Footnote continued from previous page

     Footnote continued on next page                   Exhibit (a)(1)

                           OFFER TO PURCHASE FOR CASH

                     ALL OUTSTANDING SHARES OF COMMON STOCK

                                       OF

                         CSI COMPUTER SPECIALISTS, INC.

                                       AT

                               $1.00 NET PER SHARE

                                       BY

                            INTERACTIVE SYSTEMS, INC.

     THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M.,  EASTERN TIME, ON
     TUESDAY,  MAY 23,  2000,  UNLESS  THE OFFER IS  EXTENDED.A  SUMMARY  OF THE
     PRINCIPAL  TERMS OF THE OFFER APPEARS ONPAGES (ii) THROUGH (iv). YOU SHOULD
     READ THIS ENTIRE DOCUMENT  CAREFULLY BEFORE DECIDING WHETHER TO TENDER YOUR
     SHARES.

     NEITHER THE  SECURITIES AND EXCHANGE  COMMISSION  NOR ANY STATE  SECURITIES
     COMMISSION HAS: (A) APPROVED OR DISAPPROVED OF THE TRANSACTION;  (B) PASSED
     UPON THE MERITS OR  FAIRNESS  OF THE  TRANSACTION;  OR (C) PASSED  UPON THE
     ADEQUACY OR ACCURACY OF THE DISCLOSURE IN THIS DOCUMENT. ANY REPRESENTATION
     TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                 April 26, 2000







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                                     - iv -

                                TABLE OF CONTENTS

                                      Page

SUMMARY OF THE OFFER.........................................................ii

INTRODUCTION..................................................................1

SPECIAL FACTORS...............................................................2

I.       BACKGROUND OF THE OFFER..............................................2

II.      PURPOSE AND plans....................................................4

III. MATERIAL UNITED STATES FEDERAL INCOME TAX EFFECTS

IV.      INTERESTS OF CERTAIN PERSONS.........................................5

THE OFFER.....................................................................7

1.       TERMS OF THE OFFER...................................................7

2.       ACCEPTANCE FOR PAYMENT AND PAYMENT FOR THE COMMON SHARES.............9

3.       PROCEDURES FOR ACCEPTING THE OFFER AND TENDERING SHARES.............10

4.       WITHDRAWAL RIGHTS...................................................14

5.       PRICE RANGE OF THE COMMON SHARES; DIVIDENDS.........................15

6. POSSIBLE EFFECTS OF THE TENDER OFFER ON THE MARKET FOR THE COMMON SHARES;

         STOCK QUOTATION.....................................................15

7.       INFORMATION CONCERNING THE COMPANY..................................16

8.       INFORMATION CONCERNING ISI..........................................17

9.       SOURCE AND AMOUNT OF FUNDS..........................................18

10.      CONDITIONS OF THE OFFER.............................................19

11.      LEGAL AND REGULATORY MATTERS........................................21

12.      FEES AND EXPENSES...................................................22

13.      MISCELLANEOUS.......................................................23

SCHEDULE I..................................................................1-1







                              SUMMARY OF THE OFFER

     Interactive  Systems,  Inc. is offering  to buy all  outstanding  shares of
     common stock (the "Common Shares") of CSI Computer  Specialists,  Inc. (the
     "Company" or "CSI") not already owned by Mr.  Donald C.  Weymer,Interactive
     Systems, Inc.'s founder, Chief Executive Officer, President, a Director and
     98% shareholder (the "Offer"). Mr. Weymer already owns approximately 32% of
     the outstanding  Common Shares.  The tender price is $1.00 per Common Share
     in cash, less any required withholding taxes.  Tendering  stockholders will
     not have to pay brokerage fees or commissions.

                      WHO IS OFFERING TO BUY MY SECURITIES?

     Our name is Interactive  Systems,  Inc. ("ISI"). We are a national provider
     of enterprise  infrastructure  management services.  We provide information
     technology  outsourcing,  enterprise  systems management and not-for-profit
     solutions to commercial and non-profit  organizations.  We are an affiliate
     of the Company because our founder, Mr. Donald C. Weymer, is a stockholder,
     officer and  director  of both ISI and CSI.  See Section 8, pages 17 and 18
     for more information.

            WHAT ARE THE CLASSES AND AMOUNTS OF SECURITIES SOUGHT IN THE OFFER?

     We are  offering to purchase  all of the  outstanding  Common  Shares.  See
     "Introduction" and Section 1, pages 7 through 9 for further details.

   HOW MUCH ARE YOU OFFERING TO PAY, WHAT IS THE FORM OF PAYMENT AND WILL I HAVE
TO PAY ANY FEES OR COMMISSIONS?

     We are offering to pay $1.00 per Common Share,  net to you, in cash. If you
     are the record  owner of your  Common  Shares and you  tender  your  Common
     Shares  to us in the  Offer,  you will not  have to pay  brokerage  fees or
     similar  expenses.  If you own your Common Shares through a broker or other
     nominee,  and your broker  tenders your Common Shares on your behalf,  your
     broker or nominee  may  charge  you a fee for doing so. You should  consult
     your broker or nominee to  determine  whether any charges  will apply.  See
     "Introduction" for further information.

              HOW LONG DO I HAVE TO DECIDE WHETHER TO TENDER IN THE OFFER?

     You will have at least until 5:00 P.M.,  Eastern Time, on Tuesday,  May 23,
     2000 to tender  your  Common  Shares in the Offer.  Further,  if you cannot
     deliver everything that is required in order to make a valid tender by that
     time,  you may be able to use a  guaranteed  delivery  procedure,  which is
     described  later in this offer to purchase.  See Section 1, pages 7 through
     9, and Section 3, page 12 for further details.

                CAN THE OFFER BE  EXTENDED  AND HOW WILL I BE  NOTIFIED IF THE
OFFER IS EXTENDED?

     We have the right to extend the Offer. If we decide to extend the Offer, we
     will issue a press  release  giving the new  expiration  date no later than
     9:00 a.m.,  Eastern  Time, on the first  business day after the  previously
     scheduled  expiration  of the Offer.  See  Section 1, pages 7 through 9 for
     further details.

                     ARE THERE ANY CONDITIONS TO THE OFFER?

     The Offer is  conditioned  on certain  customary  closing  conditions. See
     Section 10, pages 19 through 21 for further details.

                        HOW DO I TENDER MY COMMON SHARES?

              If you wish to accept the Offer, you must do the following:

     - If you are a record holder (i.e., a stock  certificate has been issued to
     you), you must either  complete and sign the enclosed letter of transmittal
     and send it with your stock  certificate  to the  depositary for the Offer,
     Continental  Stock  Transfer  & Trust  Company,  or follow  the  procedures
     described in this document for book-entry  transfer.  These  materials must
     reach the depositary  before the Offer expires.  Detailed  instructions are
     contained in the letter of  transmittal  and on pages 10 through 13 of this
     document.

     - If you are a record holder but your stock certificate is not available or
     you cannot deliver it to the depositary  before the offer expires,  you may
     be able  to  tender  your  Common  Shares  using  the  enclosed  notice  of
     guaranteed  delivery.  Please call D.F. King & Co., Inc.,  our  information
     agent  for the  Offer,  at  800-928-0153  for  assistance.  See page 12 for
     further details.

     - If you hold your  Common  Shares  through a broker  or bank,  you  should
     instruct your broker or bank totender  your Common  Shares.  See Section 3,
     pages 10 through 13 for further details.

                  CAN I WITHDRAW MY PREVIOUSLY TENDERED SHARES?

     If, after tendering your Common Shares in the Offer, you decide that you do
     NOT want to accept the Offer,  you can  withdraw  your Common  Shares by so
     instructing  the depositary  before the Offer  expires.  If you tendered by
     giving  instructions  to a broker or bank,  you must instruct the broker or
     bank to arrange for the  withdrawal of your Common  Shares.  See Section 4,
     page 14 for further details.

            WHAT DOES THE COMPANY'S BOARD OF DIRECTORS THINK OF THE OFFER?

     The  Company's  Board  of  Directors  has  determined  that,  based  on the
     Company's  current financial  condition,  its inability to obtain financing
     for  its  operations,   which  could  result  in  the  Company  filing  for
     bankruptcy,  recent bid prices  for the Common  Shares on the OTC  Bulletin
     Board  and the  Company's  current  book  value,  the  Offer is in the best
     interests of the Company and its  stockholders,  and has voted to recommend
     to theCompany  stockholders acceptance of the Offer. The Company's Board of
     Directors  recommends that Company  stockholders tender their shares in the
     Offer. See "Introduction" for further details.

                   WILL THERE BE A SUBSEQUENT OFFERING PERIOD?

- - We may give stockholders who do not tender in the Offer another opportunity to
tender at the same price in a subsequent  offering period. See Section 1, page 9
for further details.

     - The subsequent offering period, if any, will begin on the day we announce
     that we have purchased  Common Shares in the Offer and last for three to 20
     business days. We may extend the subsequent offering period,but it will not
     last more than 20 business days in total. See Section 1, page 9 for further
     details.

     - There will be no withdrawal rights in the subsequent offering period. See
       Section  1, page 9 for further details.

               WHAT IS THE VALUE OF MY SHARES AS OF A RECENT DATE?

     - The average of the  closing  bid prices for Common  Shares as reported on
     the OTC Bulletin  Board over the 20 trading days  immediately  prior to the
     date before we publicly announced on April 26, 2000 the Offe to acquire the
     Common  Shares  was $0.84 per  Common  Share.  See  Section  5, page 15 for
     further information.

         -        The  closing  bid  price  for  the  Common  Shares  on the OTC
                  Bulletin  Board was $0.72 per Common  Share on April 24, 2000,
                  two  trading  days  before we  announced  the Offer to acquire
                  Common Shares.

     - The current book value of the Company is $1,248,485,  or $0.33 per Common
     Share; the current liquidation value of the Company,  which is negative, is
     approximately  $(1.00) per Common Share; market prices of the Common Shares
     over the past 90 days ranged between $0.72 and $1.00 per Common Share;  and
     Common Shares have only traded on 25 out of the past 60 trading  days,  and
     during such period,  the total number of Common Shares  traded  amounted to
     less than one-half of 1%of the total outstanding Common Shares. See Section
     5, page 15 for more information.

        - Before deciding whether to tender,  you should obtain a current market
quotation for the Common Shares.

             WHO CAN I TALK TO IF I HAVE QUESTIONS ABOUT THE OFFER?

If you have  questions  about the offer or  require  additional  information  or
assistance,  you can call our  information  agent,  D.F.  King & Co.,  Inc.,  at
800-928-0153.





                                                      - 29 -

   To: All Holders of Shares of Common Stock of CSI Computer Specialists, Inc.

                                  INTRODUCTION

Interactive  Systems,  Inc. ("ISI"),  an affiliate of CSI Computer  Specialists,
Inc. (the "Company"),  is offering to purchase all outstanding  shares of common
stock, par value $0.001 per share (the "Common Shares"), of

the Company,  except those Common Shares  already owned by Mr. Donald C. Weymer,
ISI's  founder,   Chief  Executive  Officer,   President,  a  Director  and  98%
shareholder,  at a purchase price of $1.00 per share,  net to the seller in cash
(less any required withholding taxes), without interest. The offer is being made
upon the terms and subject to the conditions set forth in this offer to purchase
and in the  related  letter of  transmittal  (which,  together,  constitute  the
"Offer").  As used in  thisdocument,  the term "Offer"  includes any  subsequent
offering period, as described in Section 1.

Stockholders  of record  who hold  Common  Shares  registered  in their name and
tender the Common Shares directly to Continental  Stock Transfer & Trust Company
(the "Depositary") will not be required to pay brokerage fees or commissions or,
except  as  described  in  Instruction  6 of the  letter of  transmittal,  stock
transfer taxes on the sale of the Common Shares in the Offer.  Stockholders  who
hold  their  Common  Shares  through a bank or  broker  should  check  with such
institution as to whether they will be charged any service fees. However, if you
do not  complete  and  sign  the  Substitute  Form W-9  included  in the  letter
oftransmittal,  you may be subject to a required  backup United  States  federal
income tax withholding of 31% of the gross proceeds  payable to you. See Section
3.We will pay all charges and expenses the  Depositary and D.F. King & Co., Inc.
(the "Information Agent") incur in connection with the Offer. See Section 12.

          THE  COMPANY'S  BOARD  OF  DIRECTORS  HAS  DETERMINED,  BASED  ON  THE
 COMPANY'S  CURRENT FINANCIAL  CONDITION,  ITS INABILITY TO OBTAIN FINANCING FOR
 ITS OPERATIONS, WHICH COULD RESULT IN THE COMPANY FILING FOR BANKRUPTCY, RECENT

BID PRICES FOR THE COMMON SHARES ON THE OTC BULLETIN BOARD (THE "OTCBB") AND THE
COMPANY'S  CURRENT  BOOK VALUE,  THAT THE OFFER IS IN THE BEST  INTERESTS OF THE
COMPANY  AND ITS  STOCKHOLDERS,  AND  HAS  VOTED  TO  RECOMMEND  TO THE  COMPANY
STOCKHOLDERS   ACCEPTANCE  OF  THE  OFFER.  THE  COMPANY'S  BOARD  OF  DIRECTORS
RECOMMENDS THAT STOCKHOLDERS TENDER THEIR COMMON SHARES IN THE OFFER.

            A copy of the  Company's  Solicitation/Recommendation  Statement  on
  Schedule 14D-9 is being mailed with this Offer. Stockholders are urged to read
  the Company's Solicitation/Recommendation Statement in its entirety.

The Offer is not  conditioned  on any  minimum  number of  Common  Shares  being
tendered.  The  Offer  is,  however,  subject  to  certain  customary  terms and
conditions. See Sections 1 and 10.

          To our  knowledge  after  making  reasonable  inquiry,  except for Mr.
   Donald  C.  Weymer,  all  of  the  executive  officers,  directors  or  other
   affiliates of the Company who hold Common Shares  currently  intend to tender
   such

Common  Shares to us in the Offer.  To our  knowledge,  after making  reasonable
inquiry, none of the executive officers and other affiliates of Company,  except
those  officers  who  serve  on the  Company's  Board of  Directors,  has made a
recommendation either in support of or opposed to the transaction.

The Company has  informed us that,  as of April 24, 2000,  there were  3,715,888
Common Shares issued and  outstanding  and 1,930,029  Common Shares reserved for
issuance upon the exercise of outstanding stock options and warrants.

THE OFFER IS CONDITIONED  UPON THE  FULFILLMENT  OF THE CONDITIONS  DESCRIBED IN
SECTION 10. THE INITIAL  OFFERING  PERIOD OF THE OFFER WILL EXPIRE AT 5:00 P.M.,
EASTERN TIME, ON TUESDAY, MAY 23, 2000, UNLESS WE EXTEND IT.

THIS OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL  CONTAIN  IMPORTANT
INFORMATION.  YOU SHOULD READ THEM  CAREFULLY  BEFORE YOU MAKE ANY DECISION WITH
RESPECT TO THE OFFER.

                                 SPECIAL FACTORS

I.          BACKGROUND OF THE OFFER

           The Company  commenced  operations in 1994 and has operated at a loss
  every year since 1996.  In 1997, in an effort to rebound from its 1996 losses,
  the Company began to implement a strategy of growth and acquisition

     that  its  Board  of  Directors  anticipated  would  expand  the  Company's
     technological  expertise and customer base. As part of this  strategy,  the
     Company  acquired  three  computer  services  companies,   Cintronix,  Inc.
     ("Cintronix"), Advanced Network Systems and Phoenix Service, Inc. ("Phoenix
     Service") in 1997. The Company's management had

     hoped that the acquisitions of Cintronix and Advanced Network Systems would
 further the Company's goal of developing regional clusters of sales and service
 representatives to improve customer service and to gain greater

     market penetration.  The expected integration of these two acquisitions and
     the projected  increase in marketing and decrease in costs due to economies
     of scale failed to occur during 1998. Only the Phoenix Service acquisition

     provided  significant  expansion  in growing the  Company's  customer  base
     profitably. As a result of the poor performance of the two acquisitions, in
     1998 the Company took a one-time  charge of  approximately  $1.7 million to
     write  down  the  carrying  value  of  the  acquired  companies  due to the
     impairment of the related assets, primarily goodwill.

          On May 19,  1998,  the Company was notified by the Nasdaq Stock Market
   that the Common Shares,  which were traded on the SmallCap Market, had failed
   to maintain a closing bid price greater than or equal to $1.00 per

Common  Share.  Although  the Company was granted a temporary  exception  to the
minimum bid price  requirement,  the requirement was still not met by the end of
the exception period,  August 18, 1998. The Common Shares were delisted from the
SmallCap Market on August 24, 1998.

In an effort to provide  liquidity  for its  shareholders  during this period of
financial  downturn,  in June 1998 the Company contacted Ferris,  Baker,  Watts,
Incorporated  ("Ferris  Baker")  regarding a potential  merger of the Company or
sale of all or part of the Common Shares. On June 23,  1998,after  negotiations,
the  Company  retained  Ferris  Baker  as its  financial  advisor  to  seek  out
prospective  purchasers  and to assist  the  Company  inthe  negotiation  of any
proposed transactions.

     Over the  course of the  ensuing  12  months,  Ferris  Baker  contacted  25
     prospective  buyers in the computer hardware  industry,  including Decision
     One,  Anacomp,  STK,  Amdahl  and  Unisys.  While  many of the  prospective
     candidates that were approached  responded  favorably upon  initialcontact,
     none of the negotiations  materialized  into an offer for the Common Shares
     or the Company's assets.

            After the termination of the contract with Ferris Baker, the Company
 made further  attempts from July 1999 to February  2000 to pursue  transactions
 that  would  provide  its   shareholders   with   liquidity.   Discussions  and
 negotiations were held with Span Optics, COSI Computer Outsourcing, Anacomp, El
 Camino, Strategia and VariLease,

     none of which  materialized  into an offer  for the  Common  Shares  or the
     Company's assets.

           Since  December  1998,  the  Company  has  had  difficulty  obtaining
   financing to meet its short-term working capital  requirements and has had to
   rely on funding from affiliates. The Company was able to obtain a credit

    facility,  which includes a revolving  line of credit,  with Crestar Bank in
    1997 to fund its operations. The credit facility expired in October 1998 and
    continued under a forbearance agreement until May 1999, so that

  Crestar Bank could reevaluate the Company's financial operations. Crestar Bank
  decided not to extend the credit facility for another year.  However,  Crestar
  Bank extended the credit line while the Company attempted to obtain

    alternative financing.  The Company attempted without success to establish a
  new line of credit with several  lenders,  including  IBM Credit  Corporation,
  FINOVA Distribution, FINOVA Special Credit Division and Sandy Spring

National Bank ("Sandy Spring"). In October 1999, Crestar Bank reduced the credit
line from $2,000,000 to $1,750,000.  On March 6, 2000, Crestar Bank notified the
Company of its intention to terminate the revolving  credit line by reducing the
line from  $1,750,000  to  $1,500,000  on March 17, 2000,  and $100,000 per week
thereafter  until the credit line reaches zero. The Company has informed us that
it cannot  continue to operate under this financing  arrangement  and could face
bankruptcy if it is unable to secure  alternative  financing for its  operations
and the  repayment  of the  credit  facility.  The  credit  line is  secured  by
substantially  all of the  Company's  assets.  At  April  24,  2000,  there  was
$1,500,000 outstanding under the credit line.

In response to the  reduction of  available  funds under the Crestar Bank credit
facility,  during fiscal years 1999 and 2000, we advanced approximately $375,000
and  $595,000,  respectively,  to the Company to cover  operating  expenses.  We
provided  the funding to the  Company at an  interest  rate of prime plus 1% per
annum,  with  principal  repayable  on our  demand.  Mr.  Donald C.  Weymer owns
approximately  98% of our equity  securities.  Mr. Weymer is our founder,  Chief
Executive  Officer,  President  and a Director.  In  addition,  Mr.  Weymer owns
approximately 32% of the Common Shares.  Mr. Weymer is the Company's Chairman of
the Board of Directors, Chief Executive Officer and Secretary.

            In November 1999, we began discussions with the Company to assist it
 in working out the Crestar Bank credit facility.  On March 30, 2000, we entered
 into an amended and restated loan and security agreement with our
     lender,  Sandy Spring,  to increase our existing line of credit,  provided,
     among other things,  that we use a portion of the funds  available to repay
     the amounts due under the Company's  credit facility with Crestar Bank. The
     increased  line of  credit  is  secured  by our  assets  and  those  of our
     subsidiary, National Conversion Systems, Inc.("NCS"). It is also personally
     guaranteed  by Mr.  Weymer.  We  intend to repay  the  amounts  owed by the
     Company  under the Crestar  Bank credit  facilityupon  the  acceptance  for
     payment of all Common Shares validly tendered pursuant to the Offer.

              In addition to the Offer we are making herein,  we proposed to the
  Company two other acquisition  alternatives:  a "two-step" tender offer, which
  is a tender offer followed by a merger,  or a merger.  The Company  advised us
  that its Board of Directors unanimously agreed on March 24, 2000 that a tender
  offer  would be in the best  interests  of the  Company  and its  shareholders
  because (i) it would not be as costly and protracted as the

other two transactions  proposed by ISI, (ii) it would enable the Company to pay
off the Crestar Bank credit  facility,  thereby avoiding a sale of the Company's
assets by Crestar  Bank to cover the  Company's  indebtedness  under that credit
facility, and (iii) it would provide liquidity to those Company stockholders who
want it at a time when the Company is  experiencing  financial  difficulty.  The
Company also advised us that its Board of Directors  supports the Offer  because
the Company's accountants, Goldstein GolubKessler, LLP, recently issued a "going
concern opinion" in connection with their report on the Company's 1999 financial
statements.  Such an opinion was also issued with respect to the Company's  1998
financial statements.

We arrived at the tender  price of $1.00 per Common Share in cash by taking into
consideration  the  following  factors:  (i) that the current  book value of the
Company is  $1,248,485,  or $0.33 per Common  Share;  (ii) that we estimate  the
current liquidation value of the Company,  which is negative,  to be $(1.00) per
Common  Share;  (iii) that market  prices of the Common  Shares over the past 90
days  ranged  between  $0.72 and $1.00 per Common  Share;  and (iv) that  Common
Shares have only traded on 25 out of the past 60 trading  days,  and during such
period,the total number of Common Shares traded amounted toless than one-half of
1% of the total  outstanding  Common  Shares.  See  Section  5, page 15 for more
information.

II.           PURPOSE and PLANS

The purpose of the Offer is to enable us and our  affiliates to acquire  control
of, and the entire equity interest in, the Company.  Our current intention is to
retain the Common  Shares that we acquire in the Offer.  As  discussed  above in
"Background  of the  Offer,"  we have  decided to make the Offer at this time in
lieu of engaging in a "two-step" tender offer and merger transaction or a merger
transaction  because of the Company's  need to workout its credit  facility with
Crestar Bank quickly. The Offer is appropriate at this time because it will best
serve the interests of the Company and its  shareholders  and maximize the value
of the Company. We intend to operate the Company as a majority  owned-subsidiary
if we,  along with Mr.  Donald C. Weymer,  hold a majority of the Common  Shares
upon the acceptance for payment of all Common Shares validly  tendered  pursuant
to the Offer.  This should allow us to reduce certain of theCompany's  costs and
expenses and to capitalize on certain  synergies  between ISI and the Company.If
all of the Company's  stockholders do not tender all of their Common Shares,  we
intend to evaluate whether, under the circumstances at that time, it would be in
the best interests of ISI and the Company to acquire additional Common Shares by
means of a second tender offer, merger or other transaction.  Except as noted in
this Offer,  the Company and ISI have no present  plans that would result in any
extraordinary   corporate  transaction,   such  as  a  merger,   reorganization,
liquidation,  or sale or transfer of a material amount of assets,  involving the
Company or any  subsidiary of the Company or any other  material  changes in the
Company's  capitalization,dividend  policy,  corporate  structure,  business  or
composition of its management or Board of Directors.

     This Offer was not designed to be a "going private  transaction"  under the
     Securities  Exchange Act of 1934, as amended (the  "Exchange  Act") because
     each class of the equity  securities of the Company is already held by less
     than 300 holders of record. In addition, the Company has advised us that it
     does not intend to file a Form 15 to terminate its  registration  under the
     Exchange Act. Rather, the Company intends to remain a public company and to
     continue to file periodic  reports,  and to satisfy the other  requirements
     under the Exchange Act, so that the Common Shares will remain listed on the
     OTCBB.  Under the rules of the OTCBB,  the Company  must remain a reporting
     company  under the  Exchange  Act in order for the Common  Shares to remain
     listed on the OTCBB.

III.  MATERIAL UNITED STATES FEDERAL INCOME TAX EFFECTS

     Your  receipt of cash for the Common  Shares in the Offer will be a taxable
     transaction for United States federal income tax purposes and may also be a
     taxable  transaction under applicable state,  local,  foreign and other tax
     laws.  For  United  States  federal  income  tax  purposes,  if you sell or
     exchange your Common  Shares in the Offer,  you would  generally  recognize
     gain or loss equal to the  difference  between the amount of cash  received
     and your tax basis for the Common Shares that you sold or  exchanged.  That
     gain or loss will be capital  gain or loss  (assuming  you hold your Common
     Shares as a capital asset),  and any such capital gain or loss will be long
     term if,  as of the date of sale or  exchange,  you  have  held the  Common
     Shares  for more than one year or will be short  term if, as of such  date,
     you have held the Common Shares for one year or less.

     The   discussion   above  may  not  be   applicable  to  certain  types  of
     stockholders, including stockholders who acquired the Common Shares through
     the    exercise   of   employee    stock    options   or    otherwise    as
     compensation,individuals  who are not  citizens or  residents of the United
     States,  foreign  corporations,  or entities that are otherwise  subject to
     special tax treatment  under the Internal  Revenue Code of 1986, as amended
     (such as insurance

     THE UNITED STATES FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED
     FOR GENERAL  INFORMATION  ONLY.  YOU ARE URGED TO CONSULT  YOUR TAX ADVISOR
     WITH  RESPECT  TO THE  SPECIFIC  TAX  CONSEQUENCES  TO  YOU  OF THE  OFFER,
     INCLUDING   UNITED  STATES  FEDERAL,   STATE  AND  LOCAL  AND  FOREIGN  TAX
     CONSEQUENCES.

IV. INTERESTS OF CERTAIN PERSONS

     BENEFICIAL OWNERSHIP OF SHARES. The following table sets forth information,
     as of April 24, 2000,  regarding  the  ownership  of Common  Shares by each
     person known by the Company to be the  beneficial  owner of more than 5% of
     the outstanding CommonShares, and any director or executive officer of ISI,
     the Company or any of their affiliates.

                         AMOUNT AND NATURE OF             PERCENT OF

BENEFICIAL OWNER                BENEFICIAL OWNERSHIP (1)            CLASS (1)
Donald C. Weymer                         1,195,000                     32.16%
Chairman of the Board of Directors, Chief Executive
 Officer and Secretary, CSI; and Chief Executive Officer,
              President and a Director, ISI

William F. Pershin                        640,000                      17.21%
President and a Director, CSI

Robert V. Windley                        100,000(2)                     2.69%
 Acting Chief Financial Officer, CSI; and Executive Vice
              President and a Director, ISI

Lynn M. Weymer                             65,000                       1.75%
              Secretary and a Director, ISI

David A. Chapp                               0                          0.00%
                      Director, CSI

All CSI and ISI directors and executive
officers as a group (5 persons)          2,000,000                     53.81%
                                                 ----------------
(1)        Unless  otherwise  noted,  each person has sole voting and investment
           power with  respect to all the Common  Shares  listed  opposite  such
           person's  name.  Beneficial  ownership  and  percentage  of class are
           calculated under Rule 13d-3 of the Exchange Act.

(2)   Consists of exercisable options to purchase Common Shares.

     RELATED  PARTY   TRANSACTIONS.   Mr.  Donald  C.  Weymer   currently   owns
     approximately  98% of our equity  securities.  Mr.  Weymer is our  founder,
     Chief Executive Officer,  President and a Director. In addition,  Mr.Weymer
     currently  owns  approximately  32% of  the  Company's  outstanding  Common
     Shares.  Mr.  Weymer is the  Company's  Chairman of the Board of Directors,
     Chief Executive Officer and Secretary.

     Mr. Robert V. Windley,  our Executive Vice  President and a Director,  also
     serves as the Company's Acting Chief Financial Officer.  Mr. Windley has an
     exercisable option to purchase 100,000 Common Shares.

     In  addition,  Ms. Lynn M. Weymer,  our  Secretary  and a Director,  is the
     daughter of Mr.  Donald C.  Weymer.  Ms.  Weymer  beneficially  owns 65,000
     Common Shares.

     The  Company  has a  contract  with  ISI to  provide  computer  maintenance
     services.  For the years  ended  December  31,  1999 and 1998,  the Company
     recognized   revenue   approximating   $1,165,000   and   $1,061,000   from
     ISI,respectively,  including  equipment  sales  of  $52,000  and  $518,400,
     respectively.

     On June 30, 1999, ISI acquired for $200,000  certain assets and liabilities
     of  Cintronix,  a  wholly-owned  subsidiary  of the Company,  including the
     assumption  of   Cintronix's   office   sublease  and  certain   employment
     agreements.  The book value of these assets and  liabilities did not differ
     materially  from their  purchase  price.  ISI also  acquired  the option to
     purchase  all of the  shares of common  stock of  Cintronix  for the sum of
     $10.00 per share.

                                    THE OFFER

1.             TERMS OF THE OFFER

             Upon  the  terms  and  subject  to  the  conditions  of  the  Offer
 (including,  if the Offer is extended or amended,  the terms and  conditions of
 any extension or  amendment),  we will  purchase all the Common Shares  validly
 tendered  and not  withdrawn in  accordance  with the  procedures  set forth in
 Section 4 on or prior to the Expiration

  Date. The term  "Expiration  Date" means 5:00 P.M.,  Eastern Time, on Tuesday,
   May 23,  2000,  unless we  extend  the  period of time for which the  initial
   offering period of the Offer is open, in which case the term "Expiration

 Date" will mean the time and date at which the initial  offering  period of the
Offer, as so extended, will expire.

          Upon the terms and  subject to the  conditions  of the Offer,  we will
  purchase,  as soon as permitted  under the terms of the Offer,  all the Common
  Shares validly tendered and not withdrawn prior to the Expiration Date.

     If, at the Expiration Date the conditions to the Offer described in Section
     10 have not been  satisfied  or earlier  waived,  then we may,  in our sole
     discretion,  extend the Expiration Date for an additional period or periods
     of time by giving oral or written notice of the extension to the Depositary
     and by publicly announcing the new Expiration Date. During any extension of
     the initial offering period (as opposed to the subsequent offering period),
     all the Common Shares  previously  tendered and not  withdrawn  will remain
     subject to the Offer and subject to your right to withdraw. See Section 4.

     Subject  to the  applicable  regulations  of the  Securities  and  Exchange
     Commission (the "SEC"),  we also reserve the right, in our sole discretion,
     at any time or from time to time, to (a)  terminate  the Offer  (whether or
     not any of the Common Shares have previously been purchased pursuant to the
     Offer) if any condition referred to in Section 10 has not been satisfied or
     earlier waived or upon the occurrence of any event specified in Section 10;
     and (b) waive any condition or otherwise amend the Offer in any respect, in
     each case, by giving oral or written notice of the  termination,  waiver or
     amendment to the Depositary and, other than, in the case of any waiver,  by
     making a public announcement thereof. We acknowledge that (a) Rule 14e-1(c)
     under the  Exchange  Act  requires us to pay the  consideration  offered or
     return the Common Shares  tendered  promptly  after the  termination of the
     Offer and (b) we may not delay the  purchase of, or payment for, any of the
     Common  Shares upon the  occurrence  of any event  specified  in Section 10
     without extending the period of time during which the Offer is open.

     The rights we reserve in the  preceding  paragraph  are in  addition to our
     rights  pursuant to Section 10. Any extension,  termination or amendment of
     the  Offer  will  be  followed  as  promptly  as  practicable  by a  public
     announcement.  An  announcement in the case of an extension will be made no
     later than 9:00 a.m.,  Eastern  Time,  on the next  business  day after the
     previously  scheduled Expiration Date. Without limiting the manner in which
     we may choose to make any public  announcement,  subject to applicable  law
     (including  those rules under the Exchange  Act that require that  material
     changes be promptly  disseminated to holders of the Common Shares), we will
     have no obligation to publish,  advertise or otherwise communicate any such
     public  announcement  other than by issuing a release to the Dow Jones News
     Service, Reuters Newswire, Bloomberg Business News and PR Newswire.

          If we make a material change in the terms of the Offer, or if we waive
          a  material  condition  to the  Offer,  we will  extend  the Offer and
          disseminate additional Offer materials to the extent required by Rules
          14d-4(d),  14d-6(c)  and 14e-1  under the  Exchange  Act.  The minimum
          period during which a tender offer must remain open following material
          changes in the terms of the  offer,  other than a change in price or a
          change in percentage of securities sought,  depends upon the facts and
          circumstances,  including the materiality of the changes. In the SEC's
          view, a tender offer should remain open for a minimum of five business
          days from the date the  material  change is first  published,  sent or
          given to stockholders,  and, if material changes are made with respect
          to  information  that  approaches  the  significance  of price and the
          percentage of securities sought, a minimum of ten business days may be
          required to allow for adequate  dissemination  and investor  response.
          With  respect to a change in price,  a minimum ten business day period
          from  the date of the  change  is  generally  required  to  allow  for
          adequate dissemination to stockholders.  Accordingly, if, prior to the
          Expiration Date, we decrease the number of Common Shares being sought,
          or increase  or decrease  the  consideration  offered  pursuant to the
          Offer,  and if the Offer is  scheduled  to expire at any time  earlier
          than the period  ending on the tenth  business  day from the date that
          notice of the increase or decrease is first  published,  sent or given
          to  holders of the Common  Shares,  we will  extend the Offer at least
          until the expiration of such period of ten business days. For purposes
          of  theOffer,  a  "business  day" means any day other than a Saturday,
          Sunday or a United  States  federal  holiday and  consists of the time
          period from 12:01 a.m. through 12:00 midnight, Eastern Time.

          THE OFFER IS CONDITIONED  UPON THE  SATISFACTION OF THE CONDITIONS SET
          FORTH IN SECTION 10.

          Consummation  of the Offer is subject to the  conditions  set forth in
          Section 10. We reserve the right, in accordance with applicable  rules
          and  regulations of the SEC, to waive any or all of those  conditions.
          If,by the  Expiration  Date, any or all of those  conditions  have not
          been  satisfied,  we may, in the exercise of our good faith  judgment,
          elect to (a) extend the Offer,  and, subject to applicable  withdrawal
          rights,  retain all of the tendered Common Shares until the expiration
          of the Offer,  as  extended,  subject  to the terms of the Offer;  (b)
          waive all of the  unsatisfied  conditions,  and,  subject to complying
          with  applicable  rules and regulations of the SEC, accept for payment
          all of the Common  Shares so tendered;  or (c) terminate the Offer and
          not accept for payment any of the Common  Shares and return all of the
          tendered Common Shares to the tendering Company  stockholders.  In the
          event that we waive any  condition  set forth in  Section  10, the SEC
          may, if the waiver is deemed to  constitute  a material  change to the
          information previously provided to the Company stockholders,require
          that the  Offer  remain  open for an additional  period of time or
          that we  disseminate  information concerning such waiver.

          The Company has  provided us with its  stockholder  lists and security
          position  listings  for the  purpose  of  disseminating  the  Offer to
          holders of the Common Shares. We will mail this offer to purchase, the
          related  letterof  transmittal and other relevant  materials to record
          holders of the Common  Shares,  and we will  furnish the  materials to
          brokers,  dealers,  commercial  banks,  trust  companies  and  similar
          persons  whose  names,  or the names of whose  nominees,appear  on the
          securityholder   lists  or,  if   applicable,   that  are   listed  as
          participants in a clearing agency's  security  position  listing,  for
          forwarding to beneficial owners of the Common Shares.

          SUBSEQUENT  OFFERING PERIOD.  We reserve the right, in accordance with
          the rules and regulations of the SEC, to provide a subsequent offering
          period of three business days to 20 business days after the expiration
          of the initial  offering  period and our purchase of the Common Shares
          tendered.   A  subsequent  offering  period  would  give  the  Company
          stockholders  who do not tender in the initial offering period another
          opportunity  to tender their Common  Shares and receive the same Offer
          price. If we elect to provide a subsequent  offering  period,  we will
          disseminate  additional  Offer  materials,  if  necessary.  During the
          subsequent  offering period,  Company  stockholders  will not have the
          right to withdraw the Common  Shares  previously  tendered or tendered
          during the subsequent offering period.

2.   ACCEPTANCE FOR PAYMENT AND PAYMENT FOR THE COMMON SHARES

          Upon the terms and subject to the conditions of the Offer  (including,
          if we extend or amend the Offer, the terms and conditions of the Offer
          as so  extended  or  amended),  we will  purchase,  by  accepting  for
          payment,  and will pay for, all of the Common Shares validly  tendered
          and not withdrawn (as permitted by Section 4) prior to the  Expiration
          Date promptly after the later of (a) the  Expiration  Date and (b) the
          satisfaction  or  waiver of the  conditions  to the Offer set forth in
          Section 10. In addition,  subject to  applicable  rules of the SEC, we
          reserve the right to delay  acceptance for payment of, or payment for,
          the Common Shares pending  receipt of any  governmental  approvals set
          forth in Section 11.For  information with respect to approvals that we
          are  required  to obtain  prior to the  completion  of the Offer,  see
          Section 11.

          In all  cases,  we will pay for the  Common  Shares  purchased  in the
          Offer,  including during the subsequent  offering  period,  only after
          timely receipt by the Depositary of (a) certificates  representing the
          Common  Shares  ("Company  Certificates")  or timely  confirmation  (a
          "Book-Entry  Confirmation")  of the book-entry  transfer of the Common
          Shares into the  Depositary's  account at The Depository Trust Company
          (the "Book-Entry  Transfer  Facility")  pursuant to the procedures set
          forth in Section 3; (b) the  appropriate  letter of transmittal  (or a
          facsimile),  properly  completed and duly executed,  with any required
          signature  guarantees  or an Agent's  Message  (as  defined  below) in
          connection  with a book-entry  transfer;  and (c) any other  documents
          that the letter of transmittal requires.

             The term  "Agent's  Message"  means a  message  transmitted  by the
   Book-Entry  Transfer Facility to, and received by, the Depositary and forming
   a part of a Book-Entry Confirmation, which states that the Book-Entry

 Transfer Facility has received an express  acknowledgment  from the participant
 in the Book-Entry  Transfer  Facility  tendering the Common Shares that are the
 subject of the Book-Entry Confirmation that the participant has received and
 agrees to be bound by the terms of the  letter  of  transmittal participant.

          For  purposes  of the Offer,  we will be deemed to have  accepted  for
          payment,  and purchased,  the Common Shares  validly  tendered and not
          withdrawn  as,  if and  when we give  oral or  written  notice  to the
          Depositary of our acceptance of the Common Shares for payment pursuant
          to  the  Offer.In  all  cases,  upon  the  terms  and  subject  to the
          conditions  of the  Offer,  payment  for the Common  Shares  purchased
          pursuant  to the  Offer,  including  during  any  subsequent  offering
          period,  will be made by deposit of the purchase  price for the Common
          Shares with the Depositary,  which will act as agent for the tendering
          Company  stockholders for the purpose of receiving payment from us and
          transmitting payment to the validly tendering Company stockholders.

          UNDER NO CIRCUMSTANCES  WILL WE PAY INTEREST ON THE PURCHASE PRICE FOR
          THE COMMON SHARES, EXCEPT AS MAY BE REQUIRED BY APPLICABLE LAW.

          If we do not purchase any of the tendered  Common  Shares  pursuant to
 the  Offer  for  any  reason,  or if you  submit  the  Company  Certificates
 representing more Common Shares than you wish to tender, we will return the
Company Certificates  representing the unpurchased or untendered Common Shares,
without  expense to you (or, in the case of the Common  Shares  delivered by
book-entry transfer into the Depositary's account at the Book-Entry

          Transfer  Facility  pursuant to the procedures set forth in Section 3,
          the Common Shares will be credited to an account maintained within the
          Book-Entry  Transfer Facility),  as promptly as practicable  following
          the expiration,termination or withdrawal of the Offer.

          IF, PRIOR TO THE  EXPIRATION  DATE,  WE INCREASE THE PRICE  OFFERED TO
          HOLDERS OF THE COMMON  SHARES IN THE OFFER,  WE WILL PAY THE INCREASED
          PRICE TO ALL  HOLDERS OF THE COMMON  SHARES  THAT WE  PURCHASE  IN THE
          OFFER,  WHETHER  OR NOT THE COMMON  SHARES  WERE  TENDERED  BEFORE THE
          INCREASE IN PRICE.

          We reserve the right to  transfer or assign,  in whole or from time to
          time in part, to one or more of our  subsidiaries  or  affiliates  the
          right to purchase all or any portion of the Common Shares  tendered in
          the  Offer,butany  such transfer or assignment  will not relieve us of
          our  obligations  under the Offer or prejudice  your rights to receive
          payment  for the Common  Shares  validly  tendered  and  accepted  for
          payment in the Offer.

3.    PROCEDURES FOR ACCEPTING THE OFFER AND TENDERING SHARES

               VALID TENDER OF THE COMMON SHARES.  Except as set forth below, in
               order for you to tender  the  Common  Shares  in the  Offer,  the
               Depositary must receive the letter of transmittal (or a facsimile
               thereof),  properly  completed  and  signed,  together  with  any
               required signature guarantees or an Agent's Message in connection
               with a  book-entry  delivery  of the Common  Shares and any other
               documents that the letter of transmittal  requires at its address
               set forth on the back cover of this offer to purchase on or prior
               to the  Expiration  Date,  and  either (a) you must  deliver  the
               Company  Certificates  representing the tendered Common Shares to
               the  Depositary  or you  must  cause  your  Common  Shares  to be
               tendered  pursuant to the procedure for  book-entry  transfer set
               forth  below  and  the   Depositary   must   receive   Book-Entry
               Confirmation,  in each case, on or prior to the Expiration  Date,
               or (b) you must comply with the  guaranteed  delivery  procedures
               set forth below.

               THE METHOD OF  DELIVERY  OF COMPANY  CERTIFICATES,  THE LETTER OF
               TRANSMITTAL  AND ALL OTHER  REQUIRED  DOCUMENTS IS AT YOUR OPTION
               AND SOLE RISK, AND DELIVERY WILL BE CONSIDERED MADE ONLY WHEN THE
               DEPOSITARY  ACTUALLY  RECEIVES  THE  COMPANY   CERTIFICATES.   IF
               DELIVERY IS BY MAIL,  WE  RECOMMEND  USING  REGISTERED  MAIL WITH
               RETURN RECEIPT  REQUESTED,  PROPERLY  INSURED.  IN ALL CASES, YOU
               SHOULD ALLOW SUFFICIENT TIME TO ENSURE TIMELY DELIVERY.

               BOOK-ENTRY  TRANSFER.  The  Depositary  will establish an account
               with  respect to the  Common  Shares at the  Book-Entry  Transfer
               Facility for purposes of the Offer within two business days after
               the  date  of the  Offer.  Any  financial  institution  that is a
               participant in the system of the Book-Entry Transfer Facility may
               make  book-entry  delivery  of the Common  Shares by causing  the
               Book-Entry  Transfer  Facility to transfer the Common Shares into
               the Depositary's  account at the Book-Entry  Transfer Facility in
               accordance with the Book-Entry  Transfer  Facility's  procedures.
               However,  although  the Common  Shares may be  delivered  through
               book-entry transfer into theDepositary's  account at a Book-Entry
               Transfer  Facility,  the  Depositary  must  receive the letter of
               transmittal  (or  facsimile  thereof),   properly  completed  and
               signed,  with any required  signature  guarantees,  or an Agent's
               Message in connection with a book-entry  transfer,  and any other
               required documents, at its address set forth on the back cover of
               this offer to purchase on or before the  Expiration  Date, or you
               must  comply with the  guaranteed  delivery  procedure  set forth
               below.

               DELIVERY OF  DOCUMENTS  TO THE  BOOK-ENTRY  TRANSFER  FACILITY IN
               ACCORDANCE  WITH ITS PROCEDURES  DOES NOT CONSTITUTE  DELIVERY TO
               THE DEPOSITARY.

               SIGNATURE  GUARANTEES.  A bank,  broker,  dealer,  credit  union,
               savings  association  or other  entity  that is a member  in good
               standing of the Securities  Transfer Agents Medallion Program (an
               "Eligible  Institution") must guarantee signatures on all letters
               of  transmittal,  unless the Common Shares  tendered are tendered
               (a) by a  registered  holder of the  Common  Shares  that has not
               completed either the box labeled "Special Payment

   Instructions"or  the  box  labeled  "Special  Delivery  Instructions"  on the
                letter of  transmittal  or (b) for the  account  of an  Eligible
                Institution. See Instruction 1 of the letter of transmittal.

               If the  Company  Certificates  are  registered  in the  name of a
               person other than the signer of the letter of transmittal,  or if
               payment is to be made to, or Company Certificates for unpurchased
               Common  Shares are to be issued or  returned  to, a person  other
               than  the   registered   holder,   then  the   tendered   Company
               Certificates must be endorsed or accompanied by appropriate stock
               powers,  signed  exactly  as the name or  names of  theregistered
               holder or holders  appear on the Company  Certificates,  with the
               signatures on the Company Certificates or stock powers guaranteed
               by  an  Eligible   Institution  as  provided  in  the  letter  of
               transmittal.   See   Instructions  1  and  5  of  the  letter  of
               transmittal.

           If  the  Company   Certificates  are  forwarded   separately  to  the
     Depositary,  a properly  completed and duly executed  letter of transmittal
     (or manually signed facsimile) must accompany each delivery of the Company
     Certificates.

               GUARANTEED DELIVERY.  If you want to tender your Common Shares in
               the  Offer  and your  Company  Certificates  are not  immediately
               available or time will not permit all required documents to reach
               the Depositary on or before the Expiration Date or the procedures
               for book-entry  transfer cannot be completed on time, your Common
               Shares may nevertheless be tendered if you comply with all of the
               following guaranteed delivery procedures:

          - your tender is made by or through an Eligible Institution;

          -   the Depositary receives,  as described below, a properly completed
              and signed Notice of  Guaranteed  Delivery,  substantially  in the
              form made available by us, on or before the Expiration Date; and

               -  the  Depositary  receives  the  Company   Certificates  (or  a
               Book-Entry Confirmation)  representing all of the tendered Common
               Shares,  in proper  form for  transfer  together  with a properly
               completed and duly executed  letter of  transmittal  (or manually
               signed facsimile), with any required signature guarantees (or, in
               the case of a book-entry  transfer,  an Agent's  Message) and any
               other  documents  required  by the letter of  transmittal  within
               three  trading  days after the date of execution of the Notice of
               Guaranteed Delivery.

               You may deliver the Notice of Guaranteed  Delivery by hand,  mail
               or  facsimile  transmission  to the  Depositary.  The  Notice  of
               Guaranteed  Delivery  must  include a  guarantee  by an  Eligible
               Institution  in the form set forth in the  Notice  of  Guaranteed
               Delivery  and a  representation  that you own the  Common  Shares
               being  tendered  within  the  meaning  of Rule  14e-4  under  the
               Exchange Act. Guaranteed delivery procedures are not available in
               the subsequent offering period.

               Notwithstanding any other provision of the Offer, we will pay for
               the Common Shares only after timely  receipt by the Depositary of
               the Company Certificates for, or, of Book-Entry Confirmation with
               respect  to, the Common  Shares,  a properly  completed  and duly
               executed letter of transmittal (or facsimile  thereof),  together
               with any  required  signature  guarantees  (or,  in the case of a
               book-entry transfer,  an Agent's Message) and any other documents
               required by the appropriate  letter of transmittal.  Accordingly,
               payment might not be made to all of the tendering stockholders at
               the same time and will depend upon when the  Depositary  receives
               the Company  Certificates  or  Book-Entry  Confirmation  that the
               Common Shares have been transferred into the Depositary's account
               at a Book-Entry Transfer Facility.

               BACKUP UNITED STATES  FEDERAL INCOME TAX  WITHHOLDING.  Under the
               backup  United  States  federal  income  tax   withholding   laws
               applicable  to certain  stockholders  (other than certain  exempt
               stockholders,  including,  among  others,  all  corporations  and
               certain foreign  individuals),  the Depositary may be required to
               withhold  31% of  the  amount  of  any  payments  made  to  those
               stockholders  pursuant  to the Offer.  To prevent  backup  United
               States  federal  income tax  withholding,  you must  provide  the
               Depositary with your correct taxpayer  identification  number and
               certify that you are not subject to backup United States  federal
               income tax  withholding  by completing  the  Substitute  Form W-9
               included in the letter of transmittal.  Non-United States holders
               must  submit a  completed  Form W-8 BEN to  qualify  as an exempt
               recipient.  These forms may be obtained from the Depositary.  See
               Instructions 11 and 12 of the letter of transmittal.

               APPOINTMENT AS PROXY. By executing the letter of transmittal, you
               irrevocably  appoint  our  designees,  and each of them,  as your
               agents,   attorneys-in-fact  and  proxies,  with  full  power  of
               substitution in each, in the

    manner set forth in the letter of  transmittal,  to the full  extent of your
   rights with  respect to the Common  Shares that you tender and that we accept
   for payment  and with  respect to any and all other  Common  Shares and other
   securities  or rights issued or issuable in respect of those Common Shares on
   or after the date of this

 Offer. All such powers of attorney and proxies will be  considered  irrevocable
    and coupled with an interest in the tendered Common Shares. This appointment
    will be  effective  when  we  accept  your  Common  Shares  for  payment  in
    accordance  with the terms of the Offer.  Upon such  acceptance for payment,
    all other powers of attorney and

 proxies  given  by you with  respect  to your  Common  Shares  and  such  other
   securities or rights prior to such payment will be revoked,  without  further
   action,  and no subsequent powers of attorney and proxies may be given by you
   (and,  if given,  will not be deemed  effective).  Our designees  will,  with
   respect to the Common Shares and such

  other  securities  and  rights  for which the  appointment  is  effective,  be
    empowered to exercise all of your voting and other rights as they,  in their
    sole discretion, may deem proper at any annual or special meeting of the

  Company  stockholders,  or any  adjournment  or  postponement  thereof,  or by
   consent  in lieu of any such  meeting or  otherwise.  In order for the Common
   Shares to be deemed  validly  tendered,  immediately  upon the acceptance for
   payment of such Common  Shares,  we or our designee  must be able to exercise
   full voting rights with respect to

       such Common Shares and other securities,  including voting at any meeting
of the Company stockholders.

               DETERMINATION  OF  VALIDITY.  All  questions  as to the  form  of
               documents  and  the  validity,  eligibility  (including  time  of
               receipt) and  acceptance  for payment of any tender of the Common
               Shares will be  determined by us, in our sole  discretion,  which
               determination  will be  final  and  binding  on all  parties.  We
               reserve  the  absolute   right  to  reject  any  or  all  tenders
               determined by us not to be in proper form or the acceptance of or
               payment  for  which  may,  in  the  opinion  of our  counsel,  be
               unlawful.  We also reserve the absolute right to waive any of the
               conditions  of the  Offer or any  defect or  irregularity  in any
               tender  of  the   Common   Shares  of  any   particular   Company
               stockholder, whether or not similar defects or irregularities are
               waived in the case of other Company stockholders.

               No  tender  of the  Common  Shares  will be  deemed  to have been
     validly  made until all  defects  and  irregularities  with  respect to the
     tender have been cured or waived by us. None of ISI, the Company, the

               Depositary,  the  Information  Agent or any of  their  respective
               affiliates or assigns,  or any other individual or entity will be
               under  any  duty to  give  any  notification  of any  defects  or
               irregularities  in tenders or incur  anyliability  for failure to
               give any such notification.

           Our acceptance for payment of Common Shares tendered  pursuant to any
 of the procedures  described above will constitute a binding  agreement between
 us and you upon the terms and subject to the conditions of the Offer.

4.          WITHDRAWAL RIGHTS

               Except as  described  in this  Section  4,  tenders of the Common
               Shares made in the Offer are irrevocable. You may withdraw Common
               Shares that you have previously tendered in the Offer at any time
               on  or  before  the  Expiration  Date,  and,  unless  theretofore
               accepted for payment as provided  herein,  you may also  withdraw
               the  Common  Shares at any time after  June 25,  2000;  provided,
               however,  you may not  withdraw  the  Common  Shares  during  any
               subsequent offering period.

          If, for any reason, acceptance for payment of any of the Common Shares
     tendered in the Offer is delayed, or we are unable to accept for payment or
     pay for the Common Shares tendered in the Offer, then, without

               prejudice  to  our  rights  set  forth  in  this  document,   the
               Depositary may,  nevertheless,  on our behalf,  retain the Common
               Shares  that you have  tendered,  and you may not  withdraw  your
               Common Shares,  except to the extent that you are entitled to and
               duly exercise  withdrawal  rights as described in this Section 4.
               Any such delay will be by an extension of the Offer to the extent
               required by law.

                In order for your  withdrawal to be  effective,  you must timely
  deliver a written  or  facsimile  transmission  notice  of  withdrawal  to the
  Depositary at the address set forth on the back cover of this offer to

   purchase. Any such notice of withdrawal must specify your name, the number of
  Common Shares that you want to withdraw, and (if the Company Certificates have
  been tendered) the name of the registered holder of the Common

   Shares as shown on the Company  Certificate  if different  from your name. If
     the Company Certificates have been delivered or otherwise identified to the
     Depositary, then, prior to the physical release of such Company

   Certificates,  you must  submit the serial  numbers  shown on the  particular
      Company  Certificates  evidencing the Common Shares to be withdrawn and an
      Eligible Institution must guarantee the signature on the notice of

    withdrawal,  except in the case of Common Shares tendered for the account of
  an Eligible  Institution.  If the Common Shares have been tendered pursuant to
  the procedures for book-entry transfer set forth in Section 3, the

               notice of  withdrawal  must  specify  the name and  number of the
               account at the  appropriate  Book-Entry  Transfer  Facility to be
               credited with the withdrawn Common Shares, in which case a notice
               of withdrawal will be effective if delivered to the Depositary by
               any method of delivery  described  in the first  sentence of this
               paragraph. You may not rescind a withdrawal of the Common Shares.
               Any  Common  Shares  that you  withdraw  will be  considered  not
               validly  tendered for  purposes of the Offer,  but you may tender
               your Common Shares again at any time before the  Expiration  Date
               by following any of the procedures described in Section 3.

           All questions as to the form and validity (including time of receipt)
     of notices of withdrawal will be determined by us, in our sole  discretion,
     which determination will be final and binding. None of ISI, the

               Company,  the Depositary,  the Information  Agent or any of their
               respective  affiliates  or assigns,  or any other  individual  or
               entity  will be under  any duty to give any  notification  of any
               defects or irregularities in anynotice of withdrawal or incur any
               liability for failure to give any such notification.

5.            PRICE RANGE OF THE COMMON SHARES; DIVIDENDS

             The Common Shares are traded on the OTCBB under the symbol  "CSIS."
   The  average of high and low bid  prices on the OTCBB for the  Common  Shares
   over the last 20 full days of trading prior to the date before ISI

  publicly  announced the Offer on April 26, 2000 was $0.84 per share.  On April
  24,  2000,  two full days of trading  before  ISI  announced  the  Offer,  the
  reported  closing  bid price on the OTCBB for the Common  Shares was $0.72 per
  share. The following table sets forth, for the periods indicated, the range of
  high and low bid prices for the Common Shares on the OTCBB.

                                                        HIGH               LOW

                                   FISCAL 1998

First Quarter....................................       1.50               0.75
Second Quarter...................................       1.06               0.56
Third Quarter....................................       1.00               0.41
Fourth Quarter...................................       1.00               0.33
                                   FISCAL 1999

First Quarter....................................       0.75               0.50
Second Quarter...................................       0.88               0.44
Third Quarter....................................       0.75               0.56
Fourth Quarter...................................       1.00               0.56
                                   FISCAL 2000

First Quarter....................................       1.00               0.75
Second Quarter (through April 24, 2000)..........       0.91               0.72

            The               Company  has  informed  us that,  as of April  24,
                              2000, the Common Shares were held by 54 holders of
                              record.  The  Company  has never  declared  a cash
                              dividend.
STOCKHOLDERS ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR THE COMMON SHARES

               6.  POSSIBLE  EFFECTS  OF THE OFFER ON THE  MARKET FOR THE COMMON
               SHARES; STOCK QUOTATION

           Our  purchase of the Common  Shares  pursuant to the Offer could have
 the following effects.  The purchase of the Common Shares pursuant to the Offer
 will reduce the number of Common Shares that might otherwise trade on

  the OTCBB and could  adversely  affect the  liquidity  and market value of the
  remaining  Common Shares held by the public,  as well as the  availability  of
  quotations for the value of the Common Shares.  We cannot predict  whether the
  reduction in the number of Common  Shares would have an adverse or  beneficial
  effect  on the  market  price for or  marketability  of the  Common  Shares or
  whether it would cause future market prices to be greater or less than

 the tender price. The  availability of market  quotations would depend upon the
  number of holders of Common Shares  remaining at such time and the interest in
  maintaining a market in the Common Shares on the part of securities firms.

7.    INFORMATION CONCERNING THE COMPANY

            The  Company  is a Delaware  corporation.  Its  principal  executive
            offices are located at 904 Wind River Lane, Suite 100, Gaithersburg,
            Maryland 20878, and its telephone number is (301) 921-8860.

               The  following  description  of the Company and its  business has
               been taken from the Company's Form 10-K for the fiscal year ended
               December 31, 1999 (the "1999 Form 10-K"), and is qualified in its
               entirety by reference to such report. The Company provides a full
               range  of  computer  hardware   services,   including  sales  and
               maintenance  of mainframe  and mid-range  computer  equipment and
               parts,  network design and installation,  computer upgrades,  and
               installation  and  de-installation  of  equipment.   The  Company
               provides  its  services  to  commercial  customers,  agencies  of
               federal,   state  and  local   governments,   and   universities,
               hospitals,  and  associations in the  Mid-Atlantic  region of the
               United States, including West Virginia,  Virginia,  Maryland, the
               District  of  Columbia,   New  Jersey,  New  York,   Connecticut,
               Pennsylvania, and in Illinois and California.

               The  selected  financial  information  of  the  Company  and  its
               consolidated  subsidiaries set forth below has been excerpted and
               derived from the 1999 Form 10-K. More comprehensive financial and
               other  information  is  included  in  those  reports   (including
               management's  discussion and analysis of financial  condition and
               results of operations)  and in other reports and documents  filed
               by the Company with the SEC. The financial  information set forth
               below is  qualified  in its  entirety by reference to the reports
               and documents filed by the Company with the SEC and the financial
               statements  and related notes that they contain.  You can examine
               these  reports and other  documents  and obtain copies of them in
               the manner set forth below.

                               BALANCE SHEET DATA

                                       AS AT                          AS AT

                                 DECEMBER 31, 1999             DECEMBER 31, 1998
                                 -----------------             -----------------

Current assets                               $4,096,858               $5,702,481
Noncurrent assets                               656,687                1,258,499
Current liabilities                           3,944,536                5,291,633
Noncurrent liabilities                                0                    4,474
Book value per share - basic                       0.33                     0.53
Book value per share - diluted                     0.33                     0.53


                              INCOME STATEMENT DATA

                                           YEAR ENDED                YEAR ENDED
                                        DECEMBER 31, 1999      DECEMBER 31, 1998
(Loss) per common share from
       continuing operations - basic         $(0.07)                    $(0.99)
(Loss) per common share from continuing
       operations - diluted                   (0.07)                     (0.99)
Net (loss) per common share - basic           (0.20)                     (0.99)
Net (loss) per common share - diluted         (0.20)                     (0.99)


               The Company files annual,  quarterly and special  reports,  proxy
               statements and other  information  with the SEC. You may read and
               copy any reports,  statements or other  information  filed at the
               SEC's  public   reference   room  at  450  Fifth  Street,   N.W.,
               Washington, D.C. 20549, or at the SEC's public reference rooms in
               New York, New York,and Chicago,  Illinois. Please call the SEC at
               1-800-SEC-0330  for further  information on the public  reference
               rooms.  The Company's SEC filings should also be available to the
               public from  commercial  document  retrieval  services and at the
               Internet   world  wide  web  site   maintained   by  the  SEC  at
               http://www.sec.gov.

            Although we have no knowledge  that any such  information is untrue,
     we take no  responsibility  for the accuracy or completeness of information
     contained in the Offer with respect to the Company or any of its

  subsidiaries     or  affiliates  (other  than ISI) or for any  failure  by the
                   Company to  disclose  events  that may have  occurred  or may
                   affect the significance or accuracy of any such information.

8........             INFORMATION CONCERNING ISI

               ISI is a Virginia corporation,  whose principal executive offices
               are located at 1777 North Kent Street, Arlington, Virginia 22209,
               and whose telephone  number is (703) 247-5443.  Headquartered  in
               Arlington,  Virginia  since 1991,  we are a national  provider of
               enterprise   infrastructure   management  services.   We  provide
               information technology outsourcing, enterprise systems management
               and   not-for-profit   solutions  to  commercial  and  non-profit
               organizations.

               Donald C. Weymer owns  approximately 98% of our equity securities
               and is our founder,  Chief  Executive  Officer,  President  and a
               Director.  In addition,  Mr. Weymer owns approximately 32% of the
               outstanding  Common Shares and is the  Company's  Chairman of the
               Board of Directors, Chief Executive Officer and Secretary.

             We do not own any Common Shares directly.  We have an option
              to purchase  all  outstanding  shares of common  stock of
              Cintronix, a wholly owned subsidiary of the Company.

            The  name,   business   address,   citizenship,   present  principal
   occupation  and  employment  history  for the past five  years of each of our
   directors and executive officers are set forth in Schedule I to this offer to
    purchase.

           None of ISI or,  to the best  knowledge  of ISI,  any of the  persons
      listed in Schedule I to this offer to  purchase,  has during the last five
      years (a) been convicted in a criminal proceeding (excluding traffic

               violations  or similar  misdemeanors)  or (b) been a party to any
               judicial or  administrative  proceeding  (except for matters that
               were dismissed without sanction or settlement) that resulted in a
               judgment,  decree or final order enjoining the person from future
               violations  of, or  prohibiting  activities  subject  to,  United
               States federal or state  securities laws or finding any violation
               of such laws.

          Except as set forth elsewhere in the Offer or Schedule I to this offer
  to purchase:  (a) neither we nor, to our knowledge,  any of the persons listed
  in Schedule I or any associate or majority-owned  subsidiary of ours or of any
  of the persons so listed,  beneficially  owns or has a right to acquire any of
  the Common Shares or any

 other equity  securities of the Company;  (b) neither we nor, to our knowledge,
  any of the  individuals or entities  referred to in clause (a) above or any of
  their executive officers, directors or subsidiaries has effected any

    transaction  in the  Common  Shares or any other  equity  securities  of the
   Company during the past 60 days; (c) neither we nor, to our knowledge, any of
   the persons listed in Schedule I to this offer to purchase, has any

 contract, arrangement, understanding or relationship with any other person with
  respect to any securities of the Company  (including,  but not limited to, any
  contract, arrangement, understanding or relationship concerning the

    transfer or the  voting  of any such  securities,  joint  ventures,  loan or
         option  arrangements,  puts or calls,  guaranties of loans,  guaranties
         against loss or the giving or withholding of proxies, consents or

  authorizations);  (d) in the past two years,  there have been no  transactions
    that would  require  reporting  under the rules and  regulations  of the SEC
    between us or any of our subsidiaries or, to our knowledge, any of the

   persons listed in Schedule I, on the one hand,  and the Company or any of its
    executive officers,  directors or affiliates,  on the other hand; and (e) in
    the past two years, there have been no contacts, negotiations or

               transactions  between  us or any of our  subsidiaries  or, to our
               knowledge,  any of the  persons  listed in Schedule I, on the one
               hand, and the Company or any of its  subsidiaries  or affiliates,
               on  the  other  hand,  concerning  a  merger,   consolidation  or
               acquisition,  a Offer  or other  acquisition  of  securities,  an
               election of directors  or a sale or other  transfer of a material
               amount of assets.

9.             SOURCE AND AMOUNT OF FUNDS

          We estimate that the total amount of funds required to purchase all of
 the outstanding Common Shares not already held by Mr. Donald C. Weymer pursuant
 to the Offer (exclusive of fees and expenses) will be approximately

 $2,520,888.  We intend to obtain the funds  necessary  to purchase  the Common
 Shares  pursuant to the Offer and to pay related  fees and  expenses  from an
 existing line of credit we have with Sandy Spring and from our working capital.

              We intend to obtain the funds  necessary  to  purchase  the Common
   Shares  primarily from an existing  $4,000,000  line of credit under a credit
   facility that ISI has with Sandy Spring. On March 30, 2000, ISI and

 Sandy Spring  executed an amended and restated loan and security  agreement and
  related  promissory  note to increase  the line of credit from  $2,000,000  to
  $4,000,000, copies of which are filed as Exhibit (b)(1) to a Schedule TO,
 which we have filed with the SEC,  and are  summarized  below (the
"Security Agreement").

               The Security Agreement,  which expires on June 30, 2001, provides
               that the funds will be available at an interest  rate of 1% above
               prime per annum.  Interest  on the line of credit  will be repaid
               monthly.  The line of credit is the obligation of ISI and will be
               jointly and severally guaranteed by Mr. Weymer. In addition,  Mr.
               Weymer  has agreed by  separate  agreement  with Sandy  Spring to
               subordinate   any  claims  he  may  have  against  ISI  regarding
               indebtedness to claims arising under the Security  Agreement with
               Sandy Spring.

               The line of credit is secured by a first lien  security  interest
               in: all of ISI's and NCS'  receivables,  inventory and equipment,
               and all  property  and funds of ISI now owned or later  acquired;
               (b) all of ISI's andNCS' assets for which Sandy Spring  currently
               has or later  acquires a lien;  (c) all  proceeds and products of
               the foregoing items; and (d) all intellectual property rights and
               general intangibles.

           The Security  Agreement also contains  terms and conditions  that are
 customary  for  credit  facilities  of this  type,  including  terms  that will
 obligate ISI to: (a) limit its outstanding principal balance under the line

    of credit to 75% of  eligible  accounts  receivable;  (b)  maintain  certain
  ratios, including current assets to liabilities,  debt to worth, and cash flow
  to debt  service;  and (c) obtain Sandy  Spring's  prior  written  consent for
  extraordinary transactions, such as the purchase of stock of another entity, a
  merger or consolidation,  or the acquisition of subsidiaries.  Pursuant to the
  written consent provisions of the Security Agreement, ISI has

 obtained a consent  letter  from  Sandy  Spring  authorizing  the Offer and all
  actions  relating  to, or resulting  from,  the Offer.  The consent  letter is
  attached as Exhibit (b)(2) to a Schedule TO, which we have filed with the SEC.

  Any  additional  funds  that  may be necessary   to   purchase   the
 Common  Shares will be obtained from our working capital.

10.    CONDITIONS OF THE OFFER

          Notwithstanding  any other provision of the Offer, ISI is not required
 to accept for payment or (subject to any  applicable  rules and  regulations of
 the SEC) pay for, and may delay the acceptance for payment of, any of

  the tendered Common Shares and may terminate or amend the Offer, unless at any
 time on or after April 26, 2000 and prior to the expiration of the Offer,  none
 of the following conditions exists or has occurred and remains in effect:

               (1) There is pending any action by any  governmental  entity,  or
               any law proposed, sought, promulgated,
               enacted, entered, enforced or deemed applicable to the Offer:

               -  seeking  to or that  does  prohibit  or  impose  any  material
               limitations  on ISI's  ownership or operation  (or that of any of
               its  subsidiaries or affiliates) of all or a material  portion of
               its or the  Company's or any of its  subsidiaries'  businesses or
               assets,  or to compel ISI or its  subsidiaries  and affiliates to
               dispose of or hold separate any material  portion of the business
               or  assets   of  the   Company   or  ISI  and  their   respective
               subsidiaries, in each case, taken as a whole,

               - seeking to or that does make the  acceptance for payment of, or
               the  payment  for,  some or all of the Common  Shares  illegal or
               otherwise  prohibiting,  restricting  or  significantly  delaying
               consummation  of the Offer, or seeking to obtain from the Company
               or ISI any damages that are material in ISI's view in relation to
               the Company and its subsidiaries taken as a whole,

           -   seeking  to or  that  does  impose  material  limitations  on the
               ability of ISI,  or render ISI  unable,  to acquire or hold or to
               exercise  effectively  all  rights  of  ownership  of the  Common
               Shares, including,

               the  right  to vote any  Common  Shares  purchased  by ISI on all
               matters  properly  presented  to  the  Company  stockholders,  or
               effectively to control in any material  respect in ISI's view the
               business,assets or operations of the Company, its subsidiaries or
               ISI or any of its respective affiliates,

           -     seeking to or that does  impose  circumstances  under which the
                 purchase  or  payment  for  some  or all of the  Common  Shares
                 pursuant  to the Offer could  reasonably  be expected to have a
                 material adverse effect on ISI, or

               - that otherwise would  reasonably be expected to have a material
               adverse effect on the Company or ISI; or

               (2) There has  occurred  any  change  that  could  reasonably  be
               expected to constitute a material  adverse  effect on the Company
               or ISI; or

(3)            There has occurred (A) any general  suspension  of trading in, or
               limitation  on  prices  for,  securities  on any  national  stock
               exchange or in the  over-the-counter  market in the United States
               for a period in

                excess  of  24  hours  (excluding   suspensions  or  limitations
                  resulting  solely from physical  damage or  interference  with
                  such  exchanges  not  related to market  conditions),  (B) the
                  declaration of a

               banking  moratorium  or any  suspension of payments in respect of
                  banks in the United States (whether or not mandatory), (C) the
                  commencement  of a war  or  other  international  or  national
                  calamity,

                 directly or indirectly,  involving the United  States,  (D) any
                  mandatory   limitation  by  any  United  States   governmental
                  authority or agency that would  reasonably be expected to have
                  a material

                adverse  effect  on the  extension  of  credit by banks or other
                 financial  institutions,  or  (E)  in  the  case  of any of the
                 foregoing,  existing  at the  time of the  commencement  of the
                 Offer, a material acceleration or worsening thereof; or

(4)  The Offer has been terminated in accordance with its terms; or

(5)             (A) The Company's  Board of Directors has withdrawn,  changed or
                modified    (including    by   amendment   of   the    Company's
                Solicitation/Recommendation  Statement  on Schedule  14D-9) in a
                manner adverse to ISI its

               approval or  recommendation  of the Offer or has  recommended  an
               acquisition proposal, or has adopted any resolution to effect any
               of the  foregoing,  (B) the  Company's  Board  of  Directors  has
               recommended  any  proposal  other than the Offer in respect of an
               acquisition proposal, (C) the Company's Board of

                 Directors  has  continued  discussions  with  any  third  party
                  concerning an acquisition  proposal for more than ten business
                  days after the date of receipt of such  acquisition  proposal,
                  or (D) an

                acquisition   proposal  that  is  publicly  disclosed  and  that
               contains a proposal as to price  (without  regard to whether such
               proposal  specifies  a  specific  price or a range  of  potential
               prices) has been

                commenced,  publicly proposed or communicated to the Company and
                   the  Company's  Board  of  Directors  has not  rejected  such
                   proposal  within ten business days of the earlier to occur of
                   (i) the

               Company's receipt of such acquisition  proposal and (ii) the date
               such acquisition proposal first becomes publicly disclosed; or

(6)            Not all consents,  permits and approvals of governmental entities
               and other persons have been  obtained  without  material  adverse
               conditions  attached and material expenses imposed on the Company
               or any of its subsidiaries; or

               (7) ISI shall become aware that any material contractual right of
               the  Company  or any of its  subsidiaries  shall be  impaired  or
               otherwise  adversely  affected  as a result  of the  transactions
               contemplated by the Offer, or any covenant,  term or condition in
               any of the Company's or any of its  subsidiaries'  instruments or
               agreements that are or may be materially  adverse to the value of
               the Common  Shares in the hands of ISI or any other  affiliate of
               ISI (including, without limitation, any event of default that may
               ensue as a result of the  consummation of the Offer, or any other
               business  combination  or  the  acquisition  of  control  of  the
               Company); or

(8)            ISI shall have  reached an agreement  or  understanding  with the
               Company  providing for  termination  of the Offer,  or ISI or any
               other  affiliate  of ISI shall  have  entered  into a  definitive
               agreement or shall have  announced an agreement in principle with
               the Company providing for a merger or other business  combination
               with the  Company  or the  purchase  of stock  or  assets  of the
               Company; which, in the sole

               judgment  of  ISI  in  any  such  case,  and  regardless  of  the
               circumstances  (including  any action or  inaction  by ISI or any
               other affiliate of ISI) giving rise to any such condition,  makes
               it  inadvisable  to  proceed  with the  Offer  and/or  with  such
               acceptance of payment or payment.

               The foregoing conditions are for the sole benefit of ISI. ISI may
               assert the  failure of any of the  conditions  regardless  of the
               circumstances  (other than any circumstance arising solely by any
               action or inaction by ISI) giving rise to any such  failure.  The
               conditions  may be waived by ISI in whole or in part at any time.
               The failure by ISI at any time to exercise  any of the  foregoing
               rights  shall not be deemed a waiver of any such right,  and each
               such right shall be deemed an ongoing  right that may be asserted
               at any time.

          A     public  announcement  may be made of a  material  change  in, or
                waiver  of,   such   conditions.   The  Offer  may,  in  certain
                circumstances, be extended in connection with any such change or
                waiver.

               ISI acknowledges that the SEC believes that (a) if ISI is delayed
               in accepting the Common  Shares,  it must either extend the Offer
               or terminate the Offer and promptly return the Common Shares, and
               (b) thecircumstances in which a delay in payment is permitted are
               limited and do not include  unsatisfied  conditions of the Offer,
               except with respect to most required regulatory approvals.

11.              LEGAL AND REGULATORY MATTERS

               GENERAL. Except as set forth in the Offer, based on our review of
               publicly  available filings by the Company with the SEC and other
               information  regarding  the  Company,  we are  not  aware  of any
               licenses or regulatory  permits that appear to be material to the
               business of the Company and its  subsidiaries,  taken as a whole,
               that might be adversely affected by our acquisition of the Common
               Shares  in the  Offer.  In  addition,  we are  not  aware  of any
               filings,  approvals or other actions by or with any  governmental
               entity or  administrative  or  regulatory  agency  that  would be
               required for our  acquisition  or ownership of the Common Shares.
               Should any such approval or

  other action be required, we expect to seek such approval or action, except as
 described under "State Takeover Laws." Should any such approval or other action
 be  required,  we cannot be  certain  that we would be able to obtain  any such
 approval or action without substantial conditions, or that adverse consequences
 might not result to the

               Company's or its subsidiaries'  businesses, or that certain parts
               of the Company's,  ISI's or any of their respective subsidiaries'
               businesses  might not have to be disposed of or held  separate in
               order to obtain such  approval or action.  In that event,  we may
               not be required to purchase any Common  Shares in the Offer.  See
               Section 10 for a description of the conditions to the Offer.

            STATE TAKEOVER LAWS. A number of states (including  Delaware,  where
  the Company is  incorporated)  have adopted takeover laws and regulations that
  purport,  to  varying  degrees,  to  be  applicable  to  attempts  to  acquire
  securities of corporations  that are incorporated in those states or that have
  substantial assets, stockholders,

               principal  executive  offices or principal  places of business in
               those states.  To the extent that these state  takeover  statutes
               purport  to  apply to the  Offer,  we  believe  that  those  laws
               conflict   with   United   States   federal   law   and   are  an
               unconstitutional  burden  on  interstate  commerce.  We have  not
               attempted  to  comply  with  any  state   takeover   statutes  in
               connection  with the Offer. We reserve the right to challenge the
               validity or applicability  of any state law allegedly  applicable
               to the Offer,  and  nothing  in the Offer nor any action  that we
               take in connection with the Offer is intended as a waiver of that
               right. In the event that it is asserted that one or

               more  takeover  statutes  apply  to  the  Offer,  and  it is  not
               determined by an appropriate  court that the statutes in question
               do  not  apply  or are  invalid  as  applied  to  the  Offer,  as
               applicable, we may be required to file certain documents with, or
               receive  approvals from, the relevant state  authorities,  and we
               might be unable to accept  for  payment  or  purchase  the Common
               Shares  tendered  in the Offer or be  delayed  in  continuing  or
               consummating  the Offer. In that case, we may not be obligated to
               accept  for  purchase,  or pay  for,  any of  the  Common  Shares
               tendered. See Section 10.

               ANTITRUST. We do not believe that the Hart-Scott-Rodino Antitrust
               Improvements  Act of  1976,  as  amended,  is  applicable  to the
               acquisition of Common Shares contemplated by our offer.

           MARGIN  REQUIREMENTS.  The Common Shares are not "margin  securities"
  under the  regulations of the Board of Governors of the Federal Reserve System
  and, accordingly, such regulations are not applicable to our offer.

12.       FEES AND EXPENSES

               We have retained D.F.  King & Co., Inc. as  Information  Agent in
               connection  with the Offer.  The  Information  Agent may  contact
               holders of the Common Shares by mail, telephone, telex, telegraph
               and personal interview and may request brokers, dealers and other
               nominee stockholders to forward material relating to the

    Offer to beneficial owners of the Common Shares. We will pay the Information
 Agent  reasonable and customary  compensation for these services in addition to
 reimbursing the Information Agent for its reasonable out-of-pocket

      expenses.  We have  agreed to  indemnify  the  Information  Agent  against
     certain  liabilities and expenses in connection  with the Offer,  including
     certain liabilities under the United States federal securities laws.

          In  addition,  we have  retained  Continental  Stock  Transfer & Trust
     Company  as the  Depositary.  We will  pay the  Depositary  reasonable  and
     customary compensation for its services in connection with the Offer, will

   reimburse the Depositary for its reasonable  out-of-pocket  expenses and will
        indemnify  the  Depositary  against  certain  liabilities  and expenses,
        including certain liabilities under the federal securities laws.

               Except  as  set  forth  above,  we  will  not  pay  any  fees  or
               commissions to any broker,  dealer or other person for soliciting
               tenders  of the Common  Shares  pursuant  to the  Offer.  We will
               reimburse brokers, dealers,  commercial banks and trust companies
               and other  nominees,  upon request,  for  customary  clerical and
               mailing  expenses   incurred  by  them  in  forwarding   offering
               materials to their customers.

              ISI has paid or will be responsible  for paying all other expenses
in connection with the Offer.

13.               MISCELLANEOUS

                 We are not aware of any jurisdiction in which the making of the
   Offer is prohibited by any  administrative or judicial action pursuant to any
   valid  state  statute.  If  we  become  aware  of  any  valid  state  statute
   prohibiting  the making of the Offer or the  acceptance of the Common Shares,
   we will make a good faith

               effort to comply with that state statute.  If, after a good faith
               effort, we cannot comply with the state statute, we will not make
               the Offer to,  nor will we accept  tenders  from or on behalf of,
               the holders of the Common Shares in that state.

              We have filed with the SEC a Schedule TO,  together with exhibits,
    furnishing certain additional information with respect to the Offer, and may
    file amendments to the Schedule TO. The Schedule TO and any

               exhibits or amendments may be examined and copies may be obtained
               from the SEC in the same  manner as  described  in Section 7 with
               respect to information concerning the Company, except that copies
               will not be available at the regional offices of the SEC.

               WE HAVE NOT AUTHORIZED  ANY PERSON TO GIVE ANY  INFORMATION OR TO
               MAKE ANY  REPRESENTATION  ON OUR BEHALF THAT IS NOT  CONTAINED IN
               THIS OFFER TO  PURCHASE OR IN THE LETTER OF  TRANSMITTAL  AND, IF
               GIVEN OR MADE,  YOU  SHOULD NOT RELY ON ANY SUCH  INFORMATION  OR
               REPRESENTATION.





               Neither the  delivery of the Offer nor any  purchase  pursuant to
               the Offer will, under any  circumstances,  create any implication
               that there has been no change in the affairs of ISI,  the Company
               or any of  their  respective  subsidiaries  since  the date as of
               which information is furnished or the date of the Offer.

                            INTERACTIVE SYSTEMS, INC.

                                 April 26, 2000





                                      I-II

                                       I-1

                                   SCHEDULE I

                     DIRECTORS AND EXECUTIVE OFFICERS OF ISI

           DIRECTORS  AND EXECUTIVE  OFFICERS OF ISI. The  following  table sets
 forth the name and present  principal  occupation or  employment,  and material
 occupations,  positions, offices or employments for the past five years of each
 director and executive  officer of ISI. Unless otherwise  indicated below, each
 occupation set forth opposite

   each individual  refers to employment with ISI. The business  address of each
  such individual is c/o ISI, 1777 North Kent Street,  Arlington,  VA 22209, and
  each such individual is a citizen of the United States of America.

                                  NAME POSITION

  Donald C. Weymer....... President, Chief Executive Officer and a Director
  Robert V. Windley.......Executive Vice President and a Director

   Lynn M. Weymer......... Secretary and a Director

               Donald C. Weymer has been the President,  Chief Executive Officer
               and a Director  of ISI since 1991.  Mr.  Weymer has also been the
               Chief Executive  Officer,  Chairman of the Board of Directors and
               Secretary  of the  Company  since  March  1994.  He was the Chief
               Financial  Officer of the Company  from March 1994 until  October
               1995.

               Robert V. Windley has been an Officer and a Director of ISI since
               September  1997 and the  acting  Chief  Financial  Officer of CSI
               since  August  1999.  From August  1995 to  September  1997,  Mr.
               Windley served as Senior Vice President of McFadden & Associates.
               Prior to joining McFadden & Associates,  Mr. Windley, served as a
               principal at Booz-Allen & Hamilton.

               Lynn M. Weymer has served as Secretary and a Directorof ISI since
               1991.





                                      I-II





               Facsimile  copies of letters of transmittal,  properly  completed
               and duly  executed,  will be  accepted.  Letters of  transmittal,
               Company  Certificates and any other required  documents should be
               sent or delivered by each Company stockholder or broker,  dealer,
               commercial bank, trust company or other nominee to the Depositary
               at its address set forth below:

                       The Depositary for the Offer is:

                   CONTINENTAL STOCK TRANSFER & TRUST COMPANY

   By Mail                      By Hand                  By Overnight Courier

 Reorganization Department  Reorganization Department  Reorganization Department
 2 Broadway, 19th Floor         2 Broadway, 19th Floor   2 Broadway, 19th Floor

 New York, NY 10004            New York, NY 10004         New York, NY 10004

            By Facsimile Transmission: Telephone to Confirm Facsimile:
                                (212) 509-5150       (212) 845-3226

             You  may  direct  questions  and  requests  for  assistance  to the
   Information Agent at the addresses and telephone numbers set forth below. You
   may obtain additional copies of this offer to purchase, the letter of

               transmittal and other Offer materials from the Information  Agent
               as set forth below,  and they will be  furnished  promptly at our
               expense.  You may also contact your  broker,  dealer,  commercial
               bank,  trust company or other nominee for  assistance  concerning
               the Offer.

                     The Information Agent for the Offer is:

                              D.F. King & Co., Inc.

                           77 Water Street, 20th Floor

                               New York, NY 10005

                  Banks and Brokers Call Collect (212) 269-5550
                    All Others Call Toll Free (800) 928-0153