of the Credit Agreement, acquisitions by Iron Mountain involving
in excess of (i) $65 million (other than the  acquisition  of Arcus Group,  Inc.
(the "Arcus  Acquisition") and the acquisition of HIMSCORP,  Inc.  ("HIMSCORP"))
for any one  acquisition  and (ii) $150 million in the aggregate or $100 million
in cash for 1998 or any subsequent  year require the approval of lenders holding
51% or more of the commitments under the Credit  Agreement.  No assurance can be
given that the  lenders  will  consent to any  acquisitions  that Iron  Mountain
proposes to make in excess of such limits.

     The size, timing and integration of possible future  acquisitions may cause
substantial  fluctuations  in operating  results  from quarter to quarter.  As a
result,  operating  results for any quarter may not be indicative of the results
that may be  achieved  for any  subsequent  fiscal  quarter or for a full fiscal
year.

Competition; Alternative Technologies

     Iron Mountain has one or more  competitors in all geographic areas where it
operates.  Iron  Mountain  believes that  competition  for customers is based on
price,  reputation  for  reliability,  quality of service and scope and scale of
technology,  and believes that it generally competes  effectively based on these
factors.  As a result of this competition,  the records management  industry has
for the past several years experienced  downward pricing  pressures.  While Iron
Mountain  believes  that this pricing  climate is  stabilizing,  there can be no
assurance that prices will not decline  further,  as competitors seek to gain or
preserve  market  share.  Should a further  downward  trend in pricing  occur or
continue for an extended period of time, it could have a material adverse effect
on Iron  Mountain's  results of  operations.  Iron  Mountain  also  competes for
acquisition candidates.  Some of Iron Mountain's competitors may possess greater
financial and other resources than Iron Mountain. If any such competitor were to
devote  additional  resources  to  the  records  management  business  and  such
acquisition candidates or to focus its strategy on Iron Mountain's markets, Iron
Mountain's results of operations could be adversely affected. In addition,  Iron
Mountain

faces competition from the internal document handling  capability of its current
and potential customers. There can be no assurance that these organizations will
outsource  more of their document  management  needs or that they will not bring
in-house some or all of the functions they currently outsource.

     The substantial majority of Iron Mountain's revenues have been derived from
the storage of paper documents and from related services.  Such storage requires
significant physical space. Alternative technologies for generating,  capturing,
managing,  transmitting  and storing  information  have been developed,  many of
which require  significantly  less space than paper. Such  technologies  include
computer media,  microforms,  audio/video  tape, film,  CD-ROM and optical disk.
None of these technologies has replaced paper as the principal means for storing
information. However, there can be no assurance that one or more non-paper-based
technologies  (whether  now  existing or developed in the future) may not in the
future reduce or supplant the use of paper as a preferred medium, which could in
turn adversely affect Iron Mountain's business.

Financial Leverage; Debt Service Requirements

      Iron Mountain is highly  leveraged due to the substantial  indebtedness it
has incurred primarily to finance  acquisitions and expand its operations.  Iron
Mountain  expects to continue to borrow under the Credit  Agreement and possible
future credit  arrangements in order to finance possible future acquisitions and
for general corporate purposes.

     The ability of Iron Mountain to repay its indebtedness  depends upon future
operating  performance,  which is  subject  to the  success  of Iron  Mountain's
business strategy,  prevailing economic conditions, levels of interest rates and
financial,  business and other factors, many of which are beyond Iron Mountain's
control.  The debt service  obligations  of Iron Mountain  could have  important
consequences,  including  the  following:  (i) the  ability of Iron  Mountain to
obtain  additional  financing for future  working  capital needs or for possible
future acquisitions or other purposes may be limited; (ii) a substantial portion
of Iron Mountain's cash flow from operations will be dedicated to the payment of
principal and interest on its indebtedness, thereby reducing funds available for
other purposes;  (iii) Iron Mountain may be more vulnerable to adverse  economic
conditions  than some of its  competitors and thus may be limited in its ability
to withstand  competitive  pressures;  and (iv) Iron Mountain may be more highly
leveraged than certain of its  competitors,  which may place it at a competitive
disadvantage.

     A  substantial  portion of Iron  Mountain's  cash flow from  operations  is
required for debt service. Management believes that cash flow from operations in
conjunction with borrowings from existing and possible future credit  facilities
will be sufficient for the foreseeable future to meet debt service  requirements
and to make possible  future  acquisitions  and capital  expenditures.  However,
there can be no assurance in this regard,  and Iron  Mountain's  leverage  could
make  it  vulnerable  to  a  downturn  in  the  operating   performance  of  its
subsidiaries, a downturn in economic conditions or, because borrowings under the
Credit Agreement bear interest at rates which  fluctuate,  increases in interest
rates on  borrowings  under  the  Credit  Agreement.  If such cash flow were not
sufficient to meet such debt service requirements or payments of principal, Iron
Mountain could be required to sell additional equity  securities,  refinance its
obligations or dispose of assets in order to make such scheduled payments. There
can be no  assurance  that Iron  Mountain  would be able to  effect  any of such
transactions or do so on favorable terms.

Casualty

     Iron Mountain currently  maintains and intends to continue to maintain,  to
the extent  such  insurance  is  available  on  commercially  reasonable  terms,
comprehensive  liability,  fire,  flood and earthquake  (where  appropriate) and
extended  coverage  insurance with respect to the properties that it now owns or
leases or that it may in the  future  own or lease,  with  customary  limits and
deductibles.  Certain types of loss,  however,  may not be fully  insurable on a
cost-effective  basis,  such as losses from  earthquakes,  or may be  altogether
uninsurable,  such as losses from riots.  Iron Mountain has in the past suffered
damages and losses from an earthquake  and a riot in  California,  which damages
and losses were substantially covered by insurance. In March 1997, Iron Mountain
experienced three fires, all of which authorities have determined were caused by
arson and which  resulted  in  extensive  damage to one and  destruction  of the
Company's other records  management  facility in South Brunswick  Township,  New
Jersey. Iron

                                        2

Mountain  has filed  several  insurance  claims  related to the South  Brunswick
fires,  including a significant claim under its business interruption  insurance
policy.  Some of the  Company's  customers  or  their  insurance  carriers  have
asserted  claims or filed  lawsuits as a consequence  of the  destruction  of or
damage to their  records due to the fires.  The Company is a defendant  in three
such lawsuits.  The outcome of these claims and proceedings cannot be predicted.
Based on its present assessment of the situation,  after consultation with legal
counsel,  management  does not  believe  that the  outcome  of these  claims and
lawsuits  will  have a  material  adverse  effect on Iron  Mountain's  financial
condition or results of  operations,  although there can be no assurance in this
regard.

     In the future,  should  uninsured  losses or damages  occur,  Iron Mountain
could lose both its investment in and anticipated profits and cash flow from the
affected property and may continue to be obligated on any leasehold obligations,
mortgage  indebtedness  or other  obligations  related  to such  property.  As a
result, any such loss could materially adversely affect Iron Mountain.

History of Losses; EBITDA Objective

     Iron Mountain has a history of experiencing net losses applicable to common
stockholders.  Such net losses are attributable in part to significant  non-cash
charges associated with Iron Mountain's pursuit of its growth strategy,  namely,
(i)  depreciation and  amortization  expenses  associated with expansion of Iron
Mountain's  storage  capacity and (ii)  goodwill  amortization  associated  with
acquisitions  accounted for under the purchase method.  In addition,  net income
applicable to common  stockholders has been negatively  affected by a charge for
accretion of a redeemable put warrant and, in 1996, by an  extraordinary  charge
related  to the early  retirement  of debt.  The put  warrant  was  redeemed  in
February 1996, upon completion of Iron Mountain's initial public offering.

     Iron  Mountain's  primary  financial  objective is to increase its earnings
before  interest,  taxes,  depreciation,  amortization and  extraordinary  items
("EBITDA"),  which  is a  source  of  funds  to  service  indebtedness  and  for
investment in continued internal growth and growth through acquisitions, and not
net income and net income applicable to common  stockholders.  Iron Mountain has
benefited  from  growth  in  EBITDA,  while  net  losses  applicable  to  common
stockholders  have  increased  over such period.  Based on its experience in the
records management industry,  Iron Mountain believes that EBITDA is an important
tool for measuring the performance of records  management  companies  (including
potential  acquisition  targets) in several areas, such as liquidity,  operating
performance  and  leverage.  In  addition,  lenders use EBITDA as a criterion in
evaluating  records  management   companies,   and  Iron  Mountain's   financing
agreements  contain  covenants in which EBITDA is used as a measure of financial
performance.  Other measures of Iron Mountain's financial  performance,  such as
net  income  and  net  income  applicable  to  common  stockholders,  have  been
negatively  affected by pursuit of Iron Mountain's  objective to increase EBITDA
and may be  negatively  affected in the future.  In addition,  execution of Iron
Mountain's  growth  strategy  could result in future net losses due to increased
interest  expense  associated  with  borrowings  under the Credit  Agreement and
possible future credit arrangements and increased  depreciation and amortization
expenses.

Anti-Takeover  Effect of Certain  Provisions of Iron  Mountain's  Certificate of
Incorporation, By-Laws and the Notes Indentures

     Certain provisions of Iron Mountain's  Amended and Restated  Certificate of
Incorporation  (the "Restated  Certificate")  and Iron  Mountain's  By-Laws (the
"By-Laws")  could have the effect of making it more  difficult for a third party
to acquire,  or  discouraging  a third party from  acquiring,  a majority of the
outstanding  capital stock of Iron Mountain and could make it more  difficult to
consummate certain types of transactions involving an actual or potential change
in control of Iron  Mountain,  such as a merger,  tender offer or proxy contest.
The Restated Certificate also provides for three classes of Directors,  as equal
in number as possible,  to be elected on a staggered basis (one class per year).
As a  result  of such a  provision,  it would  generally  require  at least  two
elections of the Iron Mountain Board to replace a majority of the members of the
Iron  Mountain  Board,   thereby  enabling   existing   management  to  exercise
significant control over Iron Mountain's affairs during such period. Pursuant to
the Restated Certificate,  shares of Preferred Stock may be issued in the future
without further  stockholder  approval and upon such terms and  conditions,  and
having such rights,  privileges and preferences (including the right to vote and
the right to convert into Common

                                        3

Stock),  as the Iron  Mountain  Board may  determine.  Pursuant to the  By-Laws,
approximately  4 million  shares of Common Stock that were issued by the Company
in five acquisitions are subject to restrictions on transfer for varying periods
of time,  all of which  expire by January  1999. A  significant  portion of such
shares are held by affiliates.

     Iron Mountain currently has outstanding $165,000,000 in aggregate principal
amount of 10 1/8% Senior Subordinated Notes due 2006 issued in October 1996 (the
"1996 Notes") and  $250,000,000 in aggregate  principal  amount of 8 3/4% Senior
Subordinated  Notes due 2009  issued in  October  1997 (the  "1997  Notes,"  and
collectively  with the 1996  Notes,  the  "Senior  Subordinated  Notes").  Under
certain  circumstances  relating  to a change of  control  of Iron  Mountain  (a
"Change of Control") as set forth in the indentures for the Senior  Subordinated
Notes (the "Notes Indentures"),  Iron Mountain will be required to make an offer
to  purchase  all of the  outstanding  Senior  Subordinated  Notes at a purchase
price, in cash,  equal to 101% of the principal  amount thereof plus accrued and
unpaid interest, if any, to the date of purchase. There can be no assurance that
Iron Mountain  would be able to obtain such funds  through a refinancing  of the
Senior  Subordinated  Notes to be purchased or  otherwise,  or that the purchase
would be permitted under the Credit  Agreement.  Also, the requirement that Iron
Mountain  make an offer to purchase  all of the Senior  Subordinated  Notes then
outstanding in the event of a Change of Control may have the effect of deterring
a third party from  effecting a  transaction  that would  constitute a Change of
Control.

Control by Principal Stockholders

     The voting power held by certain  large  stockholders  of Iron Mountain may
have the effect of  discouraging  certain  types of  transactions  involving  an
actual or potential change of control of Iron Mountain,  including  transactions
in which the holders of Common Stock might otherwise receive a premium for their
shares over then-current market prices. In addition,  as a result of such voting
power such stockholders have the ability to significantly affect the election of
Directors of Iron Mountain who, in turn,  control the  management and affairs of
Iron Mountain.

Restrictions  Imposed by Terms of  Indebtedness;  Dependence  Upon Operations of
Subsidiaries

     The Credit Agreement and the Notes Indentures contain covenants restricting
or limiting  the ability of the Company  and its  subsidiaries  to,  among other
things:  (i) incur  additional  indebtedness;  (ii) pay  dividends or make other
restricted payments; (iii) make asset dispositions; (iv) permit liens; (v) enter
into sale and leaseback  transactions;  (vi) enter into certain  mergers;  (vii)
make  certain  investments;  and (viii)  enter into  transactions  with  related
persons.  This  may  adversely  affect  the  Company's  ability  to  pursue  its
acquisition strategy. The Credit Agreement also requires the Company to maintain
specific financial ratios and to satisfy certain financial  condition tests. The
Company's  ability to meet those financial ratios and financial  condition tests
can be affected by events beyond its control, and there can be no assurance that
the Company will meet those tests.  The breach of any of those  covenants  could
result in a default under the Credit  Agreement,  the Notes Indentures or all of
them.  In the  event of a  default  under  the  Credit  Agreement  or the  Notes
Indentures,  the lenders could seek to declare all amounts outstanding under the
Credit  Agreement,  together  with  accrued and unpaid  interest,  if any, to be
immediately due and payable.  If the Company were unable to repay those amounts,
the lenders  under the Credit  Agreement  could proceed  against the  collateral
granted  to them to secure  that  indebtedness.  If the  indebtedness  under the
Credit Agreement or the Notes Indentures were to be accelerated, there can be no
assurance  that the assets of the Company  would be  sufficient to repay in full
that indebtedness and the other indebtedness of the Company.

     Substantially  all of the  tangible  assets of the Company are held by, and
substantially  all  of  the  Company's   operating  revenues  are  derived  from
operations of, the Company's subsidiaries.  Therefore,  the Company's ability to
pay interest and  principal  when due under the Credit  Agreement and the Senior
Subordinated  Notes is dependent upon the receipt of sufficient  funds from such
subsidiaries.  The  Company's  obligations  under the Credit  Agreement  and the
Senior   Subordinated   Notes  are   guaranteed,   jointly  and  severally,   by
substantially all of the Company's present and future subsidiaries.

                                        4


Environmental Matters

     As of September 30, 1997,  Iron  Mountain  owned or leased over 150 records
management  facilities.  Under various  federal,  state and local  environmental
laws, ordinances and regulations ("Environmental Laws"), an owner of real estate
or a lessee  conducting  operations  thereon may become  liable for the costs of
investigation,  removal or remediation of soil and  groundwater  contaminated by
certain hazardous substances or wastes or petroleum products.  Certain such laws
impose cleanup  responsibility and liability without regard to whether the owner
or operator of the real estate or operations  thereon knew of or was responsible
for the  contamination,  and whether or not operations at the property have been
discontinued  or title to the property has been  transferred.  In addition,  the
presence of such substances, or the failure to properly remediate such property,
may adversely affect the current property owner's or operator's  ability to sell
or rent such property or to borrow using such property as collateral.  The owner
or operator of contaminated real estate also may be subject to common law claims
by third parties based on damages and costs resulting from off-site migration of
the contamination.

     Certain Environmental Laws govern the removal, encapsulation or disturbance
of  asbestos-containing  materials ("ACMs").  Such laws may impose liability for
release of ACMs and may enable  third  parties to seek  recovery  from owners or
operators of real estate for personal  injury  associated  with exposure to such
substances.  Certain facilities operated by Iron Mountain contain or may contain
ACMs.  In addition,  certain of the  properties  formerly or currently  owned or
operated by Iron Mountain were  previously used for industrial or other purposes
that involved the use or storage of hazardous  substances or petroleum  products
or the  generation  and disposal of  hazardous  wastes,  and in some  instances,
included the operation of underground storage tanks ("USTs"). In connection with
its former and  current  ownership  or  operation  of certain  properties,  Iron
Mountain  may be  potentially  liable  for  environmental  costs  such as  those
discussed  above.  Iron  Mountain  has  from  time  to  time  conducted  certain
environmental  investigations  and remedial  activities at certain of its former
and current facilities,  but an in-depth  environmental review of all properties
has not yet been conducted by or on behalf of Iron Mountain.

     Iron Mountain believes it is in substantial  compliance with all applicable
material  Environmental  Laws. No assurance can be given that there are, or as a
result  of  possible  future   acquisitions  there  will  be,  no  environmental
conditions  for which Iron Mountain might be liable in the future or that future
regulatory  action, as well as compliance with future  Environmental  Laws, will
not require  Iron  Mountain to incur costs for or at its  properties  that could
have a  material  adverse  effect on Iron  Mountain's  financial  condition  and
results of operations.

No Intention to Pay Dividends

     Iron  Mountain  has never  declared or paid cash  dividends  on its capital
stock.  Iron Mountain  intends to retain future earnings for use in its business
and does not  anticipate  declaring  or paying any cash  dividends  on shares of
Common Stock in the foreseeable future. In addition,  Iron Mountain is currently
restricted under the terms of the Credit Agreement and the Notes Indentures from
declaring or paying cash dividends on its Common Stock.

                                        5

                                   THE COMPANY

     Iron Mountain is America's largest records management  company, as measured
by its  revenues.  The Company is a national,  full-service  provider of records
management  and  related  services,  enabling  customers  to  outsource  records
management  functions.  Iron Mountain has a  diversified  customer  base,  which
includes  more than half of the  Fortune  500 and  numerous  commercial,  legal,
banking,  healthcare,   accounting,  insurance,   entertainment  and  government
organizaitions.  The Company provides storage and related services for all major
media, including paper (the dominant form of record storage),  computer disk and
tapes, microfilm and microfiche,  master audio and video tapes, film and optical
disks, X-rays and blueprints. Iron Mountain's principal services provided to its
storage  customers include courier pick-up and delivery,  filing,  retrieval and
destruction of records,  database management,  customized reporting and disaster
recovery  support.  The  Company  also  sells  storage  materials  and  provides
consulting,  facilities  management,  information  technology staffing and other
outsourcing services.

     Iron  Mountain  was  incorporated  in Delaware in 1990 but its  predecessor
operations  date from 1951.  The  principal  executive  office of the Company is
located at 745 Atlantic  Avenue,  Boston,  Massachusetts  02111.  Its  telephone
number is (617) 357-4455.

                                 USE OF PROCEEDS

     Unless otherwise  described in the applicable  Prospectus  Supplement,  the
Company intends to use the net proceeds from the sale of the Offered  Securities
for general corporate purposes, which may include acquisitions,  investments and
the  repayment  of  indebtedness  outstanding  at such time or the  reduction of
amounts  outstanding  under the Credit  Agreement or any other credit  facility.
Pending  utilization  as set  forth  above,  the  proceeds  from the sale of the
Offered   Securities  will  be  invested  in  short-term,   dividend-paying   or
interest-bearing investment grade securities.

                       RATIO OF EARNINGS TO FIXED CHARGES

     The following table sets forth the Company's consolidated ratio of earnings
to fixed charges for the periods indicated (dollars in thousands):




                                                                                                   Pro Forma(1)
                                                                                           -------------------------
                                                                                           For the      For the nine
                                                                      Nine months ended    year ended   months ended
                              Year ended December 31,                   September 30,      December 31, September 30,
                    --------------------------------------------    ---------------------  ------------ ------------
                      1992     1993     1994     1995    1996          1996       1997         1996         1997
                      ----     ----     ----     ----    ----          ----       ----         ----         ----
                                                                                
Ratio of earnings
to fixed charges      1.3x     1.3x     1.2x     1.1x    1.1x          1.1x      0.9x(2)      0.7x(3)      0.8x(4)
- ------------

<FN>
1    Does not include results of operations  prior to the date of  acquisition,
     or pro forma adjustments,  for acquisitions  completed by HIMSCORP or Arcus
     Group, Inc. in 1996 and 1997.
2    The Company  reported a pretax loss for the nine months ended September 30,
     1997. For such period the Company would have needed to generate  additional
     income from continuing  operations,  before  provision for income taxes, of
     $2,156 to cover its fixed charges of $24,425.
3    On a pro forma basis, the Company would have needed to generate  additional
     income from continuing  operations,  before  provision for income taxes, of
     $17,779 to cover its fixed charges of $56,433.
4    On a pro forma basis, the Company would have needed to generate  additional
     income from continuing  operations,  before  provision for income taxes, of
     $7,601 to cover its fixed charges of $44,366.
</FN>


     The ratios of earnings to fixed  charges  presented  above were computed by
dividing the Company's  earnings by fixed  charges.  For this purpose,  earnings
have been  calculated by adding fixed charges to income (loss) before  provision
for income taxes.  Fixed charges consist of interest costs,  whether expensed or
capitalized,  the interest component of rental expense, if any,  amortization of
debt discounts and deferred financing costs, whether expensed or capitalized.

                                        6

                         DESCRIPTION OF DEBT SECURITIES

     The Debt Securities will be direct obligations of the Company, which may be
secured or unsecured,  and which may be senior or  subordinated  indebtedness of
the Company. The Debt Securities may be fully and unconditionally  guaranteed on
a secured or unsecured,  senior or subordinated basis,  jointly and severally by
the Guarantors.  The Debt Securities will be issued under one or more indentures
(an "Indenture") between the Company and a trustee (an "Indenture Trustee"). Any
Indenture will be subject to, and governed by, the Trust  Indenture Act of 1939,
as amended (the "TIA"). The statements made hereunder relating to any Indentures
and the Debt  Securities  to be  issued  thereunder  are  summaries  of  certain
anticipated provisions thereof and do not purport to be complete and are subject
to, and are qualified in their  entirety by reference to, all  provisions of the
Indentures and such Debt Securities.

General

     The Company has filed with the  Registration  Statement with respect to the
Offered  Securities a form of Indenture (as supplemented  from time to time, the
"Senior Indenture") relating to the Senior Securities (as defined) and a form of
Indenture (as  supplemented  from time to time,  the  "Subordinated  Indenture")
relating to the Senior  Subordinated  Securities  (as defined) and  Subordinated
Securities (as defined).  The Debt Securities will be direct  obligations of the
Company and, if issued under the Senior Indenture, will rank equally and ratably
in  right  of  payment  with  other  indebtedness  of the  Company  that  is not
subordinated  (the "Senior  Securities"),  or, if issued under the  Subordinated
Indenture, will be subordinated in right of payment to the prior payment in full
of Senior Indebtedness (as defined in the applicable Prospectus  Supplement) and
may rank  equally and ratably with the Senior  Subordinated  Notes and any other
senior subordinated  indebtedness ("Senior  Subordinated  Securities") or may be
subordinated in right of payment to the Senior Subordinated Notes and such other
senior    subordinated    indebtedness    ("Subordinated    Securities").    See
"--Subordination."  The  Debt  Securities  may be  issued  without  limit  as to
aggregate  principal  amount, in one or more series, in each case as established
from time to time in or pursuant to  authority  granted by a  resolution  of the
Board of Directors of the Company or as  established  in one or more  indentures
supplemental  to any  Indenture.  All Debt  Securities of one series need not be
issued  at the same  time  and,  unless  otherwise  provided,  a  series  may be
reopened,  without  the consent of the  holders of the Debt  Securities  of such
series, for issuances of additional Debt Securities of such series.

     It is anticipated that any Indenture will provide that the Company may, but
need  not,  designate  more than one  Indenture  Trustee  thereunder,  each with
respect to one or more series of Debt  Securities.  Any Indenture  Trustee under
any  Indenture  may resign or be removed  with  respect to one or more series of
Debt Securities,  and a successor Indenture Trustee may be appointed to act with
respect  to such  series.  In the event that two or more  persons  are acting as
Indenture Trustee with respect to different series of Debt Securities, each such
Indenture  Trustee shall be a trustee of a trust under the applicable  Indenture
separate and apart from the trust  administered by any other Indenture  Trustee,
and, except as otherwise  indicated  herein,  any action  described herein to be
taken by the Indenture  Trustee may be taken by each such Indenture Trustee with
respect to, and only with respect to, the one or more series of Debt  Securities
for which it is Indenture Trustee under the applicable Indenture.

     Reference is made to the  Prospectus  Supplement  relating to the series of
Debt Securities being offered for the specific terms thereof,  including,  where
applicable, the following:

     (1)  the title of such Debt Securities and whether such Debt Securities are
          Senior  Securities,  Senior  Subordinated  Securities or  Subordinated
          Securities;

     (2)  the aggregate  principal  amount of such Debt Securities and any limit
          on such aggregate principal amount;


                                        7

     (3)  the percentage of the principal  amount at which such Debt  Securities
          will be issued and, if other than the principal  amount  thereof,  the
          portion of the principal  amount thereof  payable upon  declaration of
          acceleration of the maturity  thereof,  or (if applicable) the portion
          of the principal  amount of such Debt Securities which is convertible,
          or the method by which any such portion shall be determined;

     (4)  if   convertible,   the  terms  on  which  such  Debt  Securities  are
          convertible,  including the initial  conversion  price or rate and the
          conversion  period and any applicable  limitations on the ownership or
          transferability  of the securities into which such Debt Securities are
          convertible;

     (5)  the date or dates, or the method for  determining  such date or dates,
          on which the principal of such Debt Securities will be payable;

     (6)  the rate or rates (which may be fixed or  variable),  or the method by
          which  such  rate or rates  shall be  determined,  at which  such Debt
          Securities will bear interest, if any;

     (7)  the date or dates, or the method for  determining  such date or dates,
          from  which  any  interest  will  accrue,  the dates on which any such
          interest will be payable,  the record dates for such interest  payment
          dates,  or the method by which any such date shall be determined,  the
          person to whom such  interest  shall be  payable,  and the basis  upon
          which  interest  shall be  calculated  if other than that of a 360-day
          year of 12 months consisting of 30 days each;

     (8)  the place or places  where  (i) the  principal  of,  any  premium  and
          interest  on, and any  additional  amounts  payable in respect of such
          Debt  Securities  will be payable,  (ii) such Debt  Securities  may be
          surrendered for conversion or registration of transfer or exchange and
          (iii)  notices or  demands  to or upon the  Company in respect of such
          Debt Securities and the applicable Indenture may be served;

     (9)  the period or periods  within which,  the price or prices at which and
          the terms and  conditions  upon  which  such  Debt  Securities  may be
          redeemed,  as a whole or in part, at the option of the Company, if the
          Company is to have such an option;

     (10) the  obligation,  if any, of the Company to redeem,  repay or purchase
          such  Debt  Securities  pursuant  to any  sinking  fund  or  analogous
          provision  or at the  option of a holder  thereof,  and the  period or
          periods  within which,  the price or prices at which and the terms and
          conditions upon which such Debt Securities will be redeemed, repaid or
          purchased, as a whole or in part, pursuant to such obligation;

     (11) if other than U.S.  dollars,  the currency or currencies in which such
          Debt Securities are  denominated  and payable,  which may be a foreign
          currency  or units of two or more  foreign  currencies  or a composite
          currency or currencies, and the terms and conditions relating thereto;

     (12) if the  principal  of or  premium,  if any,  or  interest on such Debt
          Securities  is to be  payable,  at the  election  of the  Company or a
          holder thereof, in one or more currencies or currency units other than
          that or those in which such Debt  Securities are stated to be payable,
          the  currency,  currencies  or currency  units in which payment of the
          principal of and premium,  if any, and interest on Debt  Securities of
          such series as to which such  election  is made shall be payable,  and
          the periods within which and the terms and conditions  upon which such
          election is to be made;

     (13) whether  the  amount of  payments  of  interest  on,  principal  of or
          premium,  if any,  on such  Debt  Securities  may be  determined  with
          reference to an index, formula or other method (which index,

                                        8

          formula  or  method  may,  but  need  not,  be  based  on a  currency,
          currencies,   currency   unit  or  units  or  composite   currency  or
          currencies) and the manner in which such amounts shall be determined;

     (14) the events of default or  covenants  of such Debt  Securities,  to the
          extent  different  from or in  addition  to  those  described  in this
          Prospectus,  and any provisions granting special rights to the holders
          of such Debt  Securities  upon the  occurrence of events  specified in
          such Prospectus Supplement;

     (15) whether such Debt  Securities  will be issued in  certificated  and/or
          book-entry form;

     (16) whether such Debt Securities will be in registered or bearer form and,
          if in registered form, the denominations  thereof if other than $1,000
          and  any  integral  multiple  thereof  and,  if in  bearer  form,  the
          denominations thereof and terms and conditions relating thereto;

     (17) whether any of such Debt  Securities  are to be issuable in  permanent
          global  form  (a  "Global   Security")  and,  if  so,  the  terms  and
          conditions,  if any, upon which  interests in such Global Security may
          be exchanged,  in whole or in part, for the individual Debt Securities
          represented thereby;

     (18) the applicability,  if any, of the defeasance and covenant  defeasance
          provisions described in this Prospectus or any modification thereof;

     (19) if such Debt  Securities  are to be issued  upon the  exercise of debt
          warrants,  the time,  manner and place for such Debt  Securities to be
          authenticated and delivered;

     (20) whether and under what  circumstances  the Company will pay additional
          amounts on such Debt  Securities in respect of any tax,  assessment or
          governmental  charge  and, if so,  whether  the Company  will have the
          option to redeem such Debt Securities in lieu of making such payment;

     (21) the   subordination   provisions,   if  any,  relating  to  such  Debt
          Securities;

     (22) the  provisions,  if any,  relating to any security  provided for such
          Debt Securities; and

     (23) the  provisions,  if any,  relating  to any  guarantee  of  such  Debt
          Securities.

     The Debt Securities may provide for less than the entire  principal  amount
thereof to be payable upon  declaration of acceleration of the maturity  thereof
("Original Issue Discount Securities"). If material or applicable,  special U.S.
federal income tax, accounting and other  considerations  applicable to Original
Issue  Discount  Securities  will  be  described  in the  applicable  Prospectus
Supplement.

     Except as described under "--Merger, Consolidation or Sale of Assets" or as
may be set forth in any Prospectus Supplement, an Indenture will not contain any
other  provisions  that  would  limit  the  ability  of  the  Company  to  incur
indebtedness or that would afford holders of the Debt  Securities  protection in
the event of a highly leveraged or similar transaction  involving the Company or
in the  event  of a  change  of  control.  Reference  is made to the  applicable
Prospectus  Supplement  for  information  with  respect to any  deletions  from,
modifications  of or additions  to the events of default or  covenants  that are
described  below,  including  any  addition  of a covenant  or other  provisions
providing event risk or similar protection.

Denominations, Interest, Registration and Transfer

     Unless otherwise  described in the applicable  Prospectus  Supplement,  the
Debt Securities of any series that are registered securities,  other than Global
Securities   (which  may  be  of  any   denomination),   shall  be  issuable  in
denominations of $1,000 and any integral multiple thereof.

                                        9

     Unless otherwise  specified in the applicable  Prospectus  Supplement,  the
interest  on and  principal  of and  premium,  if  any,  on any  series  of Debt
Securities  will be  payable  at the  corporate  trust  office of the  Indenture
Trustee,  initially  at the  address  which will be set forth in the  applicable
Prospectus Supplement;  provided that, at the option of the Company,  payment of
interest  may be made by check  mailed to the  address  of the  person  entitled
thereto as it appears in the applicable register or by wire transfer of funds to
such person at an account maintained within the United States.

     Any  interest  not  punctually  paid or duly  provided  for on any interest
payment  date  with  respect  to a Debt  Security  ("Defaulted  Interest")  will
forthwith  cease to be payable to the holder on the  applicable  regular  record
date and may either be paid to the person in whose  name such Debt  Security  is
registered  at the close of  business  on a special  record  date (the  "Special
Record  Date") for the  payment of such  Defaulted  Interest  to be fixed by the
applicable  Indenture  Trustee,  notice  whereof shall be given to the holder of
such Debt  Security not less than 10 days prior to such Special  Record Date, or
may be paid at any  time in any  other  lawful  manner,  all as more  completely
described in the applicable Indenture.

     Subject to  certain  limitations  imposed  upon Debt  Securities  issued in
book-entry  form,  the Debt  Securities of any series will be  exchangeable  for
other  Debt  Securities  of the same  series and of a like  aggregate  principal
amount and tenor of different  authorized  denominations  upon surrender of such
Debt  Securities  at the  corporate  trust  office of the  applicable  Indenture
Trustee.  In  addition,   subject  to  certain  limitations  imposed  upon  Debt
Securities  issued in book-entry  form, the Debt Securities of any series may be
surrendered for conversion or registration of transfer  thereof at the corporate
trust  office  of  the  applicable   Indenture  Trustee.   Every  Debt  Security
surrendered for  conversion,  registration of transfer or exchange shall be duly
endorsed or accompanied by a written  instrument of transfer.  No service charge
will  be  made  for  any  registration  of  transfer  or  exchange  of any  Debt
Securities,  but the Indenture  Trustee or the Company may require  payment of a
sum  sufficient  to  cover  any tax or  other  governmental  charge  payable  in
connection  therewith.  If the applicable  Prospectus  Supplement  refers to any
transfer agent (in addition to the Indenture  Trustee)  initially  designated by
the Company  with respect to any series of Debt  Securities,  the Company may at
any time rescind the  designation of any such transfer agent or approve a change
in the location  through  which any such  transfer  agent acts,  except that the
Company  will be required to maintain a transfer  agent in each place of payment
for such  series.  The Company  may at any time  designate  additional  transfer
agents with respect to any series of Debt Securities.

     Neither  the  Company nor any  Indenture  Trustee  shall be required to (i)
issue, register the transfer of or exchange Debt Securities of any series during
a period  beginning  at the opening of business 15 days before any  selection of
Debt  Securities  of that  series  to be  redeemed  and  ending  at the close of
business  on (a) if  such  Debt  Securities  are  issuable  only  as  registered
securities,  the day of the mailing of the relevant notice of redemption and (b)
if such Debt Securities are issuable as bearer securities,  the day of the first
publication of the relevant notice of redemption or, if such Debt Securities are
also issuable as registered securities and there is no publication,  the mailing
of the relevant notice of redemption;  (ii) register the transfer of or exchange
any registered  security so selected for redemption in whole or in part, except,
in the case of any  registered  security  to be  redeemed  in part,  the portion
thereof not to be redeemed;  (iii) exchange any bearer  security so selected for
redemption  except that such a bearer security may be exchanged for a registered
security of that series and like tenor;  provided that such registered  security
shall be simultaneously  surrendered for redemption; or (iv) issue, register the
transfer  of or  exchange  any Debt  Security  which  has been  surrendered  for
repayment at the option of the holder,  except the portion, if any, of such Debt
Security not to be so repaid.

                                       10

Merger, Consolidation or Sale of Assets

     The Company may not  consolidate  or merge with or into (whether or not the
Company is the surviving corporation),  or sell, assign, transfer, lease, convey
or otherwise  dispose of all or substantially all of its properties or assets in
one or more related  transactions,  to another entity unless: (a) the Company is
the  surviving  corporation  or the  entity  formed  by or  surviving  any  such
consolidation  or merger  (if other  than the  Company)  or to which  such sale,
assignment,  transfer,  lease,  conveyance or other  disposition shall have been
made is a corporation organized or existing under the laws of the United States,
any state  thereof or the  District  of  Columbia;  (b) the entity  formed by or
surviving  any such  consolidation  or merger (if other than the Company) or the
entity to which such sale,  assignment,  transfer,  lease,  conveyance  or other
disposition  shall have been made  assumes  all the  obligations  of the Company
under  the  Debt  Securities  and  any  Indenture  (pursuant  to a  supplemental
indenture  in  a  form  reasonably  satisfactory  to  the  applicable  Indenture
Trustee);  and (c) immediately  after such transaction no event of default under
the applicable Indenture, and no event which, after notice or the lapse of time,
or both, would become such an event of default exists.

Certain Covenants

     Provision  of Financial  Information.  Whether or not required by the rules
and  regulations  of  the  Commission,  so  long  as  any  Debt  Securities  are
outstanding,  the Company will furnish to the holders of Debt Securities (a) all
quarterly  and  annual  financial  information  that  would  be  required  to be
contained in a filing with the  Commission on Forms 10-Q and 10-K if the Company
were  required to file such  Forms,  including a  "Management's  Discussion  and
Analysis of Financial  Condition and Results of Operations" and, with respect to
the  annual  information  only,  a report  thereon  by the  Company's  certified
independent accountants and (b) all financial information that would be required
to be  included  in a Form 8-K filed with the  Commission  if the  Company  were
required to file such reports. In addition, whether or not required by the rules
and  regulations  of the  Commission,  the Company  will file a copy of all such
information and reports with the Commission for public availability  (unless the
Commission will not accept such a filing) and make such information available to
investors who request it in writing.

     Additional Covenants.  Any additional or different covenants of the Company
(or modifications to the foregoing covenants) with respect to any series of Debt
Securities will be set forth in the applicable Prospectus Supplement.

Events of Default, Notice and Waiver

     Each  Indenture  will  provide  that the  following  events are  "Events of
Default" with respect to any series of Debt Securities  issued  thereunder;  (a)
default for 30 days in the payment of any  installment  on any Debt  Security of
such series; (b) default in the payment of the principal of (or premium, if any,
on) any Debt Security of such series at its maturity;  (c) default in making any
sinking  fund  payments as required for any Debt  Security of such  series;  (d)
default in the performance of any other covenant of the Company contained in the
applicable  Indenture  (other than a covenant added to such Indenture solely for
the benefit of a series of Debt  Securities  issued  thereunder  other than such
series),  such default  having  continued  for 60 days after  written  notice as
provided in such Indenture; (e) default in the payment of an aggregate principal
amount  exceeding a specified  dollar amount of any evidence of  indebtedness of
the Company or any  mortgage,  indenture  or other  instrument  under which such
indebtedness is issued or by which such  indebtedness  is secured,  such default
having  occurred after the expiration of any applicable  grace period and having
resulted  in  the   acceleration  of  the  maturity  of  such   indebtedness  or
constituting a default in the payment of such  indebtedness  at final  maturity,
but only if such  indebtedness  is not  discharged or such  acceleration  is not
rescinded  or  annulled;  (f)  certain  events  of  bankruptcy,   insolvency  or
reorganization, or court appointment of a receiver, liquidator or trustee of the
Company or any Significant  Subsidiary (as hereinafter  defined) or any of their
respective property; and (g) any other event of default provided with respect to
a particular series of Debt Securities.  The term "Significant Subsidiary" means
each significant  subsidiary (as defined in Regulation S-X promulgated under the
Securities Act) of the Company.

                                       11

     If an Event of Default (other than an Event of Default  described in clause
(f) above) under any Indenture with respect to Debt  Securities of any series at
the time  outstanding  occurs  and is  continuing,  then in every  such case the
applicable  Indenture Trustee or the holders of at least 25% in principal amount
of the  outstanding  Debt  Securities  of that series may declare the  principal
amount (or, if the Debt  Securities of that series are Original  Issue  Discount
Securities or indexed securities, such portion of the principal amount as may be
specified in the terms thereof) of all of the Debt  Securities of that series to
be due and payable  immediately by written notice thereof to the Company (and to
the  applicable  Indenture  Trustee  if  given by the  holders).  If an Event of
Default described in clause (f) above with respect to the Debt Securities of any
series at the time outstanding shall occur, the principal amount of all the Debt
Securities of that series (or, in the case of any such Original  Issue  Discount
Security or other Debt Security, such specified amount) will automatically,  and
without any action by the Indenture Trustee or any holder of such series of Debt
Securities,  become immediately due and payable. However, at any time after such
a declaration of acceleration with respect to Debt Securities of such series (or
of all Debt Securities then outstanding under the applicable  Indenture,  as the
case may be) has been made,  but before a judgment  or decree for payment of the
money due has been obtained by the applicable  Indenture Trustee, the holders of
not less than a majority in principal  amount of outstanding  Debt Securities of
such series (or of all Debt  Securities  then  outstanding  under the applicable
Indenture,  as the case may be) may rescind and annul such  declaration  and its
consequences  if (i) the  Company  shall  have  deposited  with  the  applicable
Indenture  Trustee all required  payments of the principal of (and  premium,  if
any)  and  interest  on the  Debt  Securities  of such  series  (or of all  Debt
Securities then outstanding under the applicable Indenture, as the case may be),
plus  certain  fees,  expenses,  disbursements  and  advances of the  applicable
Indenture Trustee, and (ii) all Events of Default, other than the non-payment of
accelerated  principal (or specified  portion thereof),  or premium,  if any, or
interest on the Debt  Securities of such series (or of all Debt  Securities then
outstanding under the applicable Indenture,  as the case may be) have been cured
or waived as provided in the applicable  Indenture.  Each of the Indentures will
also provide that the holders of not less than a majority in principal amount of
the  outstanding  Debt  Securities of any series (or of all Debt Securities then
outstanding  under the applicable  Indenture,  as the case may be) may waive any
past default with respect to such series and its consequences,  except a default
(i) in the payment of the  principal of (or premium,  if any) or interest on any
Debt  Security  of such  series or (ii) in respect of a  covenant  or  provision
contained in the applicable Indenture that cannot be modified or amended without
the consent of the holder of each outstanding Debt Security affected thereby.

     The  Indenture  Trustee  will be  required to give notice to the holders of
Debt  Securities  within 90 days of a default  under  the  applicable  Indenture
unless  such  default  has been cured or waived;  provided,  however,  that such
Indenture  Trustee  may  withhold  notice to the  holders  of any series of Debt
Securities  of any default with respect to such series  (except a default in the
payment  of the  principal  of (or  premium,  if any) or  interest  on any  Debt
Security of such series or in the payment of any  sinking  fund  installment  in
respect of any Debt Security of such series) if specified  responsible  officers
of such  Indenture  Trustee  consider such  withholding to be in the interest of
such holders.

     Each  Indenture  will  provide  that no holders of Debt  Securities  of any
series may institute any proceedings, judicial or otherwise, with respect to the
Indenture  or for any  remedy  thereunder,  except in the case of failure of the
Indenture  Trustee,  for 60 days, to act after it has received a written request
to institute  proceedings  in respect of an event of default from the holders of
not less than a majority in principal  amount of the outstanding Debt Securities
of such series, as well as an offer of reasonable indemnity. This provision will
not prevent,  however,  any holder of Debt Securities from  instituting suit for
the  enforcement  of  payment  of the  principal  of (and  premium,  if any) and
interest on such Debt Securities at the respective due dates thereof.

     Subject to provisions in the applicable Indenture relating to its duties in
case of default,  no Indenture  Trustee will be under any obligation to exercise
any of its rights or powers under such  Indenture at the request or direction of
any  holders  of any  series of Debt  Securities  then  outstanding  under  such
Indenture,  unless such  holders  shall have  offered to the  Indenture  Trustee
reasonable  security  or  indemnity.  The holders of not less than a majority in
principal  amount of the  outstanding  Debt  Securities of any series (or of all
Debt Securities then outstanding under the applicable Indenture, as the case may
be) shall have the right to direct the time,  method and place of conducting any
proceeding for any remedy available to the applicable  Indenture Trustee,  or of
exercising any trust or power conferred upon such Indenture Trustee. However, an
Indenture  Trustee may refuse to follow any direction  which is in conflict with
any

                                       12

law or the  Indenture,  which may  involve  such  Indenture  Trustee in personal
liability or which may be unduly  prejudicial to the holders of Debt  Securities
of such series not joining therein.

     The Company will be required to deliver to each Indenture  Trustee annually
a  certificate,  signed by one of several  specified  officers  of the  Company,
stating  whether or not such  officer has  knowledge  of any  default  under the
applicable Indenture and, if so, specifying each such default and the nature and
status thereof.

Modification of the Indenture

     Modifications  and amendments of an Indenture will be permitted to be made,
and a waiver of any existing  default or  compliance  with any  provision may be
made,  only with the  consent  of the  holders  of not less than a  majority  in
principal  amount of all  outstanding  Debt  Securities or series of outstanding
Debt Securities  which are affected by such  modification,  amendment or waiver;
provided,  however, that no such modification,  amendment or waiver may, without
the  consent  of the holder of each such Debt  Security  affected  thereby,  (i)
change the stated  maturity of the principal of, or any  installment of interest
(or premium, if any) on any such Debt Security; (ii) reduce the principal amount
of, or the rate or amount of interest on, or any premium  payable on  redemption
of, any such Debt  Security,  or reduce the amount of  principal  of an Original
Issue  Discount  Security  that would be due and  payable  upon  declaration  of
acceleration  of the  maturity  thereof or would be provable in  bankruptcy,  or
adversely affect any right of repayment of the holder of any such Debt Security;
(iii)  change the place of  payment,  or the coin or  currency,  for  payment of
principal  of,  premium,  if any, or interest  on any such Debt  Security;  (iv)
impair the right to institute suit for the enforcement of any payment on or with
respect to any such Debt Security; (v) reduce the percentage of outstanding Debt
Securities of any series  necessary to modify or amend the  Indenture,  to waive
compliance with certain  provisions thereof or certain defaults and consequences
thereunder  or to reduce  the  quorum or voting  requirements  set forth in such
Indenture;  (vi) waive a default or event of default in the payment of principal
of or premium, if any, or interest on the Debt Securities (except a recission of
acceleration  of the Debt  Securities  by holders of not less than a majority in
principal  amount  of Debt  Securities  or series  of Debt  Securities  affected
thereby and that  resulted from such  acceleration);  or (vii) modify any of the
foregoing  provisions or any of the provisions relating to the waiver of certain
past defaults or certain covenants,  except to increase the required  percentage
to effect such action or to provide that  certain  other  provisions  may not be
modified or waived without the consent of the holder of such Debt Security.

     Modifications  and  amendments of an Indenture will be permitted to be made
by the Company  and the  applicable  Indenture  Trustee  thereunder  without the
consent of any holder of Debt Securities for any of the following purposes:  (i)
to evidence the  succession  of another  person to the Company as obligor  under
such  Indenture;  (ii) to add to the covenants of the Company for the benefit of
the holders of all or any series of Debt Securities or to surrender any right or
power  conferred  upon the  Company  in such  Indenture;  (iii) to add events of
default for the benefit of the holders of all or any series of Debt  Securities;
(iv) to add or change any provisions of the Indenture to facilitate the issuance
of, or to  liberalize  certain  terms of, Debt  Securities in bearer form, or to
permit or facilitate  the issuance of Debt  Securities in  uncertificated  form;
provided  that such  action  shall not  adversely  affect the  interests  of the
holders  of the Debt  Securities  in any  material  respect;  (v) to  change  or
eliminate  any  provisions  of the  Indenture;  provided that any such change or
elimination  shall  become  effective  only when  there  are no Debt  Securities
outstanding  of any series  created  prior  thereto  which are  entitled  to the
benefit  of such  provision;  (vi) to  secure  the  Debt  Securities;  (vii)  to
establish  the form or terms of Debt  Securities  of any series,  including  the
provisions  and  procedures,  if  applicable,  for the  conversion  of such Debt
Securities  into  Common  Stock or  Preferred  Stock;  (viii) to provide for the
acceptance of  appointment  by a successor  Indenture  Trustee or facilitate the
administration  of the  trusts  under an  Indenture  by more than one  Indenture
Trustee;  (ix) to cure any ambiguity,  defect or  inconsistency in an Indenture;
provided that such action shall not adversely affect the interests of holders of
Debt Securities of any series in any material respect;  or (x) to supplement any
of the  provisions  of an  Indenture  to  the  extent  necessary  to  permit  or
facilitate  defeasance  and  discharge  of any  series of such Debt  Securities;
provided  that such  action  shall not  adversely  affect the  interests  of the
holders of the Debt Securities of any series in any material respect.

     Each Indenture will provide that in determining  whether the holders of the
requisite principal amount of outstanding Debt Securities of a series have given
any  request,  demand,  authorization,  direction,  notice,  consent  or  waiver
thereunder  or  whether a quorum is  present  at a meeting  of  holders  of Debt
Securities, (i) the principal amount of an Original Issue Discount Security that

                                       13

shall be deemed to be outstanding  shall be the amount of the principal  thereof
that  would  be due  and  payable  as of the  date of  such  determination  upon
declaration of acceleration of the maturity  thereof,  (ii) the principal amount
of a Debt  Security  denominated  in a  foreign  currency  that  shall be deemed
outstanding  shall be the U.S. dollar  equivalent,  determined on the issue date
for such Debt Security,  of the principal amount (or, in the case of an Original
Issue Discount  Security,  the U.S. dollar  equivalent on the issue date of such
Debt  Security of the amount  determined  as  provided in (i) above),  (iii) the
principal amount of an indexed security that shall be deemed  outstanding  shall
be the  principal  face amount of such  indexed  security at original  issuance,
unless  otherwise  provided  with  respect  to  such  indexed  security  in  the
applicable Indenture, and (iv) Debt Securities owned by the Company or any other
obligor  upon the Debt  Securities  or any  affiliate  of the Company or of such
other obligor shall be disregarded.

     Each  Indenture  will  contain  provisions  for  convening  meetings of the
holders of each series of Debt  Securities.  A meeting may be called at any time
by an Indenture Trustee,  and also, upon request,  by the Company or the holders
of at least 25% in principal  amount of the outstanding  Debt Securities of such
series,  in any such case,  upon notice  given as  provided  in such  Indenture.
Except for any  consent  that must be given by the holder of each Debt  Security
affected by certain  modifications,  amendments and waiver of an Indenture,  any
resolution  presented at a meeting or adjourned meeting duly reconvened at which
a quorum is present may be adopted by the  affirmative  vote of the holders of a
majority in principal  amount of the outstanding Debt Securities of that series;
provided,  however,  that,  except as referred  to above,  any  resolution  with
respect to any  request,  demand,  authorization,  direction,  notice,  consent,
waiver or other  action  that may be made,  given or taken by the  holders  of a
specified percentage,  which is less than a majority, in principal amount of the
outstanding Debt Securities of a series may be adopted at a meeting or adjourned
meeting duly reconvened at which a quorum is present by the affirmative  vote of
the holders of such specified  percentage in principal amount of the outstanding
Debt Securities for that series.  Any resolution passed or decision taken at any
meeting of holders of Debt Securities of any series duly held in accordance with
the applicable  Indenture  will be binding on all holders of Debt  Securities of
that series. The quorum at any meeting called to adopt a resolution,  and at any
reconvened  meeting,  will be persons  holding  or  representing  a majority  in
principal  amount of the  outstanding  Debt  Securities  of a series;  provided,
however,  that if any action is to be taken at such  meeting  with  respect to a
consent or waiver which may be given by the holders of not less than a specified
percentage in principal  amount of the outstanding  Debt Securities of a series,
the persons  holding or  representing  such  specified  percentage  in principal
amount of the  outstanding  Debt  Securities  of such series will  constitute  a
quorum.

     Notwithstanding the foregoing provisions,  each Indenture will provide that
if any action is to be taken at a meeting of holders of Debt  Securities  of any
series with respect to any request, demand,  authorization,  direction,  notice,
consent,  waiver or other action that such Indenture  expressly  provides may be
made,  given or taken by the holders of such  series and one or more  additional
series:  (i) there shall be no minimum quorum  requirement  for such meeting and
(ii) the principal amount of the outstanding Debt Securities of such series that
vote in  favor  of  such  request,  demand,  authorization,  direction,  notice,
consent,  waiver or other  action  shall be taken into  account  in  determining
whether such request, demand, authorization,  direction, notice, consent, waiver
or other action has been made, given or taken under such Indenture.

Discharge, Defeasance and Covenant Defeasance

     The Company may discharge  certain  obligations to holders of any series of
Debt Securities that have not already been delivered to the applicable Indenture
Trustee  for  cancellation  and that  either have become due and payable or will
become due and payable within one year (or scheduled for  redemption  within one
year) by irrevocably  depositing with such Indenture Trustee, in trust, funds in
such currency or  currencies,  currency  unit or units or composite  currency or
currencies in which such Debt Securities are payable in an amount  sufficient to
pay the entire indebtedness on such Debt Securities in respect of principal (and
premium,  if any)  and  interest  to the  date of such  deposit  (if  such  Debt
Securities  have become due and payable) or to the stated maturity or redemption
date, as the case may be.

     An  Indenture  may provide  that,  if certain  provisions  thereof are made
applicable  to the  Debt  Securities  of or  within  a  series  pursuant  to the
Indenture,  the Company may elect either (i) to defease and be  discharged  from
any 

                                       14




and all  obligations  with  respect  to such  Debt  Securities  (except  for the
obligation to pay  additional  amounts,  if any, upon the  occurrence of certain
events of tax,  assessment  or  governmental  charge with respect to payments on
such Debt Securities and the obligations to register the transfer or exchange of
such Debt  Securities,  to replace  temporary or mutilated,  destroyed,  lost or
stolen Debt Securities,  to maintain an office or agency in respect of such Debt
Securities and to hold moneys for payment in trust) ("defeasance") or (ii) to be
released from its obligations with respect to such Debt Securities under certain
sections  of  such  Indenture   (including  the  restrictions   described  under
"--Certain  Covenants")  and,  if  provided  pursuant  to  such  Indenture,  its
obligations with respect to any other covenant,  and any omission to comply with
such  obligations  shall not  constitute  a default or an event of default  with
respect to such Debt Securities ("covenant defeasance"), in either case upon the
irrevocable  deposit by the Company with the applicable  Indenture  Trustee,  in
trust, of an amount,  in such currency or currencies,  currency unit or units of
composite  currency or currencies in which such Debt  Securities  are payable at
stated  maturity,  or  Government  Obligations  (as  defined  below),  or  both,
applicable  to such Debt  Securities  which  through  the  scheduled  payment of
principal and interest,  in accordance with their terms will provide money in an
amount sufficient to pay the principal of (and premium,  if any) and interest on
such Debt  Securities,  and any  mandatory  sinking fund or  analogous  payments
thereon, on the scheduled dates therefor.

     Such a trust may be  established  only if, among other things,  the Company
has  delivered  to the  applicable  Indenture  Trustee an opinion of counsel (as
specified in the  applicable  Indenture)  to the effect that the holders of such
Debt Securities will not recognize income,  gain or loss for U.S. federal income
tax purposes as a result of such  defeasance or covenant  defeasance and will be
subject to U.S.  federal income tax on the same amounts,  in the same manner and
at the same times as would  have been the case if such  defeasance  or  covenant
defeasance had not occurred.

     "Government  Obligations" means securities which are (i) direct obligations
of the United  States of  America or the  government  which  issued the  foreign
currency in which the Debt  Securities of a particular  series are payable,  for
the payment of which its full faith and credit is pledged or (ii) obligations of
a person controlled or supervised by and acting as an agency or  instrumentality
of the United  States of America or such  government  which  issued the  foreign
currency in which the Debt  Securities of a particular  series are payable,  the
payment  of which is  unconditionally  guaranteed  as a full  faith  and  credit
obligation by the United States of America or such other  government,  which, in
either case, are not callable or redeemable at the option of the issuer thereof,
and shall also include a depository receipt issued by a bank or trust company as
custodian with respect to any such Government  Obligation or a specific  payment
of interest  on or  principal  of any such  Government  Obligation  held by such
custodian for the account of the holder of a depository  receipt;  provided that
(except  as  required  by law)  such  custodian  is not  authorized  to make any
deduction from the amount payable to the holder of such depository  receipt from
any amount received by the custodian in respect of the Government Obligations or
the specific  payment of interest on or principal of the Government  Obligations
evidenced by such depository receipt.

     Unless otherwise provided in the applicable Prospectus Supplement, if after
the  Company  has  deposited  funds  and/or  Government  Obligations  to  effect
defeasance or covenant defeasance with respect to Debt Securities of any series,
(i) the holder of a Debt Security of such series is entitled to, and does, elect
pursuant  to the  applicable  Indenture  or the terms of such Debt  Security  to
receive  payment in a currency,  currency unit or composite  currency other than
that in which such  deposit has been made in respect of such Debt  Security,  or
(ii) a Conversion  Event (as defined  below)  occurs in respect of the currency,
currency  unit or composite  currency in which such  deposit has been made,  the
indebtedness represented by such Debt Security shall be deemed to have been, and
will be, fully discharged and satisfied  through the payment of the principal of
(and premium,  if any) and interest on such Debt Security as they become due out
of the proceeds yielded by converting the amount so deposited in respect of such
Debt Security into the  currency,  currency unit or composite  currency in which
such  Debt  Security  becomes  payable  as a  result  of such  election  or such
cessation of usage based on the applicable  market  exchange  rate.  "Conversion
Event" means the cessation of use of (i) a currency,  currency unit or composite
currency  both by the  government  of the country which issued such currency and
for  the  settlement  of   transactions  by  a  central  bank  or  other  public
institutions of or within the international banking community, (ii) the ECU both
within the European  Monetary  System and for the settlement of  transactions by
public institutions of or within the European  Communities or (iii) any currency
unit or composite

                                       15

currency  other  than the ECU for the  purposes  for  which it was  established.
Unless otherwise provided in the applicable Prospectus Supplement,  all payments
of principal of (and premium,  if any) and interest on any Debt Security that is
payable  in a  foreign  currency  that  ceases to be used by its  government  of
issuance shall be made in U.S. dollars.

     If the  Company  effects  covenant  defeasance  with  respect  to any  Debt
Securities and such Debt  Securities are declared due and payable because of the
occurrence  of any event of default  and the amount in such  currency,  currency
unit or  composite  currency  in which such Debt  Securities  are  payable,  and
Government  Obligations  on deposit with the Trustee,  are not sufficient to pay
amounts due on such Debt  Securities at the time of the  acceleration  resulting
from such event of default  (even though they would have been  sufficient to pay
amounts due under such Debt  Security  and their stated time of  maturity),  the
Company  would remain  liable to make payment of such amounts due at the time of
acceleration.

     Notwithstanding the description set forth under "--Subordination" below, in
the  event  that  the  Company  deposits  money  or  Government  Obligations  in
compliance  with the applicable  Indenture in order to defease all or certain of
its  obligations  with  respect  to  any  Senior   Subordinated   Securities  or
Subordinated Securities,  the moneys or Government Obligations so deposited will
not be  subject  to the  subordination  provisions  of  such  Indenture  and the
indebtedness  evidenced by such Senior  Subordinated  Securities or Subordinated
Securities will not be subordinated in right of payment to the holders of senior
indebtedness  and senior  subordinated  indebtedness (as the case may be) to the
extent of the moneys or Government Obligations so deposited.

     The applicable  Prospectus  Supplement may further describe the provisions,
if any,  permitting  such  defeasance  or  covenant  defeasance,  including  any
modifications  to the  provisions  described  above,  with  respect  to the Debt
Securities of or within a particular series.

Conversion Rights

     The terms and  conditions,  if any,  upon  which  the Debt  Securities  are
convertible  into  Common  Stock or  Preferred  Stock  will be set  forth in the
Prospectus  Supplement  relating  thereto.  Such terms will include whether such
Debt  Securities  are  convertible  into Common  Stock or Preferred  Stock,  the
conversion  price or rate (or manner of  calculation  thereof),  the  conversion
period, provisions as to whether conversion will be at the option of the holders
of the Company,  the events  requiring an adjustment of the conversion  price or
rate and provisions  affecting conversion in the event of the redemption of such
Debt Securities and any restrictions on conversion.

Subordination

     The terms and conditions, if any, upon which Senior Subordinated Securities
or  Subordinated  Securities of a series are  subordinated to Debt Securities of
another series or to other  indebtedness of the Company will be set forth in the
applicable Prospectus  Supplement.  Such terms will include a description of the
indebtedness   ranking  senior  to  such  Senior   Subordinated   Securities  or
Subordinated  Securities,  the  restrictions  on payments to the holders of such
Senior Subordinated  Securities or Subordinated  Securities while a default with
respect to such senior indebtedness is continuing, the restrictions,  if any, on
payments to the holders of such Senior  Subordinated  Securities or Subordinated
Securities  following an Event of Default,  and provisions  requiring holders of
such Senior Subordinated  Securities or Subordinated Securities to remit certain
payments to holders of senior indebtedness.

Global Securities

     If  so  set  forth  in  the  applicable  Prospectus  Supplement,  the  Debt
Securities  of a series  may be issued in whole or in part in the form of one or
more  Global  Securities  that  will be  deposited  with,  or on  behalf  of,  a
depositary  identified in the applicable  Prospectus Supplement relating to such
series.  Global Securities may be issued in either registered or bearer form and
in either  temporary or permanent  form.  The specific  terms of the  depositary

                                       16

arrangement with respect to any such series of Debt Securities will be described
in the applicable Prospectus Supplement.

                          DESCRIPTION OF CAPITAL STOCK

     The following description of the capital stock of Iron Mountain and certain
provisions  of the  Restated  Certificate  and the  By-Laws is a summary  and is
qualified  in its entirety by  reference  to the  Restated  Certificate  and the
By-Laws.

     Iron Mountain's  authorized capital stock consists of 100,000,000 shares of
Common Stock,  1,000,000  shares of nonvoting  common stock,  $.01 par value per
share  ("Nonvoting  Common Stock") and 2,000,000  shares of Preferred  Stock. No
shares of Preferred  Stock have been  issued.  There were  13,452,917  shares of
Common  Stock held by 219  holders of record and no shares of  Nonvoting  Common
Stock issued and outstanding as of January 5, 1998.

Common Stock

     The rights of holders of the Common  Stock and the  Nonvoting  Common Stock
are identical in all respects except voting and convertibility.

     Dividends. Holders of record of shares of Common Stock and Nonvoting Common
Stock on the  record  date  fixed by the Iron  Mountain  Board are  entitled  to
receive  such  dividends  as may be declared by the Iron  Mountain  Board out of
funds legally  available for such purpose.  No dividends may be declared or paid
in cash or property on any share of either class, however, unless simultaneously
the same  dividend is declared or paid on each share of the other class.  In the
case of any stock  dividend,  holders of each class are  entitled to receive the
same percentage dividend (payable in shares of that class) as the holders of the
other class.

     Iron  Mountain  is  currently  restricted  under  the  terms of the  Credit
Agreement and the Notes  Indentures from paying cash dividends on the Common and
Nonvoting Common Stock.  Even if funds were to be available,  Iron Mountain does
not intend to pay dividends in the foreseeable future.

     Voting  Rights.  Except  as  otherwise  required  by law,  on  each  matter
submitted  for a vote of  stockholders,  holders  of shares of Common  Stock are
entitled to one vote per share and  holders of  Nonvoting  Common  Stock are not
entitled to vote.

     Under the Restated Certificate,  the vote of holders of at least 80% of the
voting  power of all  outstanding  shares  of  capital  stock  entitled  to vote
generally in the election of Directors,  voting  together as a single class (the
"Voting Power"),  is required for the amendment or repeal of, or the adoption of
any  provision   inconsistent  with,  provisions  of  the  Restated  Certificate
establishing  a classified  Board of Directors.  The vote of holders of at least
662/3% of such Voting Power is required  for the  amendment or repeal of, or the
adoption  of  any  provision  inconsistent  with,  provisions  of  the  Restated
Certificate  authorizing the Preferred Stock,  Common Stock and Nonvoting Common
Stock or specifying the terms of the Common Stock and the Nonvoting Common Stock
(including  any amendment to increase any shares of authorized  capital  stock).
Certain other  provisions also require such a 662/3% vote. See "DGCL and Certain
Provisions of the Restated Certificate and the By-Laws." There are no cumulative
voting rights in the election of the Board of Directors of the Company.

                                       17

     Conversion Provisions. Shares of Nonvoting Common Stock are convertible, at
any time at the option of the holder, on a share-for-share  basis into shares of
Common Stock without the payment of any additional consideration;  provided that
the  conversion  of any  shares of  Nonvoting  Common  Stock by a "bank  holding
company" under the Bank Holding Company Act of 1956, as amended, or an affiliate
thereof  is  prohibited  if the  conversion  of the  total  number  of shares of
Nonvoting  Common Stock held by such holder would cause it to be in violation of
such Act.

     Liquidation  Rights.  Upon  liquidation,  dissolution or winding-up of Iron
Mountain, the holders of Common Stock and Nonvoting Common Stock are entitled to
share ratably  (based on the number of shares held) in all assets  available for
distribution  after  payment  in full of  creditors  and  payment in full to any
holders of Preferred  Stock then  outstanding of any amount  required to be paid
under the terms of such Preferred Stock.

     Other  Provisions.  The  outstanding  shares of Common Stock and  Nonvoting
Common Stock are validly issued,  fully paid and  nonassessable.  In any merger,
consolidation  or  business  combination,  holders of each  class  will  receive
identical consideration,  except that in any such transaction in which shares of
stock are distributed,  such shares may differ as to voting rights to the extent
that voting  rights now differ  between the two  classes.  Neither  class may be
subdivided,   consolidated,    reclassified   or   otherwise   changed   unless,
concurrently,  the other  class is  subdivided,  consolidated,  reclassified  or
otherwise changed in the same proportion and in the same manner.

     The Transfer  Agent and Registrar for the Common Stock is Boston  Equiserve
Limited Partnership,  150 Royall Street, Canton,  Massachusetts 02021 (telephone
number (781) 575-2000).

     The Iron  Mountain  Board has the power to issue shares of  authorized  but
unissued  Common Stock and Nonvoting  Common Stock without  further  stockholder
action.  The holders of Common Stock and Nonvoting Common Stock are not entitled
to preemptive or subscription rights. The issuance of such unissued shares could
have the effect of diluting  the  earnings per share and book value per share of
currently outstanding shares of Common Stock.

Preferred Stock

     The  authorized and unissued  shares of Preferred  Stock may be issued with
such  designations,  preferences,  limitations  and relative  rights as the Iron
Mountain Board may authorize including,  but not limited to: (i) the distinctive
designation  of each series and the number of shares that will  constitute  such
series;  (ii) the voting  rights,  if any, of shares of such  series;  (iii) the
dividend  rate on the shares of such  series,  any  restriction,  limitation  or
condition  upon  the  payment  of such  dividends,  whether  dividends  shall be
cumulative,  and the dates on which  dividends  are payable;  (iv) the prices at
which,  and the terms and conditions on which,  the shares of such series may be
redeemed,  if such  shares are  redeemable;  (v) the  purchase  or sinking  fund
provisions,  if any,  for the purchase or  redemption  of shares of such series;
(vi) any preferential  amount payable upon shares of such series in the event of
the liquidation,  dissolution or winding-up of Iron Mountain or the distribution
of its  assets;  and (vii) the price or rates of  conversion  at which,  and the
terms and  conditions  on which the shares of such series may be converted  into
other securities, if such shares are convertible.  Although Iron Mountain has no
present  intention to issue shares of Preferred Stock, the issuance of Preferred
Stock,  or the issuance of rights to purchase such shares,  could  discourage an
unsolicited  acquisition proposal and the rights of holders of Common Stock will
be subject to, and may be  adversely  affected  by, the rights of holders of any
Preferred Stock that may be issued in the future.

     The following description of the Preferred Stock sets forth certain general
terms and provisions of the Preferred  Stock to which any Prospectus  Supplement
may relate.  The  statements  below  describing  the Preferred  Stock are in all
respects  subject  to and  qualified  in  their  entirety  by  reference  to the
applicable  provisions of the Restated  Certificate  (including  any  applicable
Certificates of Designation) and the By-Laws.

     Reference is made to the  Prospectus  Supplement  relating to the Preferred
Stock offered thereby for specific terms, including:

                                       18

     (1)  the title of such Preferred Stock;

     (2)  the number of shares of such Preferred  Stock offered,  the par value,
          the  liquidation  preference  per share and the offering price of such
          Preferred Stock;

     (3)  the dividend rate(s), period(s) and/or payment date(s) or method(s) of
          calculation thereof applicable to such Preferred Stock;

     (4)  the  date  from  which   dividends  on  such  Preferred   Stock  shall
          accumulate, if applicable;

     (5)  the  procedures  for any auction  and  remarketing,  if any,  for such
          Preferred Stock;

     (6)  the provision for a sinking fund, if any, for such Preferred Stock;

     (7)  the provision for redemption, if applicable, of such Preferred Stock;

     (8)  any listing of such Preferred Stock on any securities exchange;

     (9)  the terms and  conditions,  if  applicable,  upon which such Preferred
          Stock will be convertible  into Common Stock of the Company or another
          series of  Offered  Securities,  including  the  conversion  price (or
          manner of calculation thereof);

     (10) whether  interests  in such  Preferred  Stock will be  represented  by
          Depositary shares as more fully described below under  "Description of
          Depositary Shares;"

     (11) any  other  specific  terms,  preferences,   rights,   limitations  or
          restrictions of such Preferred Stock;

     (12) a discussion of federal income tax  considerations  applicable to such
          Preferred Stock;

     (13) the relative  ranking and  preferences of such  Preferred  Stock as to
          dividend rights and rights upon liquidation, dissolution or winding up
          of the affairs of the Company;

     (14) any  limitations on issuance of any series of Preferred  Stock ranking
          senior to or on a parity  with such  series of  Preferred  Stock as to
          dividend rights and rights upon liquidation, dissolution or winding up
          of the affairs of the Company; and

     (15) any limitations on direct or beneficial  ownership and restrictions on
          transfer.

     As described under "Description of Depositary  Shares," the Company may, at
its option,  elect to offer Depositary  Shares evidenced by depositary  receipts
("Depositary  Receipts"),   each  representing  a  fractional  interest  (to  be
specified in the Prospectus  Supplement relating to the particular series of the
Preferred  Stock) in a share of the  particular  series of the  Preferred  Stock
issued and deposited with a Depositary (as defined below).

Rank

     Unless otherwise determined by the Iron Mountain Board and specified in the
applicable Prospectus Supplement,  it is expected that the Preferred Stock will,
with  respect to dividend  rights and rights upon  liquidation,  dissolution  or
winding  up of the  Company,  rank (i) senior to all  Common  Stock,  and to all
equity securities  ranking junior to such Preferred Stock; (ii) on a parity with
all equity  securities  issued by the  Company  the terms of which  specifically
provide that such equity  securities rank on a parity with the Preferred  Stock;
and (iii)  junior to all equity  securities  issued by the  Company the terms of
which  specifically  provide  that such  equity  securities  rank  senior to the
Preferred Stock.

                                       19

Dividends

     Holders of  Preferred  Stock of each  series  shall be entitled to receive,
when,  as and if  declared  by the Iron  Mountain  Board,  out of  assets of the
Company legally available for payment,  cash dividends at such rates and on such
dates as will be set forth in the applicable  Prospectus  Supplement.  Each such
dividend  shall be  payable  to  holders  of record as they  appear on the stock
transfer  books  of the  Company  (or,  if  applicable,  on the  records  of the
Depositary  referred to below under "Description of Depositary  Shares") on such
record dates as shall be fixed by the Board.

     Dividends  on any  series  of the  Preferred  Stock  may be  cumulative  or
noncumulative,  as provided in the applicable Prospectus Supplement.  Dividends,
if  cumulative,  will be  cumulative  from and  after  the date set forth in the
applicable Prospectus Supplement.  If the Iron Mountain Board fails to declare a
dividend payable on a dividend payment date on any series of the Preferred Stock
for which  dividends are  noncumulative,  then the holders of such series of the
Preferred  Stock  will have no right to  receive a  dividend  in  respect of the
dividend period ending on such dividend  payment date, and the Company will have
no  obligation  to pay the  dividend  accrued  for such  period,  whether or not
dividends on such series are  declared  payable on any future  dividend  payment
date.

     If Preferred Stock of any series are  outstanding,  no full dividends shall
be  declared  or paid or set apart for  payment  on the  Preferred  Stock of the
Company of any other series ranking, as to dividends, on a parity with or junior
to the  Preferred  Stock of such series for any period unless (i) if such series
of Preferred Stock has a cumulative  dividend,  full  cumulative  dividends have
been or contemporaneously are declared and paid or declared and a sum sufficient
for the payment  thereof set apart for such  payment on the  Preferred  Stock of
such series for all past dividend  periods and the then current  dividend period
or (ii) if such series of Preferred  Stock does not have a cumulative  dividend,
full   dividends   for  the  then   current   dividend   period   have  been  or
contemporaneously are declared and paid or declared and a sum sufficient for the
payment  thereof  set  apart for such  payment  on the  Preferred  Stock of such
series.  When  dividends are not paid in full (or a sum sufficient for such full
payment  is not so set  apart)  upon the  Preferred  Stock of any series and the
shares  of any  other  series  of  Preferred  Stock  ranking  on a parity  as to
dividends with the Preferred Stock of such series,  all dividends  declared upon
Preferred  Stock of such series and any other series of Preferred Stock shall in
all cases bear to each other the same ratio that accrued  dividends per share on
the Preferred Stock of such series (which shall not include any  accumulation in
respect of unpaid  dividends for prior dividend  periods if such Preferred Stock
do not have a cumulative dividend) and such other series of Preferred Stock bear
to each  other.  No  interest,  or sum of  money in lieu of  interest,  shall be
payable in respect of any  dividend  payment or payments on  Preferred  Stock of
such series which may be in arrears.

     Except as provided in the immediately  preceding  paragraph,  unless (i) if
such  series of  Preferred  Stock has a  cumulative  dividend,  full  cumulative
dividends on the Preferred  Stock of such series have been or  contemporaneously
are declared and paid or declared and a sum sufficient for the repayment thereof
set  apart  for  payment  for all past  dividend  periods  and the then  current
dividend  period,  and (ii) if such  series of  Preferred  Stock does not have a
cumulative  dividend,  full dividends on the Preferred Stock of such series have
been or contemporaneously are declared and paid or declared and a sum sufficient
for the payment  thereof set apart for  payment  for the then  current  dividend
period,  no dividends (other than in Common Stock or other capital stock ranking
junior  to  the  Preferred  Stock  of  such  series  as to  dividends  and  upon
liquidation)  shall  be  declared  or paid or set  aside  for  payment  or other
distribution  shall be  declared  or made  upon the  Common  Stock or any  other
capital stock of the Company ranking junior to or on a parity with the Preferred
Stock of such series as to dividends or upon  liquidation,  nor shall any Common
Stock or any other capital stock of the Company ranking junior to or on a parity
with the Preferred  Stock of such series as to dividends or upon  liquidation be
redeemed,  purchased or otherwise  acquired for any consideration (or any moneys
be paid to or made available for a sinking fund for the redemption of any shares
of any such stock) by the Company  (except by  conversion  into or exchange  for
other capital stock of the Company ranking junior to the Preferred Stock of such
series as to dividends and upon  liquidation  and except pursuant to certain pro
rata offers to purchase or a concurrent redemption of all, or a pro rata portion
of, the  outstanding  shares of the Preferred Stock of such series and any other
series of Preferred  Stock  ranking on a parity with such series as to dividends
and liquidation).

                                       20

     Any dividend  payment  made on shares of a series of Preferred  Stock shall
first be credited  against the  earliest  accrued but unpaid  dividend  due with
respect to shares of such series which remains payable.

Redemption

     If so provided in the applicable Prospectus Supplement, the Preferred Stock
will be subject  to  mandatory  redemption  or  redemption  at the option of the
Company, as a whole or in part, in each case upon the terms, at the times and at
the redemption prices set forth in such Prospectus Supplement.

     The Prospectus  Supplement  relating to a series of Preferred Stock that is
subject to mandatory  redemption will specify the number of such Preferred Stock
that shall be redeemed by the Company in each year commencing after a date to be
specified,  at a redemption  price per share to be  specified,  together with an
amount equal to all accrued and unpaid  dividends  thereon  (which shall not, if
such Preferred Stock do not have a cumulative dividend, include any accumulation
in  respect  of unpaid  dividends  for prior  dividend  periods)  to the date of
redemption.  The redemption  price may be payable in cash or other property,  as
specified in the applicable Prospectus  Supplement.  If the redemption price for
Preferred  Stock of any  series is  payable  only from the net  proceeds  of the
issuance of capital stock of the Company,  the terms of such Preferred Stock may
provide  that,  if no such capital stock shall have been issued or to the extent
the net proceeds from any issuance are insufficient to pay in full the aggregate
redemption  price  then  due,  such  Preferred  Stock  shall  automatically  and
mandatorily  be converted  into shares of the  applicable  capital  stock of the
Company pursuant to conversion provisions specified in the applicable Prospectus
Supplement.

     Notwithstanding the foregoing, unless (i) if such series of Preferred Stock
has a cumulative dividend, full cumulative dividends on all shares of any series
of Preferred Stock shall have been or contemporaneously are declared and paid or
declared and a sum sufficient for the payment  thereof set apart for payment for
all past dividend periods and the then current dividend period, and (ii) if such
series of Preferred Stock does not have a cumulative dividend, full dividends on
the Preferred  Stock of any series have been or  contemporaneously  are declared
and paid or declared and a sum sufficient for the payment  thereof set apart for
payment for the then current dividend  period,  no shares of any other series of
Preferred Stock ranking, as to dividends and upon liquidation, on parity with or
junior to the  Preferred  Stock of such  series  shall be  redeemed  unless  all
outstanding series of Preferred Stock of such series are simultaneously redeemed
and the Company shall not purchase or otherwise  acquire  directly or indirectly
any Preferred  Stock of such series  (except by conversion  into or exchange for
capital  stock of the  Company  ranking  junior to the  Preferred  Stock of such
series  as to  dividends  and upon  liquidation);  provided,  however,  that the
foregoing  shall not prevent the purchase or acquisition  of Preferred  Stock of
such series  pursuant to a purchase or exchange  offer made on the same terms to
holders of all outstanding Preferred Stock of such series.

     If fewer than all of the  outstanding  Preferred Stock of any series are to
be redeemed,  the number of Preferred Stock to be redeemed will be determined by
the Company and such shares may be redeemed  pro rata from the holders of record
of such shares in  proportion  to the number of such shares held by such holders
(with adjustments to avoid redemption of fractional  shares) or by lot in manner
determined by the Company.

     Notice of  redemption  will be mailed at least 30 days but not more than 60
days before the redemption  date to each holder of record of Preferred  Stock of
any series to be redeemed at the address  shown on the stock  transfer  books of
the Company.  Each notice shall state:  (i) the redemption date; (ii) the number
of shares and series of the Preferred Stock to be redeemed; (iii) the redemption
price; (iv) the place or places where  certificates for such Preferred Stock are
to be surrendered for payment of the redemption price; (v) that dividends on the
shares to be redeemed will cease to accrue on such redemption date; and (vi) the
date upon which the holder's  conversion rights, if any, as to such shares shall
terminate.  If  fewer  than all the  Preferred  Stock  of any  series  are to be
redeemed,  the notice mailed to each such holder  thereof shall also specify the
number of Preferred  Stock to be redeemed  from each such  holder.  If notice of
redemption of any Preferred  Stock has been given and if the funds necessary for
such  redemption  have been set aside by the Company in trust for the benefit of
the holders of any of the Preferred  Stock so called for  redemption,  then from
and after the  redemption  date dividends will cease to accrue on such Preferred
Stock,  and any and all rights of the  holders of such  shares  will  terminate,
except the right to receive the redemption price.

                                       21

Liquidation Preference

     Upon any voluntary or involuntary liquidation, dissolution or winding up of
the affairs of the Company,  then,  before any  distribution or payment shall be
made to the holders of any Common  Stock or any other class or series of capital
stock of the  Company  ranking  junior  to a series  of  Preferred  Stock in the
distribution  of assets upon any  liquidation,  dissolution or winding up of the
Company,  the  holders of such  series of  Preferred  Stock shall be entitled to
receive out of assets of the  Company  legally  available  for  distribution  to
shareholders  liquidating   distributions  in  the  amount  of  the  liquidation
preference per share (set forth in the applicable Prospectus  Supplement),  plus
an amount equal to all  dividends  accrued and unpaid  thereon  (which shall not
include  any  accumulation  in respect of unpaid  dividends  for prior  dividend
periods  if such  Preferred  Stock do not  have a  cumulative  dividend).  After
payment of the full amount of the  liquidating  distributions  to which they are
entitled,  the holders of Preferred  Stock will have no right or claim to any of
the remaining  assets of the Company.  In the event that upon any such voluntary
or involuntary  liquidation,  dissolution or winding up, the available assets of
the Company are insufficient to pay the amount of the liquidating  distributions
on all outstanding  shares of a series of Preferred Stock and the  corresponding
amounts payable on all shares of other classes or series of capital stock of the
Company  ranking  on a  parity  with  such  series  of  Preferred  Stock  in the
distribution  of assets  (including,  if  applicable,  other series of Preferred
Stock),  then the holders of such series of  Preferred  Stock and all other such
classes or series of capital stock shall share ratably in any such  distribution
of assets in  proportion  to the full  liquidating  distributions  to which they
would otherwise be respectively entitled.

     If liquidating distributions shall have been made in full to all holders of
Preferred Stock, the remaining assets of the Company shall be distributed  among
the holders of any other classes or series of capital  stock  ranking  junior to
the Preferred Stock upon  liquidation,  dissolution or winding up,  according to
their  respective  rights and  preferences  and in each case  according to their
respective number of shares.  For such purposes,  the consolidation or merger of
the Company with or into any other trust or corporation,  or the sale,  lease or
conveyance  of all or  substantially  all of the  property  or  business  of the
Company, shall not be deemed to constitute a liquidation, dissolution or winding
up of the Company.

Voting Rights

     Holders of the Preferred  Stock will not have any voting rights,  except as
set  forth  below  or as  otherwise  from  time  to time  required  by law or as
indicated in the applicable Prospectus Supplement.

     Unless otherwise  specified in the related  Prospectus  Supplement,  at any
time dividends on any Preferred Stock shall be in arrears for a specified number
of consecutive  quarterly  periods,  the holders of such Preferred Stock and any
other  series of  Preferred  Stock  upon  which  like  voting  rights  have been
conferred and are exercisable (voting separately as a class) will be entitled to
vote for the  election of two  additional  directors  of the Company at the next
annual meeting of shareholders and at each subsequent  meeting until (i) if such
series of Preferred Stock has a cumulative dividend,  all dividends  accumulated
on such  Preferred  Stock for the past  dividend  periods  and the then  current
dividend  period shall have been fully paid or declared and a sum sufficient for
the payment  thereof  set aside for payment or (ii) if such series of  Preferred
Stock does not have a cumulative dividend,  four consecutive quarterly dividends
shall have been fully paid or  declared  and a sum  sufficient  for the  payment
thereof set aside for payment.

     Unless otherwise specified in the applicable Prospectus Supplement, so long
as any Preferred Stock remain  outstanding,  the Company shall not,  without the
affirmative  vote or  consent of the  holders  of a majority  of the shares of a
series of Preferred  Stock  outstanding at the time that is adversely  affected,
given in person or by proxy,  either in  writing  or at a meeting  (such  series
voting  separately  as a class),  (i)  authorize  or  create,  or  increase  the
authorized  or issued  amount of, any class or series of capital  stock  ranking
prior to such series of Preferred  Stock with respect to payment of dividends or
the  distribution  of assets  upon  liquidation,  dissolution  or winding up, or
reclassify any authorized  capital stock of the Company into any such shares, or
create,  authorize  or issue any  obligation  or  security  convertible  into or
evidencing the right to purchase any such shares; or (ii) amend, alter or repeal
the provisions of the  certificate  of designation  for such series of Preferred
Stock,  whether by merger,  consolidation or otherwise,  so 

                                       22


as to materially and adversely affect any right, preference, privilege or voting
power of such  series  of  Preferred  Stock or the  holders  thereof;  provided,
however,  that any increase in the amount of the authorized  Preferred  Stock or
the creation or issuance of any other series of Preferred Stock, or any increase
in the  amount  of  authorized  shares of such  series  or any  other  series of
Preferred  Stock,  in each  case  ranking  on a  parity  with or  junior  to the
Preferred  Stock of such  series  with  respect to payment of  dividends  or the
distribution of assets upon liquidation, dissolution or winding up, shall not be
deemed to materially and adversely affect such rights,  preferences,  privileges
or voting powers.

     The foregoing voting  provisions will not apply if, at or prior to the time
when the act with respect to which such vote would  otherwise be required  shall
be effected, all outstanding shares of such series of Preferred Stock shall have
been  redeemed or called for  redemption  and  sufficient  funds shall have been
deposited in trust to effect such redemption.

     As more fully described under  "Description of Depositary Shares" below, if
the Company elects to issue Depositary  Shares,  each representing a fraction of
share of a series of the Preferred  Stock,  each such Depositary will, in effect
be entitled to such fraction of a vote per Depositary Share.

Conversion Rights

     The  terms and  conditions,  if any,  upon  which  shares of any  series of
Preferred  Stock may be converted  into or exchanged for Common Stock or another
series of  Preferred  Stock or other  series of Offered  Securities  will be set
forth in the Prospectus Supplement relating thereto. Such terms will include the
number of Common Stock or other  securities  into which the  Preferred  Share is
convertible  or  exchangeable,  conversion  or  exchange  price  (or  manner  of
calculation  thereof),  the  conversion  or exchange  period,  provisions  as to
whether  conversion  or  exchange  will be at the  option of the  holders of the
Preferred  Stock or the  Company,  the events  requiring  an  adjustment  of the
conversion or exchange price and provisions  affecting conversion or exchange in
the event of the redemption such Preferred Stock.

                        DESCRIPTION OF DEPOSITARY SHARES

General

     The description set forth below and in any applicable Prospectus Supplement
of certain  provisions of any Deposit  Agreement  (as defined  below) and of the
Depositary  Shares  and  depositary  receipts  representing   Depositary  Shares
("Depositary  Receipts")  does not purport to be complete  and is subject to and
qualified in its entirety by  reference  to the forms of Deposit  Agreement  and
Depositary  Receipts  relating to each series of the Preferred  Stock which have
been or will be  filed  with  the  Commission  at or  prior  to the  time of the
offering of such series of the Preferred Stock.

     The Company  may, at its option,  elect to offer  fractional  interests  in
shares of Preferred  Stock,  rather than shares of Preferred Stock. In the event
such  option is  exercised,  the  Company  will  provide  for the  issuance by a
Depositary  (as defined  below) to the public of  Depositary  Receipts,  each of
which will  represent a  fractional  interest to be set forth in the  Prospectus
Supplement  relating to a particular series of the Preferred Stock which will be
filed with the Commission at or prior to the time of the offering of such series
of the  Preferred  Stock as  described  below.  Preferred  Stock of each  series
represented  by  Depositary  Shares will be deposited  under a separate  deposit
agreement  (each,  a "Deposit  Agreement")  among the Company and the depositary
named therein (a "Depositary").  The Prospectus  Supplement relating to a series
of  Depositary  Shares  will set forth the name and  address of the  Depositary.
Subject  to the  terms of the  applicable  Deposit  Agreement,  each  owner of a
Depositary Share will be entitled, in proportion to the fractional interest of a
share of a particular  series of Preferred Stock  represented by such Depositary
Share to all the rights and  preferences of the Preferred  Stock  represented by
such Depositary Shares (including dividend, voting,  conversion,  redemption and
liquidation rights).

                                       23

     The  Depositary  Shares will be evidenced  by  Depositary  Receipts  issued
pursuant to the  applicable  Deposit  Agreement.  Upon  surrender of  Depositary
Receipts  at the  office  of the  Depositary  and upon  payment  of the  charges
provided in the Deposit Agreement and subject to the terms thereof,  a holder of
Depositary Shares is entitled to have the Depositary  deliver to such holder the
shares of Preferred  Stock  underlying  the Depositary  Shares  evidenced by the
surrendered Depositary Receipts.

Dividends and Other Distributions

     A Depositary  will be required to  distribute  all cash  dividends or other
cash distributions  received in respect of the applicable Preferred Stock to the
record holders of Depositary  Receipts  evidencing the related Depositary Shares
in proportion to the number of such  Depositary  Receipts owned by such holders,
subject to certain obligations of holders to file proofs, certificates and other
information  and to  pay  certain  charges  and  expenses  to  such  Depositary.
Fractions will be rounded down to the market whole cent.

     In the event of a  distribution  other than in cash, a  Depositary  will be
required  to  distribute  property  received  by it to  the  record  holders  of
Depositary Receipts entitled thereto,  subject to certain obligations of holders
to file proofs,  certificates  and other  information and to pay certain charges
and expenses to such  Depositary,  unless such Depositary  determines that it is
not feasible to make such distribution,  in which case such Depositary may, with
the approval of the Company,  sell such property and distribute the net proceeds
from such sale to such holders.

     No  distributions  will be made in respect of any  Depositary  Share to the
extent that it  represents  any  Preferred  Stock which have been  converted  or
exchanged.  The Deposit Agreement will also contain  provisions  relating to the
manner in which any  subscription  or similar  rights  offered by the Company to
holders of the Preferred  Stock shall be made available to holders of Depositary
Shares.

Redemption of Depositary Shares

     If a series of the Preferred  Stock  underlying  the  Depositary  Shares is
subject to redemption,  the Depositary Shares will be redeemed from the proceeds
received by the Depositary  resulting from the redemption,  in whole or in part,
of such series of the Preferred  Stock held by the  Depositary.  The  Depositary
shall mail notice of redemption not less than 30 and not more than 60 days prior
to the date  fixed  for  redemption  to the  record  holders  of the  Depositary
Receipts  evidencing the Depositary Shares to be so redeemed at their respective
addresses  appearing  in  the  Depositary's  books.  The  redemption  price  per
Depositary  Share will be equal to the  applicable  fraction  of the  redemption
price per share  payable  with  respect to such series of the  Preferred  Stock.
Whenever the Company  redeems shares of Preferred  Stock held by the Depositary,
the  Depositary  will  redeem  as of the  same  redemption  date the  number  of
Depositary  Shares  relating to shares of Preferred  Stock so redeemed.  If less
than all of the Depositary  Shares are to be redeemed,  the Depositary Shares to
be  redeemed  will be selected  by lot or pro rata as may be  determined  by the
Depositary.

     After the date fixed for  redemption,  the Depositary  Shares so called for
redemption  will no longer be deemed  to be  outstanding  and all  rights of the
holders of the Depositary Shares and the related Depositary Receipts will cease,
except the right to receive  the moneys  payable  upon such  redemption  and any
money or other  property  to which the  holders of such  Depositary  Shares were
entitled upon such redemption upon surrender to the Depositary of the Depositary
Receipts evidencing such Depositary Shares.

Voting of the Preferred Stock

     Upon  receipt  of  notice  of any  meeting  at  which  the  holders  of the
applicable  Preferred  Stock are entitled to vote, a Depositary will be required
to mail the  information  contained  in such  notice of  meeting  to the  record
holders of the  Depositary  Receipts  evidencing  the  Depositary  Shares  which
represent  such  Preferred  Stock.  Each record  holder of  Depositary  Receipts
evidencing  Depositary Shares on the record date (which will be the same date as
the record date for the  Preferred  Stock)  will be  entitled  to instruct  such
Depositary as to the exercise of the voting rights

                                       24


pertaining  to the  amount  of  Preferred  Stock  represented  by such  holder's
Depositary Shares. Such Depositary will endeavor,  insofar as practical, to vote
the  amount  of  Preferred  Stock  represented  by  such  Depositary  Shares  in
accordance  with  such  instructions,  and the  Company  will  agree to take all
reasonable  action which may be deemed  necessary by such Depositary in order to
enable such  Depositary  to do so. Such  Depositary  will be required to abstain
from voting the amount of Preferred Stock  represented by such Depositary Shares
to the extent it does not  receive  specific  instructions  from the  holders of
Depositary  Receipts  evidencing such Depositary Shares. The Depositary will not
be responsible  for any failure to carry out any instruction to vote, or for the
manner or effect of any such vote made,  as long as such action or non-action is
in good faith and does not result from gross negligence or willful misconduct of
such Depositary.

Liquidation Preference

     In the event of the liquidation,  dissolution or winding up of the Company,
whether  voluntary or involuntary,  the holders of each Depositary Share will be
entitled to the fraction of the  liquidation  preference  accorded each share of
Preferred  Stock  represented  by such  Depositary  Share,  as set  forth in the
applicable Prospectus Supplement.

Conversion of Preferred Stock

     The  Depositary   Shares,   as  such,  will  not  be  convertible  into  or
exchangeable  for  Common  Stock,  Preferred  Stock or any other  securities  or
property  of the  Company.  Nevertheless,  if so  specified  in  the  applicable
Prospectus  Supplement  relating  to  an  offering  of  Depositary  Shares,  the
Depositary  Receipts may be  surrendered  by holders  thereof to the  applicable
Depositary with written  instructions to such Depositary to instruct the Company
to cause  conversion  or  exchange of the  Preferred  Stock  represented  by the
Depositary Share evidenced by such Depositary  Receipts into Common Stock, other
shares of Preferred  Stock of the Company or such other  Offered  Securities  as
shall be provided therein,  and the Company will agree that upon receipt of such
instruction  and any  amounts  payable  in  respect  thereof,  it will cause the
conversion or exchange  thereof  utilizing the same procedures as those provided
for delivery of Preferred  Stock to effect such  conversion or exchange.  If the
Depositary Shares evidenced by a Depositary  Receipt are to be converted in part
only, a new  Depositary  Receipt or  Depositary  Receipts will be issued for any
Depositary Shares not to be converted.

Amendment and Termination of a Deposit Agreement

     Any  form  of  Depositary  Receipt  evidencing  Depositary  Shares  and any
provision of a Deposit  Agreement will be permitted at any time to be amended by
agreement  between the  Company  and the  applicable  Depositary.  However,  any
amendment  that  materially  and  adversely  alters the rights of the holders of
Depositary  Shares will not be effective unless such amendment has been approved
by the  existing  holders of at least a majority  of the  applicable  Depositary
Shares then outstanding.  Every holder of an outstanding  Depositary  Receipt at
the time any such amendment  becomes effective shall be deemed, by continuing to
hold such Depositary  Receipt,  to consent and agree to such amendment and to be
bound by the applicable Deposit Agreement as amended thereby.

     Any Deposit  Agreement  may be terminated by the Company upon not less than
30 days' prior written notice to the applicable Depositary if a majority of each
series  of  Preferred  Stock  affected  by  such  termination  consents  to such
termination,  whereupon  such  Depositary  will be  required  to deliver or make
available  to  each  holder  of  Depositary  Receipts,  upon  surrender  of  the
Depositary  Receipts  held by such  holder,  such number of whole or  fractional
Preferred  Stock as are represented by the Depositary  Shares  evidenced by such
Depositary  Receipts  together with any other  property held by such  Depositary
with respect to such Depositary Receipts.  In addition, a Deposit Agreement will
automatically  terminate if (i) all  outstanding  Depositary  Shares  thereunder
shall have been  redeemed;  (ii) there shall have been a final  distribution  in
respect of the  related  Preferred  Stock in  connection  with any  liquidation,
dissolution or winding up of the Company and such  distribution  shall have been
distributed  to the holders of Depositary  Receipts  evidencing  the  Depositary
Shares  underlying such Preferred Stock; or (iii) each of the related  Preferred
Stock shall have been converted or exchanged into  securities not so represented
by Depositary Shares.

                                       25

Charges of a Depositary

     The Company will pay all transfer and other taxes and governmental  charges
arising  solely from the  existence of a Deposit  Agreement.  In  addition,  the
Company will pay the fees and expenses of a Depositary  in  connection  with the
initial  deposit of the Preferred  Stock and any redemption of Preferred  Stock.
However,  holders  of  Depositary  Receipts  will  pay  any  transfer  or  other
governmental  charges and the fees and expenses of a  Depositary  for any duties
requested by such holders to be performed  which are outside of those  expressly
provided for in the applicable Deposit Agreement.

Resignation and Removal of Depositary

     A Depositary  may resign at any time by delivering to the Company notice of
its election to do so, and the Company may at any time remove a Depositary,  any
such  resignation or removal to take effect upon the  appointment of a successor
Depositary.  A successor  Depositary will be required to be appointed  within 60
days after delivery of the notice of resignation or removal and will be required
to be a bank or trust company  having its principal  office in the United States
and having a combined capital and surplus of at least $50 million.

Miscellaneous

     A Depositary will be required to forward to holders of Depositary  Receipts
any  reports and  communications  from the  Company  which are  received by such
Depositary with respect to the related Preferred Stock.

     Neither  Depositary  nor the Company will be liable if it is prevented from
or delayed in, by law or any  circumstances  beyond its control,  performing its
obligations  under a Deposit  Agreement.  The  obligations  of the Company and a
Depositary under a Deposit  Agreement will be limited to performing their duties
thereunder in good faith and without gross negligence or willful misconduct, and
neither the Company nor any applicable Depositary will be obligated to prosecute
or defend any legal proceeding in respect of any Depositary Receipts, Depositary
Shares or Preferred Stock represented thereby unless  satisfactory  indemnity is
furnished.  The Company and any Depositary  will be permitted to rely on written
advice of counsel or accountants,  on information provided by persons presenting
Preferred Stock represented thereby for deposit,  holders of Depositary Receipts
or  other  persons  believed  in  good  faith  to  be  competent  to  give  such
information, and on documents believed in good faith to be genuine and signed by
a proper party.

     In the event a Depositary  shall receive  conflicting  claims,  requests or
instructions from any holders of Depositary  Receipts,  on the one hand, and the
Company,  on the other hand,  such  Depositary  shall be entitled to act on such
claims, requests or instructions received from the Company.

                             DESCRIPTION OF WARRANTS

     The Company may issue, together with any other series of Offered Securities
or  separately,  Warrants  entitling  the holder to purchase from or sell to the
Company,  or to receive from the Company the cash value of the right to purchase
or sell, Debt Securities,  Preferred Stock,  Depositary  Shares or Common Stock.
Any  Warrants  will  be  issued  under  Warrant   Agreements  (each  a  "Warrant
Agreement")  to be entered  into  between the  Company and a warrant  agent (the
"Warrant  Agent"),  all as set  forth in the  applicable  Prospectus  Supplement
relating to the particular issue of Warrants.

     In  the  case  of  each  series  of  Warrants,  the  applicable  Prospectus
Supplement  will  describe  the terms of the  Warrants  being  offered  thereby,
including  the  following,  if  applicable:  (i) the  offering  price;  (ii) the
currencies  in which  such  Warrants  are being  offered;  (iii)  the  number of
Warrants offered; (iv) the securities underlying the Warrants;  (v) the exercise
price,  the  procedures for exercise of the Warrants and the  circumstances,  if
any,  that will cause the Warrants to be deemed to be  automatically  exercised;
(vi) the date on which the right shall  expire;  (vii) U.S.  federal  income tax
consequences; and (viii) other terms of the Warrants.

                                       26

     Warrants may be exercised at the appropriate office of the Warrant Agent or
any other office indicated in the applicable Prospectus Supplement. Prior to the
exercise of Warrants entitling the holder to purchase any securities, holders of
such  Warrants  will not have any of the  rights of  holders  of the  securities
purchasable  upon such  exercise  and will not be entitled  to payments  made to
holders of such securities.

     The Warrant  Agreements may be amended or supplemented  without the consent
of the holders of the Warrants issued  thereunder to effect changes that are not
inconsistent  with the  provisions  of the  Warrants  and that do not  adversely
affect the interests of the holders of the Warrants.

             DGCL AND CERTAIN PROVISIONS OF THE RESTATED CERTIFICATE
                                 AND THE BY-LAWS

     The Restated  Certificate and the By-Laws  contain certain  provisions that
could delay or make more difficult the  acquisition of Iron Mountain by means of
a tender offer,  a proxy contest or otherwise.  These  provisions,  as described
below, are expected to discourage  certain types of coercive takeover  practices
and inadequate takeover bids and to encourage persons seeking to acquire control
of Iron Mountain first to negotiate with Iron Mountain.  Iron Mountain  believes
that the benefits of increased  protection of its ability to negotiate  with the
proponent of an unfriendly  or  unsolicited  proposal to acquire or  restructure
Iron Mountain outweigh the disadvantages of discouraging such proposals because,
among other things,  negotiations with respect to such proposals could result in
an improvement of their terms.

Classified Board of Directors

     The Restated  Certificate  and the By-Laws provide for a Board of Directors
that is divided into three  classes of  Directors,  as nearly equal in number as
possible,  with the term of each class expiring in a different year. The By-Laws
provide that the number of Directors will be fixed from time to time exclusively
by the Iron Mountain Board,  but shall consist of not more than 15 nor less than
three  Directors.  The  classified  Iron  Mountain  Board is intended to promote
continuity  and stability of Iron  Mountain's  management  and policies  since a
majority  of the  Directors  at any given  time will have  prior  experience  as
Directors of Iron Mountain. Such continuity and stability facilitates long-range
planning of Iron  Mountain's  business  and ensures the quality of its  business
operations.  The  classification  of Directors  has the effect of making it more
difficult to change the  composition  of the Iron Mountain  Board.  At least two
annual  stockholder  meetings,  instead of one,  would be  required  to effect a
change in the majority  control of the Iron Mountain Board,  except in the event
of vacancies  resulting from removal (in which case the remaining Directors will
fill the vacancies so created).  See "--Removal of Directors;  Filling Vacancies
on the Iron Mountain Board."

Removal of Directors; Filling Vacancies on the Iron Mountain Board

     The Restated  Certificate  and Iron Mountain  By-Laws  provide that an Iron
Mountain  Director may be removed by the stockholders only for cause at any time
during such Director's  term of office by affirmative  vote of the holders of at
least 80% of the Voting Power.

     The By-Laws and the Restated Certificate both provide that a vacancy on the
Iron Mountain  Board,  including a vacancy created by an increase in the size of
the Iron  Mountain  Board by the  Directors,  may be filled by a majority of the
remaining Directors or by a sole remaining Director,  or if no Directors remain,
then by the  stockholders.  The  Restated  Certificate  also  provides  that any
Director  elected by the Iron Mountain  Board to replace  another  Director of a
given class of Directors  will hold office until the next election of such class
of  Directors.  These  provisions  are to  ensure  that a third  party  would be
precluded from removing incumbent  Directors and simultaneously  gaining control
of the Iron Mountain Board by filling the vacancies created by such removal with
its own nominees.  Moreover, even if the holders of the outstanding Common Stock
were to vote to remove Directors for cause,  only the remaining  Directors would
have the power to fill the vacancies  created by such removal,  unless such vote
provided for the removal of the entire Iron Mountain Board for cause.

                                       27

Amendment of Certain Provisions of the Restated Certificate and the By-Laws

     The Restated  Certificate and the By-Laws contain provisions  requiring the
affirmative  vote of the holders of at least 662/3% of the Voting Power to amend
certain   provisions  of  the  Restated   Certificate  and  the  By-Laws.   This
supermajority  voting  provision  also  applies  to (i)  the  provisions  of the
Restated Certificate authorizing Iron Mountain to release its Directors from any
liability  for  monetary  damages as a result of any  breach of their  fiduciary
duties,  with certain  exceptions  mandated by the DGCL, and (ii) the provisions
allowing for the indemnification of officers and Directors of Iron Mountain. The
Restated Certificate provides that the By-Laws may be amended only by a majority
of the full Iron Mountain Board or by the  stockholders  holding at least 662/3%
of the Voting  Power.  The DGCL  provides  that  by-laws may not be amended by a
corporation's  Board  of  Directors  unless  the  corporation's  certificate  of
incorporation  expressly  authorizes  such amendments by the Board of Directors;
the  Restated  Certificate  includes  such  a  provision.   Under  the  Restated
Certificate,  at least 80% of the Voting Power is required to approve amendments
to  those  provisions  of the  Restated  Certificate  or Iron  Mountain  By-Laws
establishing a classified Board,  specifying notice requirements for stockholder
nominations  of Directors or business to be brought by a  stockholder  before an
annual meeting and limiting the rights of  stockholders  to remove  Directors or
fill vacancies on the Iron Mountain Board, to call special meetings or to effect
actions by written consent.

Stockholder Actions and Meetings

     Iron Mountain's Restated  Certificate  provides that stockholder action may
be taken only at an annual or  special  meeting of  stockholders  and  prohibits
stockholders  action by  written  consent  in lieu of a  meeting.  The  Restated
Certificate  and  Iron  Mountain   By-Laws  provide  that  special  meetings  of
stockholders can be called by the Chairman of the Board of Directors, if any, or
the Iron Mountain Board  pursuant to a resolution  approved by a majority of the
members of the Iron Mountain  Board.  The business  permitted to be conducted at
any special meeting of  stockholders  is limited to the business  brought before
the meeting by the Iron Mountain  Board.  The ByLaws set forth an advance notice
procedure  with regard to the  nomination,  other than by or at the direction of
the Iron Mountain Board, of candidates for election as directors and with regard
to business brought before an annual meeting of stockholders of Iron Mountain.

Delaware Anti-Takeover Statute

     Subject to certain  exceptions set forth  therein,  Section 203 of the DGCL
provides that a corporation  shall not engage in any business  combination  with
any "interested  stockholder"  for a three-year  period  following the date that
such  stockholder  becomes an  interested  stockholder  unless (i) prior to such
date,  the board of directors of the  corporation  approved  either the business
combination  or the  transaction  that resulted in the  stockholder  becoming an
interested stockholder,  (ii) upon consummation of the transaction that resulted
in  the  stockholder   becoming  an  interested   stockholder,   the  interested
stockholder  owned  at  least  85%  of  the  voting  stock  of  the  corporation
outstanding at the time the transaction  commenced (excluding certain shares) or
(iii) on or subsequent to such date, the business combination is approved by the
board of directors of the corporation  and by the  affirmative  vote of at least
662/3% of the  outstanding  voting  stock  which is not owned by the  interested
stockholder.  Except as specified therein, an interested  stockholder is defined
to mean  any  person  that (a) is the  owner  of 15% or more of the  outstanding
voting  stock of the  corporation  or (b) is an  affiliate  or  associate of the
corporation and was the owner of 15% or more of the outstanding  voting stock of
the corporation at any time within three years immediately prior to the relevant
date, or any affiliate or associate of such person  referred to in (a) or (b) of
this  sentence.  Under certain  circumstances,  Section 203 of the DGCL makes it
more  difficult  for  an  interested  stockholder  to  effect  various  business
combinations  with  a  corporation  for  a  three-year   period,   although  the
stockholders may, by adopting an amendment to the  corporation's  certificate of
incorporation  or by-laws,  elect not to be governed by this section,  effective
twelve months after  adoption.  The Restated  Certificate and the By-Laws do not
exclude Iron  Mountain  from the  restrictions  imposed under Section 203 of the
DGCL.  It is  anticipated  that the  provisions  of Section  203 of the DGCL may
encourage  companies  interested  in  acquiring  Iron  Mountain to  negotiate in
advance with the Iron Mountain Board.

                                       28

                           DESCRIPTION OF INDEBTEDNESS

     The  summaries  contained  herein of  certain of the  indebtedness  of Iron
Mountain do not purport to be complete and are  qualified  in their  entirety by
reference to the provisions of the various  agreements  and  indentures  related
thereto, which are filed as exhibits to the Registration Statement of which this
Prospectus is a part and to which reference is hereby made.

Credit Agreement

     The Credit Agreement, as currently in effect, is a $250.0 million revolving
credit  facility  that  matures  on  September  30,  2002.  Upon  maturity,  all
outstanding  revolving  credit loans and other amounts  payable  thereunder will
become due.

     Borrowings  under the  Credit  Agreement  may be used to  finance  possible
future  acquisitions,  as well as for  working  capital  and  general  corporate
purposes. The Company's obligations under the Credit Agreement are guaranteed by
substantially all of Iron Mountain's  subsidiaries and are secured by the pledge
of the stock of such  subsidiaries.  Prepayment of outstanding  borrowings under
the Credit Agreement are required in certain  circumstances  out of the proceeds
of certain  insurance  payments,  condemnations,  issuances of indebtedness  and
asset dispositions.

     The Credit Agreement  permits the Company to elect interest rates from time
to time, as to all or a portion of the borrowings made  thereunder,  at interest
rates based upon the  applicable  reference  rate and margin or spread over such
reference  rate  (which  spread  varies  based  upon the ratio of the  Company's
indebtedness  to EBITDA).  The reference rate, at the Company's  option,  may be
based upon (i) a fluctuating rate of interest equal to the higher rates, or (ii)
for interest  periods of 1, 2, 3, 6 or (if  available)  12 months,  the interest
rates prevailing on the date of determination  for the selected  interest period
in the London interbank market.

     The Credit  Agreement  contains  covenants  restricting the ability of Iron
Mountain and its subsidiaries to, among other things:  (i) declare  dividends or
redeem  or  repurchase   capital   stock;   (ii)  make  optional   payments  and
modifications of subordinated and other debt instruments;  (iii) incur liens and
engage in sale and leaseback transactions;  (iv) make loans and investments; (v)
incur indebtedness and contingent  obligations;  (vi) make capital expenditures;
(vii)  engage in  mergers,  acquisitions  and assets  sales;  (viii)  enter into
transactions with affiliates;  and (ix) make changes in their lines of business.
Iron Mountain is also required to comply with  financial  covenants with respect
to: (i) a maximum leverage ratio;  (ii) a minimum  interest  coverage ratio; and
(iii) a minimum fixed charge coverage ratio.  The Credit Agreement also contains
customary affirmative covenants and events of default.

The Senior Subordinated Notes

     In October 1996, the Company issued $165.0 million  principal amount of the
1996 Notes,  and in October 1997, the Company  issued $250.0  million  principal
amount of the 1997  Notes.  The 1996 Notes  mature on October 1, 2006,  and bear
interest  at a rate of 10 1/8% per annum,  payable  semi-annually  in arrears on
April 1 and October 1. The 1997 Notes  mature on September  30,  2009,  and bear
interest  at a rate of 8 3/4% per  annum,  payable  semi-annually  in arrears on
March 31 and  September  30. Both the 1996 Notes and the 1997 Notes are general,
unsecured obligations of the Company, subordinated in right of payment to senior
indebtedness  of  the  Company,  and  are  guaranteed  on an  unsecured,  senior
subordinated and joint and several basis by  substantially  all of the Company's
present and future subsidiaries.

     Each of the Notes Indentures provides that the Company may redeem up to 35%
of  the  initial  principal  amount  of the  1996  Notes  and  the  1997  Notes,
respectively,  for a period of 36 months after the date of issuance with the net
proceeds of one or more equity offerings,  whether such offerings are registered
pursuant  to the  Securities  Act or not  (unless  such  equity  securities  are
redeemable  prior to the  maturity of the 1996 Notes or the 1997  Notes,  as the

                                       29

case maybe).  In such event,  the  redemption  price for the 1996 Notes would be
109.125%,  and the redemption price for the 1997 Notes would be 108.75%,  of the
aggregate principal amount plus, in each case, accrued and unpaid interest. Each
of the Notes Indentures also provides that the Company must  repurchase,  at the
option of the holders, the 1996 Notes and the 1997 Notes, respectively,  at 100%
of their principal amount, plus accrued and unpaid interest, upon the occurrence
of a "Change of Control," as defined  therein.  Except for required  repurchases
upon the  occurrence  of a change of control  or in the event of  certain  asset
sales,  each as  described  in the  respective  Indenture,  the  Company  is not
required to make sinking fund or  redemption  payments  with respect to the 1996
Notes or the 1997 Notes.  The 1996 Notes become  redeemable at the option of the
Company at stated  premiums  commencing  October 1, 2001.  The 1997 Notes become
redeemable at the option of the Company at stated premiums commencing  September
30, 2002. Prior to September 30, 2002, the 1997 Notes are also redeemable at the
option of the Company, in whole or in part, at a specified make-whole price.

     The Notes Indentures contain covenants  restricting or limiting the ability
of the Company and its subsidiaries to, among other things: (i) incur additional
indebtedness,  including  indebtedness  ranking senior to the 1996 Notes and the
1997 Notes and junior to any senior  indebtedness;  (ii) pay  dividends  or make
other restricted payments; (iii) make asset dispositions; (iv) permit liens; (v)
enter into sale and  leaseback  transactions;  (vi) enter into certain  mergers;
(vii) make certain investments;  and (viii) enter into transactions with related
persons.

                              PLAN OF DISTRIBUTION

     The Company may sell the Offered Securities to one or more underwriters for
public offering and sale by them or may sell the Offered Securities to investors
directly or through agents.  Any such underwriter or agent involved in the offer
and sale of the Offered  Securities  will be named in the applicable  Prospectus
Supplement.

     The distribution of Offered Securities may be effected from time to time in
one or more  transactions at a fixed price or prices,  which may be changed,  at
market prices  prevailing at the time of sale, at prices  related to such market
prices  or at  negotiated  prices.  In  connection  with  the  sale  of  Offered
Securities,  underwriters  or agents may  receive or be deemed to have  received
compensation  from the Company or from  purchasers  in the form of  underwriting
discounts, concessions or commissions.  Underwriters may sell Offered Securities
to or through dealers,  and such dealers may receive compensation in the form of
discounts, concessions or commissions from the underwriters or from purchasers.

     Any underwriting compensation paid by the Company to underwriters or agents
in  connection  with the  offering  of Offered  Securities,  and any  discounts,
concessions or commissions  allowed by  underwriters to  participating  dealers,
will be set forth in the applicable Prospectus Supplement. Underwriters, dealers
and agents  participating in the  distribution of the Offered  Securities may be
deemed  to be  underwriters,  and any  discounts,  concessions  and  commissions
received  by them and any  profit  realized  by them on  resale  of the  Offered
Securities may be deemed to be underwriting discounts and commissions, under the
Securities  Act.  Underwriters,  dealers  and  agents  may  be  entitled,  under
agreements  entered  into  with the  Company,  to  indemnification  against  and
contribution toward certain civil liabilities,  including  liabilities under the
Securities Act.

     If so indicated in the applicable Prospectus  Supplement,  the Company will
authorize  underwriters  or other  persons  acting  as the  Company's  agents to
solicit offers by certain  institutions to purchase Offered  Securities from the
Company at the public  offering  price set forth in such  Prospectus  Supplement
pursuant to  contracts  providing  for payment and  delivery on a future date or
dates.  Institutions  with whom such  contracts,  when  authorized,  may be made
include  commercial  and savings  banks,  insurance  companies,  pension  funds,
investment  companies,   educational  and  charitable  institutions,  and  other
institutions,  but will in all cases be subject to the  approval of the Company.
Any such  contracts  will be subject to the  condition  that the  purchase by an
institution of the Offered  Securities covered by its contracts shall not at the
time of delivery be prohibited  under the law of any  jurisdiction in the United
States to which such  institution  is subject  and,  if a portion of the Offered
Securities is being sold to  underwriters,  may be subject to the condition that
the Company shall have sold to such underwriters the Offered Securities not sold
for delayed

                                       30

delivery.   The   underwriters   and  such  other  persons  will  not  have  any
responsibility in respect of the validity or performance of such contracts.

     Unless  otherwise  specified  in the related  Prospectus  Supplement,  each
series of Offered  Securities  will be a new issue with no  established  trading
market,  other  than  shares of Common  Stock,  which are  listed on the  Nasdaq
National  Market.  Any shares of Common  Stock  sold  pursuant  to a  Prospectus
Supplement will be listed on the Nasdaq National  Market.  The Company may elect
to list any other  series  of  Offered  Securities  on an  exchange,  but is not
obligated to do so. Any underwriters to whom Offered  Securities are sold by the
Company  for  public  offering  and  sale  may  make a  market  in such  Offered
Securities,  but  such  underwriters  will  not be  obligated  to do so and  may
discontinue  any market making at any time without  notice.  No assurance can be
given as to the liquidity of or the trading markets for any Offered Securities.

     Certain of the  underwriters  and their  affiliates  may be  customers  of,
engage  in  transactions  with and  perform  services  for the  Company  and its
subsidiaries in the ordinary course of business.

     The specific terms and manner of sale of the Offered Securities will be set
forth or summarized in the applicable Prospectus Supplement.

                                  LEGAL MATTERS

     Certain legal matters with respect to the Offered Securities offered by the
Company will be passed upon for the Company by Sullivan & Worcester LLP, Boston,
Massachusetts.  Jas. Murray Howe,  Secretary of Iron Mountain,  is of counsel to
Sullivan & Worcester LLP and beneficially owns 3,855 shares of common stock.

                                     EXPERTS

     The  consolidated  financial  statements  and  schedule  of  Iron  Mountain
Incorporated  and its  subsidiaries for the three years ended December 31, 1996,
included in Iron  Mountain's  Annual  Report on Form 10-K,  have been audited by
Arthur Andersen LLP, independent public accountants,  as stated in their reports
with respect thereto,  and are incorporated by reference herein in reliance upon
the authority of said firm as experts in giving said reports.

     The financial  statements  of Nashville  Vault  Company,  Ltd. for the year
ended December 31, 1995, included in Iron Mountain's  Registration  Statement on
Form S-4 (file No. 333-24635, effective date May 14, 1997), have been audited by
Geo.  S. Olive & Co. LLC,  independent  public  accountants,  as stated in their
report  with  respect  thereto,  and are  incorporated  by  reference  herein in
reliance upon the authority of said firm as experts in giving said report.

     The financial  statements  of  International  Record  Storage and Retrieval
Services, Inc. for the year ended December 31, 1995, included in Iron Mountain's
Registration  Statement on Form S-4 (file No. 333-24635,  effective date May 14,
1997), have been audited by Rothstein,  Kass & Company, P.C., independent public
accountants,   as  stated  in  their  report  with  respect  thereto,   and  are
incorporated by reference  herein in reliance upon the authority of said firm as
experts in giving said report.

     The financial  statements of Mohawk Business  Record Storage,  Inc. for the
year ended December 31, 1995, included in Iron Mountain's Registration Statement
on Form S-4 (file No. 333-24635, effective date May 14, 1997), have been audited
by Arthur  Andersen  LLP,  independent  public  accountants,  as stated in their
report  with  respect  thereto,  and are  incorporated  by  reference  herein in
reliance upon the authority of said firm as experts in giving said report.

     The  financial  statements  of Security  Archives of Minnesota for the year
ended December 31, 1996,  included in Iron Mountain's Current Report on Form 8-K
dated October 30, 1997,  have been audited by Arthur  Andersen LLP,  independent
public  accountants,  as stated in their  report with respect  thereto,  and are
incorporated by reference  herein in reliance upon the authority of said firm as
experts in giving said report.

                                       31

     The financial  statements of Wellington  Financial  Services,  Inc. for the
year ended December 31, 1996, included in Iron Mountain's Current Report on Form
8-K  dated  October  30,  1997,  have  been  audited  by  Arthur  Andersen  LLP,
independent public accountants,  as stated in their report with respect thereto,
and are  incorporated by reference herein in reliance upon the authority of said
firm as experts in giving said report.

     The financial statements of Allegiance Business Archives, Ltd. for the year
ended December 31, 1996,  included in Iron Mountain's Current Report on Form 8-K
dated  November 25, 1997,  have been audited by Stout,  Causey & Horning,  P.A.,
independent public accountants,  as stated in their report with respect thereto,
and are  incorporated by reference herein in reliance upon the authority of said
firm as experts in giving said report.

     The  financial  statements  and  schedule  of Safesite  Records  Management
Corporation  for the three  years  ended  December  31,  1996,  included in Iron
Mountain's  Registration  Statement on Form S-4 (file no.  333-24635,  effective
date May 14, 1997), have been audited by Arthur Andersen LLP, independent public
accountants,   as  stated  in  their  reports  with  respect  thereto,  and  are
incorporated by reference  herein in reliance upon the authority of said firm as
experts in giving said reports.

     The financial statements of Concorde Group, Inc. and Neil Trucker Trust for
the year ended December 31, 1996,  included in Iron Mountain's Current Report on
Form 8-K dated October 30, 1997,  have been audited by Fisher,  Schacht & Oliver
LLP,  independent  public  accountants,  as stated in their  report with respect
thereto, and are incorporated by reference herein in reliance upon the authority
of said firm as experts in giving said report.

     The financial  statements of Data  Securities  International,  Inc. for the
year ended December 31, 1996, included in Iron Mountain's Current Report on Form
8-K  dated  October  30,  1997,  have  been  audited  by  Arthur  Andersen  LLP,
independent public accountants,  as stated in their report with respect thereto,
and are  incorporated by reference herein in reliance upon the authority of said
firm as experts in giving said report.

     The  financial  statements  of Records  Retention/FileSafe,  LP for the two
years ended  December 31, 1996,  included in Iron  Mountain's  Current Report on
Form 8-K dated November 25, 1997, have been audited by Abbott Stringham & Lynch,
independent public accountants,  as stated in their report with respect thereto,
and are  incorporated by reference herein in reliance upon the authority of said
firm as experts in giving said report.

     The consolidated  financial  statements of HIMSCORP,  Inc. and Subsidiaries
for the period  February  1, 1995 to  December  31,  1995 and for the year ended
December 31,  1996,  appearing in Iron  Mountain's  Current  Reports on Form 8-K
dated October 30, 1997 and November 25, 1997, have been audited by Ernst & Young
LLP,  independent  auditors,  as set  forth in their  reports  thereon  included
therein, and are incorporated by reference herein in reliance upon the authority
of said firm as experts in accounting and auditing.

     The consolidated  financial statements of Arcus Technology  Services,  Inc.
(Successor  Company)  for the year ended  December  31, 1996 and the five months
ended December 31, 1995 and the consolidated financial statements of Arcus, Inc.
(Predecessor  Company)  for the seven  months  ended July 31,  1995 and the year
ended December 31, 1994,  appearing in Iron  Mountain's  Current Reports on Form
8-K dated  October 30, 1997 and November 25, 1997,  have been audited by Ernst &
Young LLP, independent  auditors, as set forth in their reports thereon included
therein, and are incorporated by reference herein in reliance upon the authority
of such firm as experts in accounting and auditing.

     The  consolidated  financial  statements  of Arcus Group,  Inc. for the two
years in the period  ended  December  31,  1996,  appearing  in Iron  Mountain's
Current  Reports on Form 8-K dated October 30, 1997 and November 25, 1997,  have
been audited by Ernst & Young LLP, independent  auditors,  as set forth in their
reports thereof  included  therein,  and are incorporated by reference herein in
reliance upon the authority of such firm as experts in accounting and auditing.

                                       32

     The  consolidated  financial  statements of Arcus Group,  Inc. for the year
ended December 31, 1994,  included in Iron Mountain's Current Report on Form 8-K
dated November 25, 1997, have been audited by Arthur  Andersen LLP,  independent
public  accountants,  as stated in their  report with respect  thereto,  and are
incorporated by reference  herein in reliance upon the authority of said firm as
experts in giving said report.

                                       33


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

     Set forth below is an estimate (except in the case of the registration fee)
of the  amount  of fees and  expenses  to be  incurred  in  connection  with the
issuance and distribution of the Offered  Securities  registered  hereby,  other
than underwriting discounts and commissions.


Registration Fee Under Securities Act                        $103,250
Blue Sky Fees and Expenses                                     10,000
Legal Fees and Expenses                                       260,000
Accounting Fees and Expenses                                  300,000
Printing and Engraving                                        100,000
Rating Agencies Fees                                           52,500
Miscellaneous Fees and Expenses                               174,250
                                                          -----------
   Total:                                                  $1,000,000


Item 15. Indemnification of Directors and Officers

     Section 145 of the Delaware General  Corporation Law (the "DGCL") provides,
in effect, that any person made a party to any action by reason of the fact that
he is or was a Director, officer, employee or agent of Iron Mountain may and, in
certain cases,  must be indemnified by Iron Mountain  against,  in the case of a
non-derivative  action,  judgments,   fines,  amounts  paid  in  settlement  and
reasonable expenses  (including  attorney's fees) incurred by him as a result of
such action, and in the case of a derivative action, against expenses (including
attorney's  fees),  if in either  type of action he acted in good faith and in a
manner he reasonably  believed to be in or not opposed to the best  interests of
Iron Mountain.  This  indemnification does not apply, in a derivative action, to
matters as to which it is adjudged that the Director, officer, employee or agent
is liable to Iron  Mountain,  unless  upon court  order it is  determined  that,
despite such adjudication of liability,  but in view of all the circumstances of
the case, he is fairly and reasonably  entitled to indemnity for expenses,  and,
in a non-derivative  action, to any criminal proceeding in which such person had
reasonable cause to believe his conduct was unlawful.

     Article Sixth of Iron  Mountain's  Restated  Certificate  of  Incorporation
provides that Iron Mountain shall indemnify each person who is or was an officer
or Director of Iron Mountain to the fullest  extent  permitted by Section 145 of
the DGCL.

     Article Seventh of Iron Mountain's  Restated  Certificate of  Incorporation
states that no Director of Iron Mountain shall be liable to Iron Mountain or its
stockholders  for monetary  damages for breach of fiduciary  duty as a Director,
except to the extent that  exculpation from liability is not permitted under the
DGCL as in effect when such breach occurred.

     Reference is made to the Underwriting  Agreements (Exhibits 1.1 through 1.5
hereto)  which  may  contain  certain  provisions  for  indemnification  by  the
Underwriters of the Company,  Directors,  officers and controlling persons under
certain circumstances.

Item 16. Exhibits

     Certain exhibits indicated below are incorporated by reference to documents
of Iron Mountain on file with the  Securities and Exchange  Commission.  Exhibit
numbers in parentheses refer to the exhibit numbers in the applicable filing.


                                      II-1





1.1      Form of Underwriting Agreement (for Debt Securities)*
1.2      Form of Underwriting Agreement (for Preferred Stock)*
1.3      Form of Underwriting Agreement (for Depositary Shares)*
1.4      Form of Underwriting Agreement (for Common Stock)*
1.5      Form of Underwriting Agreement (for Warrants)*
3.1      Amended and Restated Certificate of Incorporation of Iron Mountain,  as
         amended
3.2      Amended and Restated By-Laws of Iron Mountain
4.1      Form of Senior Indenture
4.2      Form of Subordinated Indenture
4.3      Form of Senior Debt Security*
4.4      Form of Subordinated Debt Security*
4.5      Form of Certificate of Designation for the Preferred Stock*
4.6      Form of Deposit  Agreement,  including  form of Depositary  Receipt for
         Depositary Shares*
4.7      Form of Preferred Stock Certificate*
4.8      Form of Debt Warrant Agreement, including form of Debt Warrant*
4.9      Form of Preferred Stock Warrant Agreement,  including form of Preferred
         Stock Warrant*
4.10     Form of Common Stock Warrant Agreement,  including form of Common Stock
         Warrant*
5        Opinion of Sullivan & Worcester LLP 
8        Opinion of Sullivan & Worcester LLP re: tax matters*
12       Statement Regarding  Computation of Ratios of Earnings to Fixed Charges
         (12)1
23.1     Consent of Ernst & Young LLP (Arcus  Group,  Inc. and Arcus  Technology
         Services, Inc.)
23.2     Consent of Arthur Andersen LLP (Arcus Group, Inc.)
23.3     Consent of Ernst & Young LLP (HIMSCORP, Inc. and Subsidiaries)
23.4     Consent of Stout, Causey & Horning, P.A. (Allegiance Business Archives,
         Ltd.)
23.5     Consent of Abbott, Stringham & Lynch (Records Retention/FileSafe)
23.6     Consent  of  Arthur  Andersen  LLP  (Security  Archives  of  Minnesota,
         Wellington Financial Services, Inc. and Data Securities  International,
         Inc.)
23.7     Consent of Fisher,  Schact & Oliver, LLP (Concorde Group, Inc. and Neil
         Tucker Trust)
23.8     Consent of Arthur Andersen LLP (Safesite Records Management Corporation
         and Mohawk Business Record Storage, Inc.)
23.9     Consent of Geo. S. Olive & Co. LLC (Nashville Vault Company, Ltd.)
23.10    Consent of Rothstein, Kass & Company, P.C (International Record Storage
         and Retrieval Service, Inc.)
23.11    Consent of Arthur Andersen LLP (Iron Mountain Incorporated)
23.12    Consent  of  Sullivan &  Worcester  LLP.  Contained  in Exhibit 5 filed
         herewith
24       Powers  of  Attorney   (contained   on  Pages  II-5  and  II-8  of  the
         Registration Statement)
25       Statement of Eligibility of Trustee on Form T-1* 
27       Financial Data Schedule (27)2

- -------------
*    To be filed by amendment or  incorporated  by reference in connection  with
     the offering of Offered Securities, as appropriate.

1    Filed as an Exhibit to Iron Mountain's Registration Statement No. 333-41715
     filed with the Securities and Exchange Commission on December 8, 1997.
2    Filed as an Exhibit to Iron  Mountain's  Quarterly  Report on Form 10-Q for
     the  quarter  ended  September  30,  1997,  filed with the  Securities  and
     Exchange Commission, File No. 0-27584.

Item 17. Undertakings

(a)  The undersigned Registrant hereby undertakes:

     (1) To file,  during any period in which  offers or sales are being made, a
     post-effective amendment to this registration statement:



                                      II-2


         (i)      To include any prospectus  required by section 10(a)(3) of the
                  Securities Act of 1933;

         (ii)     To reflect in the prospectus any facts or events arising after
                  the effective date of the registration  statement (or the most
                  recent post-effective  amendment thereof) which,  individually
                  or in the  aggregate,  represent a  fundamental  change in the
                  information   set  forth  in  this   registration   statement.
                  Notwithstanding  the  foregoing,  any  increase or decrease in
                  volume of  securities  offered (if the total  dollar  value of
                  securities offered would not exceed that which was registered)
                  and any  deviation  from the low or high end of the  estimated
                  maximum  offering  range  may  be  reflected  in the  form  of
                  prospectus  filed with the Commission  pursuant to Rule 424(b)
                  (Section  230.424(b) of 17 C.F.R.) if, in the  aggregate,  the
                  changes  in  volume  and  price  represent  no more than a 20%
                  change in the maximum  aggregate  offering  price set forth in
                  the  "Calculation of Registration  Fee" table in the effective
                  registration statement; and

         (iii)    To include any material  information  with respect to the plan
                  of distribution not previously  disclosed in this registration
                  statement or any material  change to such  information in this
                  registration statement;

         provided,  however, that subparagraphs (i) and (ii) do not apply if the
         information  required to be included in a  post-effective  amendment by
         those  paragraphs  is contained in the  periodic  reports  filed by the
         Registrant  pursuant to Section 13 or Section  15(d) of the  Securities
         and  Exchange  Act of 1934 that are  incorporated  by reference in this
         registration statement.

         (2) That  for the  purpose  of  determining  any  liability  under  the
         Securities Act of 1933,  each such  post-effective  amendment  shall be
         deemed to be a new  registration  statement  relating to the Securities
         offered herein,  and the offering of such Securities at that time shall
         be deemed to be the initial bona fide offering thereof.

         (3) To remove from registration by means of a post-effective  amendment
         any of the  Securities  being  registered  which  remain  unsold at the
         termination of the offering.

(b)      The  undersigned  Registrant  hereby further  undertakes  that, for the
         purposes of determining any liability under the Securities Act of 1933,
         each filing of the Registrant's annual report pursuant to Section 13(a)
         or  Section  15(d)  of  the   Securities   Exchange  of  1934  that  is
         incorporated  by  reference  in this  registration  statement  shall be
         deemed to be a new  registration  statement  relating to the Securities
         offered herein,  and the offering of such Securities at that time shall
         be deemed to be the initial bona fide offering thereof.

(c)      Insofar as indemnification for liabilities arising under the Securities
         Act of 1933 may be permitted  to  directors,  officers and  controlling
         persons of the Registrant  pursuant to the provisions  described  under
         Item  15 of this  registration  statement,  or  otherwise  (other  than
         insurance),  the Registrant has been advised that in the opinion of the
         Securities  and Exchange  Commission  such  indemnification  is against
         public   policy   as   expressed   in  such  Act  and  is,   therefore,
         unenforceable.  In the event that a claim for  indemnification  against
         such liabilities  (other than the payment by the Registrant of expenses
         incurred  or paid by a trustee,  officer or  controlling  person of the
         Registrant in the successful defense of any action, suit or proceeding)
         is  asserted  by  such  trustee,   officer  or  controlling  person  in
         connection with the Securities being  registered,  the Registrant will,
         unless in the  opinion of its  counsel  the matter has been  settled by
         controlling  precedent,  submit to a court of appropriate  jurisdiction
         the  question  whether  such  indemnification  by it is against  public
         policy  as  expressed  in such Act and will be  governed  by the  final
         adjudication of such issue.

(d)      The undersigned registrant hereby undertakes that:

         (1) For purposes of determining  any liability under the Securities Act
         of 1933, the information  omitted from the form of prospectus  filed as
         part of this  Registration  Statement  in  reliance  upon Rule 430A and
         contained in a form of prospectus filed by the Company pursuant to Rule
         424(b)(1) or (4) or 497(h) under

                                      II-3

         the  Securities  Act shall be  deemed  to be part of this  Registration
         Statement as of the time it was declared effective; and

         (2) For purposes of determining  any liability under the Securities Act
         of  1933,  each  post-effective  amendment  that  contains  a  form  of
         prospectus shall be deemed to be a new registration  statement relating
         to the securities offered therein,  and the offering of such securities
         at that  time  shall be  deemed to be the  initial  bona fide  offering
         thereof.

(e)      The undersigned registrant hereby undertakes to file an application for
         the purpose of determining the eligibility of each Indenture Trustee to
         act under  subsection (a) of Section 310 of the Trust  Indenture Act in
         accordance with the rules and regulations  prescribed by the Commission
         under Section 305(b)(2) of the Trust Indenture Act.


                                      II-4





                                   SIGNATURES

         Pursuant to the  requirements  of the  Securities  Act,  Iron  Mountain
Incorporated  has duly caused this  registration  statement  to be signed on its
behalf by the  undersigned,  threunto  duly  authorized,  in the city of Boston,
Commonwealth of Massachusetts, on January 13, 1998.

                               IRON MOUNTAIN INCORPORATED



                               By: /s/ C. Richard Reese
                                   Name:  C. Richard Reese
                                   Title:    Chairman of the Board of Directors
                                            and Chief Executive Officer

         Pursuant to the  requirements of the Securities Act, this  registration
statement has been signed below on January 13, 1998 by the following  persons in
the capacities and on the dates indicated;  and each of the undersigned officers
and Directors of Iron Mountain  Incorporated  hereby  severally  constitutes and
appoints C. Richard Reese,  David S. Wendell and John F. Kenny, Jr., and each of
them,  to sign for him, and in his name in the capacity  indicated  below,  such
Registration  Statement for the purpose of registering such securities under the
Securities Act, and any and all amendments thereto, including without limitation
any registration  statement or post-effective  amendment thereof filed under and
meeting  the  requirements  of rule  462(b)  under the  Securities  act,  hereby
ratifying and  confirming  our signatures as they may be signed by our attorneys
to such Registration Statement and any and all amendments thereto.




Signature                                             Title                                     Date


                                                                                           
 /s/ C.Richard Reese                                  Chairman of the Board of Directors        January 13, 1998
C. Richard Reese                                      and Chief Executive Officer


 /s/ David S. Wendell                                 President, Chief Operating Officer        January 13, 1998
David S. Wendell                                      and Director


 /s/ John F. Kenny, Jr.                               Executive Vice President and Chief        January 13, 1998
John F. Kenny, Jr.                                    Financial Officer


 /s/ Eugene B. Doggett                                Executive Vice President and Director     January 13, 1998
Eugene B. Doggett


 /s/ Constantin R. Boden                              Director                                  January 13, 1998
Constantin R. Boden


 /s/ Arthur D. Little                                 Director                                  January 13, 1998
Arthur D. Little


                                      II-5








 /s/ Vincent J. Ryan                                  Director                                  January 13, 1998
Vincent J. Ryan


 /s/ B. Thomas Golisano                               Director                                  January 13, 1998
B. Thomas Golisano


 /s/ Kent P. Dauten                                   Director                                  January 13, 1998
Kent P. Dauten



 /s/ Clarke H. Bailey                                 Director                                  January 13, 1998
Clarke H. Bailey



 /s/ Jean A. Bua                                      Vice President and Corporate              January 13, 1998
Jean A. Bua                                           Controller





                                      II-6






                                   SIGNATURES

        Pursuant  to the  requirements  of the  Securities  Act,  Iron  Mountain
Records  Management,   Inc.,  Iron  Mountain/Safesite,   Inc.,  Data  Securities
International,  Inc., IM-3 Acquisition  Corp.,  Metro Business  Archives,  Inc.,
Criterion Atlantic Property, Inc., Iron Mountain/Critical Files, Inc., Hollywood
Property,  Inc., IM San Diego, Inc., Iron Mountain  Consulting  Services,  Inc.,
Iron Mountain Data Protection  Services,  Inc., Iron Mountain Records Management
of Maryland,  Inc., Iron Mountain  Records  Management of Ohio, Inc., Inc., Iron
Mountain Records  Management of Missouri,  LLC, Iron Mountain Records Management
of Boston,  Inc.,  Iron  Mountain  Records  Management  of Florida,  Inc.,  Iron
Mountain Records Management of Michigan,  Inc., Iron Mountain Records Management
of the  Northwest,  Inc., IM Earhart,  Inc., IM Billerica,  Inc.,  Iron Mountain
Records Management of San Antonio, Inc., Iron Mountain Records Management of San
Antonio - FP, Inc., IM-AEI Acquisition Corp.,  Archives Express,  Inc., HIMSCORP
of  Philadelphia,  Inc.,  RecordKeepers,  Inc.,  HIMSCORP of  Pittsburgh,  Inc.,
HIMSCORP  of  Cleveland,  Inc.,  HIMSCORP  of New  Orleans,  Inc.,  HIMSCORP  of
Portland, Inc., HIMSCORP of San Diego, Inc., HIMSCORP of Detroit, Inc., HIMSCORP
of Los Angeles, Inc., HIMSCORP of Houston, Inc., Copyright, Inc., Record Masters
Network Corp.,  Arcus,  Inc., Arcus Data Security,  Inc.,  Towler Data Services,
Inc., Arcus Staffing Resources,  Inc., Wolf Advisory  International,  Inc., Wolf
Advisory International, Ltd., and TPI Holdings, Corp. have each duly caused this
registration statement to be signed on its behalf by the undersigned,  thereunto
duly  authorized,  in the City of  Boston,  Commonwealth  of  Massachusetts,  on
January 13, 1998


IRON MOUNTAIN RECORDS MANAGEMENT,             IRON MOUNTAIN RECORDS MANAGEMENT
  INC.                                          OF THE NORTHWEST, INC.
IRON MOUNTAIN/SAFESITE, INC.                  IM EARHART, INC.
DATA SECURITIES INTERNATIONAL, INC.           IM BILLERICA, INC.
IM-3 ACQUISITION CORP.                        IRON MOUNTAIN RECORDS MANAGEMENT
METRO BUSINESS ARCHIVES, INC.                   OF SAN ANTONIO, INC.
CRITERION ATLANTIC PROPERTY, INC.             IRON MOUNTAIN RECORDS MANAGEMENT
IRON MOUNTAIN/CRITICAL FILES, INC.              OF SAN ANTONIO - FP, INC.
HOLLYWOOD PROPERTY, INC.                      IM-AEI ACQUISITION CORP.
IM SAN DIEGO, INC.                            ARCHIVES EXPRESS, INCORPORATED
IRON MOUNTAIN CONSULTING SERVICES,            HIMSCORP OF PHILADELPHIA, INC.
  INC.                                        RECORDKEEPERS, INC.
IRON MOUNTAIN DATA PROTECTION                 HIMSCORP OF PITTSBURGH, INC.
  SERVICES, INC.                              HIMSCORP OF CLEVELAND, INC.
IRON MOUNTAIN RECORDS MANAGEMENT              HIMSCORP OF NEW ORLEANS, INC.
  OF MARYLAND, INC.                           HIMSCORP OF PORTLAND, INC.
IRON MOUNTAIN RECORDS MANAGEMENT              HIMSCORP OF SAN DIEGO, INC.
  OF OHIO, INC.                               HIMSCORP OF DETROIT, INC.
IRON MOUNTAIN RECORDS MANAGEMENT              HIMSCORP OF LOS ANGELES, INC.
  OF BOSTON, INC.                             HIMSCORP OF HOUSTON, INC.
IRON MOUNTAIN RECORDS MANAGEMENT              COPYRIGHT, INC.
  OF FLORIDA, INC.                            RECORD MASTERS NETWORK CORP.
IRON MOUNTAIN RECORDS MANAGEMENT              ARCUS STAFFING RESOURCES, INC.
  OF MICHIGAN, INC.                           WOLF ADVISORY INTERNATIONAL, INC.
ARCUS, INC.                                   WOLF ADVISORY INTERNATIONAL, LTD.
ARCUS DATA SECURITY, INC.                     TPI HOLDINGS, CORP.
TOWLER DATA SERVICES, INC.

                                              By:  /s/ C. Richard Reese
                                                   Name:  C. Richard Reese
                                                   Title: Chairman of the Board
                                                          of Directors and Chief
                                                          Executive Officer


                                      II-7






                                              IRON MOUNTAIN RECORDS MANAGEMENT
                                              OF MISSOURI, LLC

                                              By:  Iron Mountain Records
                                                   Management, Inc.
                                                    Its Manager

                                              By:  /s/ C. Richard Reese
                                                   Name:  C. Richard Reese
                                                   Title: Chairman of the Board
                                                          of Directors and Chief
                                                          Executive Officer

     Pursuant to the  requirements  of the  Securities  Act,  this  registration
statement has been signed below on January 13, 1998 by the following  persons in
the capacities and on the dates indicated;  and each of the undersigned officers
or  Directors  or Managers  of Iron  Mountain  Records  Management,  Inc.,  Iron
Mountain/Safesite,  Inc., Data Securities International,  Inc., IM-3 Acquisition
Corp., Metro Business Archives,  Inc.,  Criterion Atlantic Property,  Inc., Iron
Mountain/Critical  Files, Inc.,  Hollywood  Property,  Inc., IM San Diego, Inc.,
Iron Mountain Consulting Services, Inc., Iron Mountain Data Protection Services,
Inc., Iron Mountain Records Management of Maryland,  Inc., Iron Mountain Records
Management of Ohio,  Inc., Iron Mountain  Records  Management of Missouri,  LLC,
Iron  Mountain  Records  Management  of  Boston,  Inc.,  Iron  Mountain  Records
Management of Florida, Inc., Iron Mountain Records Management of Michigan, Inc.,
Iron Mountain Records  Management of the Northwest,  Inc., IM Earhart,  Inc., IM
Billerica,  Inc., Iron Mountain  Records  Management of San Antonio,  Inc., Iron
Mountain Records Management of San Antonio - FP, Inc., IM-AEI Acquisition Corp.,
Archives Express,  Inc., HIMSCORP of Philadelphia,  Inc.,  RecordKeepers,  Inc.,
HIMSCORP of  Pittsburgh,  Inc.,  HIMSCORP of  Cleveland,  Inc.,  HIMSCORP of New
Orleans, Inc., HIMSCORP of Portland, Inc., HIMSCORP of San Diego, Inc., HIMSCORP
of Detroit,  Inc.,  HIMSCORP of Los Angeles,  Inc.,  HIMSCORP of Houston,  Inc.,
Copyright, Inc., Record Masters Network Corp., Arcus, Inc., Arcus Data Security,
Inc., Towler Data Services, Inc., Arcus Staffing Resources,  Inc., Wolf Advisory
International,  Inc., Wolf Advisory International, Ltd., and TPI Holdings, Corp.
hereby severally constitutes and appoints C. Richard Reese, David S. Wendell and
John F. Kenny,  Jr.,  and each of them,  to sign for him, and in his name in the
capacity  indicated  below,  such  Registration  Statement  for the  purpose  of
registering such securities under the Securities Act, and any and all amendments
thereto,   including   without   limitation   any   registration   statement  or
post-effective  amendment  thereof filed under and meeting the  requirements  of
Rule 462(b) under the  Securities  Act,  hereby  ratifying  and  confirming  our
signatures as they may be signed by our attorneys to such Registration Statement
and any and all amendments thereto.




Signature                                      Title                                Date


                                                                               
 /s/ C. Richard Reese                          Chairman of the Board of             January 13, 1998
C. Richard Reese                               Directors
                                               and Chief Executive Officer


 /s/ John F. Kenny, Jr.                        Executive Vice President and         January 13, 1998
John F. Kenny, Jr.                             Chief Financial Officer



 /s/ Jean Bua                                  Vice President and Corporate         January 13, 1998
Jean Bua                                       Controller



                                      II-8





Iron Mountain Records Management,              Manager of Iron Mountain             January 13, 1998
Inc.                                           Records Management of
                                               Missouri, LLC
By: /s/ C. Richard Reese
Name:  C. Richard Reese
Title:   Chairman of the Board
          of Directors and
          Chief Executive Officer




                                      II-9