THIS WARRANT,  AND THE SECURITIES  ISSUABLE UPON EXERCISE HEREOF,  HAVE
         NOT BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR
         ANY APPLICABLE STATE SECURITIES LAWS OR "BLUE SKY" LAWS, AND MAY NOT BE
         TRANSFERRED   UNLESS  SO  REGISTERED   OR  UNLESS  AN  EXEMPTION   FROM
         REGISTRATION IS AVAILABLE.

                               MLC HOLDINGS, INC.

                             STOCK PURCHASE WARRANT


Date of Issuance: October 23, 1998                           Certificate No. W-1


                  FOR VALUE RECEIVED, MLC Holdings, Inc., a Delaware corporation
(the "Company"), hereby grants to TC Leasing, LLC or its registered assigns (the
"Registered  Holder") the right to purchase from the Company 1,090,909 shares of
Warrant  Stock at a price  per share of $11.00  (as  adjusted  from time to time
hereunder,  the "Exercise Price"). The amount and kind of securities  obtainable
pursuant  to the  rights  granted  hereunder  and the  purchase  price  for such
securities  are subject to adjustment  pursuant to the  provisions  contained in
this Stock Purchase Warrant (this "Warrant").

                  This Warrant is subject to the following provisions:

                  Section 1. Definitions.  The following terms have meanings set
forth below:

                  "Affiliate"  of any  particular  Person means any other Person
controlling,  controlled by or under common control with such particular Person,
where "control" means the  possession,  directly or indirectly,  of the power to
direct the management and policies of a Person whether  through the ownership of
voting securities, contract or otherwise.

                  "Aggregate Exercise Price" has the meaning set forth in 
Section 2B(i)(d)(1) hereof.

                  "Assignee" has the meaning set forth in Section 6A hereof.

                  "Assignment" has the meaning set forth in Section 2B(i)(c) 
hereof.

                 "Base Price" has the meaning set forth in Section 3A(i) hereof.

                  "Common  Stock"  means,  collectively,  the  Company's  Common
Stock,  par value  $.01 per  share,  and any  capital  stock of any class of the
Company  hereafter  authorized which is not limited to a fixed sum or percentage
of par or stated  value in  respect  to the  rights of the  holders  thereof  to
participate in dividends or in the  distribution of assets upon any liquidation,
dissolution or winding up of the Company.






                                                                 


                  "Common Stock Deemed  Outstanding"  means,  at any given time,
the number of shares of Common Stock actually outstanding at such time, plus the
number of shares of Common Stock deemed to be outstanding pursuant to paragraphs
3B(i) and 3B(ii)  hereof  regardless  of  whether  the  Options  or  Convertible
Securities are actually exercisable at such time.

                  "Common  Stock  Purchase  Agreement"  means the  Common  Stock
Purchase Agreement,  dated as of the date hereof, by and between the Company and
TC Leasing, LLC.

                  "Company" has the meaning set forth in the preface hereof.

                  "Convertible   Securities"   means  any  stock  or  securities
(directly or  indirectly)  convertible  into or  exchangeable  for Common Stock,
except  for any such  stock or  securities  issued or  granted  pursuant  to the
Company's  Master Stock Incentive Plan (including any of its component plans) or
1998 Long-Term Incentive Plan, each as in effect on the Date of Issuance.

                 "Date of Issuance" means October 23, 1998.

                 "Exercise Agreement" has the meaning set forth in Section 2C
 hereof.

                 "Exercise Period" has the meaning set forth in Section 2A
 hereof.

                 "Exercise Price" has the meaning set forth in the preamble 
hereto.

                 "Exercise Time" has the meaning set forth in Section 2B hereof.

                 "GAAP" means United States generally accepted accounting
principles.

                 "HSR Act" means the Hart-Scott-Rodino  Antitrust  Improvements
Act of 1976, as amended from time to time.

                 "Lien"  means  any  mortgage,   pledge,   security   interest,
encumbrance, lien or charge of any kind.

                 "Liquidating Dividend" has the meaning set forth in Section 4
 hereof.






                 "Market  Price"  means,  with  respect to any  security on any
date,  (x) if such  security  is  quoted  on  NASDAQ  or  listed  on a  national
securities  exchange,  the closing  sales price of such  security on NASDAQ or a
national securities  exchange,  as applicable,  on the last trading day prior to
such  date,  and (y) if such  security  is not  quoted  on NASDAQ or listed on a
national securities exchange, the fair value per share determined jointly by the
Company  and  the  Registered  Holder,  provided  that  if the  Company  and the
Registered Holder are unable to reach an agreement within a reasonable period of
time,  such fair value shall be  determined by a recognized  investment  banking
firm  jointly  selected  by  the  Company  and  the  Registered  Holder,   whose
determination  shall be final and binding  upon the  Company and the  Registered
Holder (and the fees and expenses of such recognized  investment banker shall be
paid by the Company).

                  "Material Adverse Effect" has the meaning set forth in the 
Common Stock Purchase Agreement.

                  "NASDAQ" means National Association of Securities Dealers
Automated Quotations National Market System.

                  "Options"  means any  rights or options  to  subscribe  for or
purchase  Common  Stock or  Convertible  Securities,  except  for any  rights or
options to  subscribe  for or purchase  Common Stock or  Convertible  Securities
issued  or  granted  pursuant  to the  Company's  Master  Stock  Incentive  Plan
(including any of its component plans) or 1998 Long-Term Incentive Plan, each as
in effect on the Date of Issuance.

                  "Organic Change" has the meaning set forth in Section 3D 
hereof.

                  "Person" means an individual, a partnership,  a corporation, a
limited liability  company,  an association,  a joint stock company,  a trust, a
joint venture,  an unincorporated  organization and a governmental entity or any
department, agency or political subdivision thereof.

                  "Public  Offering"  means a sale of Common Stock to the public
in an offering  pursuant to an effective  registration  statement filed with the
SEC pursuant to the  Securities  Act, as then in effect,  provided that a Public
Offering  shall not  include  an  offering  made in  connection  with a business
acquisition or combination or an employee benefit plan.

                  "Purchase Rights" has the meaning set forth in Section 5
hereof.

                  "Purchaser" has the meaning set forth in Section 2B(i)(A)
 hereof.

                  "Requirement Date" has the meaning set forth in Section 6B
 hereof.

                  "Requirement Notice" has the meaning set forth in Section 6A
 hereof.

                  "Sale of the Company" means,  whether in a single  transaction
or in a series of related  transactions,  (i) a sale of all or substantially all
of the assets of the Company and its  Subsidiaries  on a consolidated  basis, or
(ii) the  transfer  or other  disposition  of more  than 50% of the  outstanding
Common Stock or the outstanding common equity securities of any of the Company's
Subsidiaries  (in  each  case  whether  accomplished  by stock  purchase,  asset
purchase, merger, recapitalization, reorganization or other transaction).

                  "Securities Act" means the Securities Act of 1933, as amended,
or any similar federal law then in force.






                  "SEC"  means  the  United  States   Securities   and  Exchange
Commission  and any  governmental  body or agency  succeeding  to the  functions
thereof.

                  "Stockholders  Agreement"  means the  Stockholders  Agreement,
dated as of the date hereof, among the Company and certain of its stockholders.

                  "Subsidiary"  means  any  Person  with  respect  to which  the
Company (or a Subsidiary thereof) owns a majority of the common stock or has the
power to vote or direct the voting of sufficient  securities to elect a majority
of the directors or other governing body.

                  "Warrant" has the meaning set forth in the preamble hereto.

                  "Warrant  Stock" means the Company's  Common Stock,  par value
$.01 per  share;  provided  that if there is a change  such that the  securities
issuable  upon  exercise of this  Warrant are issued by an entity other than the
Company  or there is a change in the type or class of  securities  so  issuable,
then the term "Warrant Stock" shall mean one share of the security issuable upon
exercise  of the Warrant if such  security is issuable in shares,  or shall mean
the  smallest  unit in which such  security is issuable if such  security is not
issuable in shares.

                  Section 2.  Exercise of Warrant.

                  2A. Exercise Period.  The Registered  Holder may exercise,  in
whole  or in part  (but not as to a  fractional  share of  Warrant  Stock),  the
purchase  rights  represented  by this Warrant at any time and from time to time
after  the  Date of  Issuance  to and  including  December  31,  2001 (as may be
extended pursuant to Section 2B(vi) hereof, the "Exercise Period").

                  2B.      Exercise Procedure.

     (i) This Warrant  shall be deemed to have been  exercised  when the Company
has received all of the following items (the "Exercise Time"):

                                    (a) a completed Exercise Agreement, executed
                  by the Person  exercising  all or part of the purchase  rights
                  represented by this Warrant (the "Purchaser");

                                    (b)     this Warrant;

                                    (c) if this Warrant is not registered in the
                  name of the Purchaser,  an assignment (an "Assignment") in the
                  form set forth in Exhibit II hereto  evidencing the assignment
                  of this Warrant to the Purchaser, in which case the Registered
                  Holder shall have  complied with the  provisions  set forth in
                  Section 7 hereof; and






                                    (d)  either  (1) a check  or  wire  transfer
                  payable to the  Company in an amount  equal to the  product of
                  the  Exercise  Price  multiplied  by the  number  of shares of
                  Warrant  Stock  being   purchased   upon  such  exercise  (the
                  "Aggregate  Exercise  Price"),  (2) with the prior approval of
                  the  Company,  the  surrender to the Company of debt or equity
                  securities  of the Company  having a Market Price equal to the
                  Aggregate  Exercise Price of the Warrant Stock being purchased
                  upon  such  exercise  (provided  that  for  purposes  of  this
                  subsection,  the  Market  Price  of any  note  or  other  debt
                  security or any preferred stock shall be deemed to be equal to
                  the  aggregate  outstanding  principal  amount or  liquidation
                  value thereof plus all accrued and unpaid interest  thereon or
                  accrued or declared and unpaid dividends  thereon) or (3) with
                  the prior  approval of the  Company,  a written  notice to the
                  Company  that the  Purchaser is  exercising  the Warrant (or a
                  portion  thereof) by authorizing  the Company to withhold from
                  issuance a number of shares of  Warrant  Stock  issuable  upon
                  such  exercise of the  Warrant  which when  multiplied  by the
                  Market  Price of the Warrant  Stock is equal to the  Aggregate
                  Exercise  Price (and such  withheld  shares shall no longer be
                  issuable under this Warrant).

     (ii)  Certificates  for shares of Warrant Stock  purchased upon exercise of
this  Warrant  shall be delivered  by the Company to the  Purchaser  within five
business  days after the date of the  Exercise  Time.  Unless  this  Warrant has
expired or all of the purchase  rights  represented  hereby have been exercised,
the  Company  shall  prepare  a new  Warrant,  substantially  identical  hereto,
representing  the rights  formerly  represented  by this Warrant  which have not
expired or been  exercised  and shall,  within  such  five-business  day period,
deliver such new Warrant to the Person  designated  for delivery in the Exercise
Agreement.

     (iii) The Warrant Stock issuable upon the exercise of this Warrant shall be
deemed to have been  issued  to the  Purchaser  at the  Exercise  Time,  and the
Purchaser  shall be deemed for all purposes to have become the record  holder of
such Warrant Stock at the Exercise Time.

     (iv) The issuance of certificates for shares of Warrant Stock upon exercise
of this Warrant  shall be made without  charge to the  Registered  Holder or the
Purchaser for any issuance tax in respect  thereof or other cost incurred by the
Company in connection  with such exercise and the related  issuance of shares of
Warrant  Stock.  Each share of Warrant  Stock  issuable  upon  exercise  of this
Warrant shall,  upon payment of the Exercise Price  therefor,  be fully paid and
nonassessable and free from all Liens with respect to the issuance thereof.

     (v) The  Company  shall not close its books  against  the  transfer of this
Warrant or of any share of Warrant Stock issued or issuable upon the exercise of
this Warrant in any manner  which  interferes  with the timely  exercise of this
Warrant.






     (vi) The Company and the  Registered  Holder or Purchaser,  as  applicable,
shall use their best  efforts to make any filings  with any  governmental  body,
NASDAQ or any stock  exchange in which the Warrant Stock is listed or obtain any
approvals of any  governmental  body,  NASDAQ,  any stock  exchange in which the
Warrant Stock is listed or the  stockholders of the Company  (including those in
connection  with under the HSR Act) required prior to or in connection  with any
exercise of this Warrant within a reasonable period of time. The Exercise Period
shall be extended to the extent  necessary  to allow such filings to be made and
such  approvals to be obtained.  The costs and  expenses  (including  reasonable
attorneys fees) associated with any filing or approval required (including those
in connection with the HSR Act) shall be paid by the Company.

     (vii)  Notwithstanding  any other provision  hereof,  if an exercise of any
portion of this Warrant is to be made in  connection  with a Public  Offering or
the Sale of the Company, the exercise of any portion of this Warrant may, at the
election of the holder  hereof,  be  conditioned  upon the  consummation  of the
Public Offering or the Sale of the Company in which case such exercise shall not
be deemed to be effective until the consummation of such transaction.

     (viii) The Company shall at all times reserve and keep available out of its
authorized  but  unissued  shares of Warrant  Stock  solely  for the  purpose of
issuance  upon the  exercise of the  Warrants,  such number of shares of Warrant
Stock issuable upon the exercise of all outstanding Warrants.  The Company shall
take all such  actions as may be  necessary  to assure  that all such  shares of
Warrant  Stock may be so  issued  without  violation  of any  applicable  law or
governmental  regulation or any requirements of any domestic securities exchange
upon which shares of Warrant Stock may be listed (except for official  notice of
issuance  which shall be  immediately  delivered  by the Company  upon each such
issuance). The Company shall not take any action which would cause the number of
authorized  but unissued  shares of Warrant  Stock to be less than the number of
such shares required to be reserved  hereunder for issuance upon exercise of the
Warrants.

                  2C. Exercise Agreement. Upon any exercise of this Warrant, the
exercise agreement (the "Exercise Agreement") shall be substantially in the form
set forth in Exhibit I hereto,  except  that if the shares of Warrant  Stock are
not to be  issued  in the name of the  Person  in whose  name  this  Warrant  is
registered,  the Exercise  Agreement  shall also state the name of the Person to
whom the certificates  for the shares of Warrant Stock are to be issued,  and if
the  number of shares of Warrant  Stock to be issued  does not  include  all the
shares of Warrant Stock purchasable  hereunder,  it shall also state the name of
the  Person to whom a new  Warrant  for the  unexercised  portion  of the rights
hereunder is to be delivered.  Such Exercise Agreement shall be dated the actual
date of execution thereof.

                  Section 3.  Adjustment of Exercise Price and Number of Shares.
In order to prevent  dilution  of the rights  granted  under this  Warrant,  the
Exercise  Price shall be subject to adjustment  from time to time as provided in
this  Section  3, and the  number of shares of  Warrant  Stock  obtainable  upon
exercise of this  Warrant  shall be subject to  adjustment  from time to time as
provided in this Section 3.

                  3A.  Adjustment  of  Exercise  Price and Number of Shares upon
Issuance of Common Stock.






     (i) Except as set forth in Section  3A(iii),  if and  whenever  the Company
issues or sells,  or in  accordance  with Section 3B is deemed to have issued or
sold, any shares of Common Stock for a gross consideration per share (not net of
discounts and commissions to underwriters)  less than either (A) $11.00 (as such
amount is proportionately  adjusted for stock splits, stock combinations,  stock
dividends  and  recapitalizations  affecting  the Common Stock after the Date of
Issuance,  the  "Base  Price")  or (B) the  Market  Price  of the  Common  Stock
determined  as of the date of such  issue or sale,  then  immediately  upon such
issue or sale the Exercise  Price shall be reduced to whichever of the following
Exercise Prices is lower:

                                    (a)  the  Exercise   Price   determined   by
                  dividing (1) the sum of (x) the product derived by multiplying
                  the Exercise Price in effect  immediately  prior to such issue
                  or sale  by the  number  of  shares  of  Common  Stock  Deemed
                  Outstanding  immediately prior to such issue or sale, plus (y)
                  the gross  consideration (not net of discounts and commissions
                  to  underwriters),  if any,  received by the Company upon such
                  issue or sale,  by (2) the  number of  shares of Common  Stock
                  Deemed Outstanding immediately after such issue or sale; or

                                    (b)  the  Exercise   Price   determined   by
                  multiplying the Exercise Price in effect  immediately prior to
                  such issue or sale by a fraction, the numerator of which shall
                  be the sum of (1) the number of shares of Common  Stock Deemed
                  Outstanding immediately prior to such issue or sale multiplied
                  by the Market Price of the Common Stock  determined  as of the
                  date  of  such   issuance   of  sale,   plus  (2)  the   gross
                  consideration   (not  net  of  discounts  and  commissions  to
                  underwriters), if any, received by the Company upon such issue
                  or sale,  and the  denominator  of which  shall be the product
                  derived by multiplying the Market Price of the Common Stock by
                  the  number  of  shares of  Common  Stock  Deemed  Outstanding
                  immediately after such issue or sale.

     (ii) Upon each such adjustment of the Exercise Price hereunder,  the number
of shares of Warrant  Stock  acquirable  upon  exercise of this Warrant shall be
adjusted to the number of shares determined by multiplying the Exercise Price in
effect  immediately  prior to such adjustment by the number of shares of Warrant
Stock  acquirable  upon  exercise  of this  Warrant  immediately  prior  to such
adjustment and dividing the product thereof by the Exercise Price resulting from
such adjustment.

     (iii)  Notwithstanding  the foregoing,  there shall be no adjustment to the
Exercise Price or the number of shares of Warrant Stock obtainable upon exercise
of this Warrant with  respect to (w) the issuance and sale of Common  Stock,  or
the granting of any rights or options to subscribe for or purchase  Common Stock
or  Convertible  Securities,  pursuant to an  acquisition  by the Company or any
Subsidiary,  (x) the  granting  of any  rights or options  to  subscribe  for or
purchase Common Stock or Convertible Securities pursuant to the Company's Master
Stock  Incentive Plan  (including any of its component  plans) or 1998 Long-Term
Incentive Plan,  each as in effect on the Date of Issuance,  (y) the exercise of
such rights and options or (z) the issuance and sale of Common Stock pursuant to
the Employee Stock Purchase Plan, as in effect on the date hereof.






                  3B. Effect on Exercise Price of Certain  Events.  For purposes
of determining the adjusted Exercise Price under Section 3A, the following shall
be applicable:

                           (i) Issuance of Rights or Options.  If the Company in
         any  manner  grants  or sells any  Options  and the price per share for
         which Common Stock is issuable  upon the exercise of such  Options,  or
         upon conversion or exchange of any Convertible Securities issuable upon
         exercise  of such  Options,  is less than  either (a) the Base Price in
         effect  immediately  prior to the time of the  granting or sale of such
         Options or (b) the Market Price  determined  as of such time,  then the
         total  maximum  number  of shares of  Common  Stock  issuable  upon the
         exercise of such Options,  or upon  conversion or exchange of the total
         maximum  amount  of  such  Convertible  Securities  issuable  upon  the
         exercise of such Options, shall be deemed to be outstanding and to have
         been  issued  and sold by the  Company  at such time for such price per
         share.  For  purposes of this Section  3B(i),  the "price per share for
         which  Common Stock is issuable  upon  exercise of such Options or upon
         conversion or exchange of such Convertible Securities" is determined by
         dividing (A) the total  amount,  if any,  received or receivable by the
         Company as consideration for the granting or sale of such Options, plus
         the minimum aggregate amount of additional consideration payable to the
         Company upon the exercise of all such Options, plus in the case of such
         Options which are exercisable into Convertible Securities,  the minimum
         aggregate  amount of additional  consideration,  if any, payable to the
         Company upon the issuance or sale of such  Convertible  Securities  and
         the conversion or exchange thereof,  by (B) the total maximum number of
         shares of Common Stock  issuable  upon exercise of such Options or upon
         the conversion or exchange of all such Convertible  Securities issuable
         upon  the  exercise  of such  Options.  No  further  adjustment  of the
         Exercise  Price  shall be made upon the actual  issuance of such Common
         Stock  or of such  Convertible  Securities  upon the  exercise  of such
         Options  or  upon  the  actual  issuance  of  such  Common  Stock  upon
         conversion or exchange of such Convertible Securities.






                           (ii)  Issuance  of  Convertible  Securities.  If  the
         Company in any manner issues or sells any  Convertible  Securities  and
         the price per share for which Common Stock is issuable upon  conversion
         or  exchange  thereof is less than  either (a) the Base Price in effect
         immediately  prior to the time of such  issue or sale or (b) the Market
         Price  determined as of such time, then the maximum number of shares of
         Common Stock issuable upon  conversion or exchange of such  Convertible
         Securities  shall be deemed to be  outstanding  and to have been issued
         and sold by the Company for such price per share.  For the  purposes of
         this  Section  3B(ii),  the "price per share for which  Common Stock is
         issuable upon conversion or exchange thereof" is determined by dividing
         (A)  the  total  amount  received  or  receivable  by  the  Company  as
         consideration  for the  issue or sale of such  Convertible  Securities,
         plus the minimum aggregate amount of additional consideration,  if any,
         payable to the Company upon the conversion or exchange thereof,  by (B)
         the total  maximum  number of shares of Common Stock  issuable upon the
         conversion or exchange of all such Convertible  Securities.  No further
         adjustment of the Exercise Price shall be made upon the actual issue of
         such Common  Stock upon  conversion  or  exchange  of such  Convertible
         Securities,  and  if  any  such  issue  or  sale  of  such  Convertible
         Securities is made upon  exercise of any Options for which  adjustments
         of the  Exercise  Price  had been or are to be made  pursuant  to other
         provisions  of this Section 3B, no further  adjustment  of the Exercise
         Price shall be made by reason of such issue or sale.

                           (iii) Change in Option Price or  Conversion  Rate. If
         the  purchase  price  provided  for  in  any  Options,  the  additional
         consideration,  if any, payable upon the issue,  conversion or exchange
         of any  Convertible  Securities,  or the rate at which any  Convertible
         Securities  are  convertible  into or  exchangeable  for  Common  Stock
         changes at any time,  the Exercise  Price in effect at the time of such
         change shall be adjusted  immediately to the Exercise Price which would
         have  been in  effect  at such  time had such  Options  or  Convertible
         Securities still outstanding  provided for such changed purchase price,
         additional  consideration  or changed  conversion rate, as the case may
         be, at the time  initially  granted,  issued or sold and the  number of
         shares of Warrant Stock shall be correspondingly adjusted. For purposes
         of this Section 3B, if the terms of any Option or Convertible  Security
         which was  outstanding  as of the date of issuance of this  Warrant are
         changed in the manner described in the immediately  preceding sentence,
         then such Option or  Convertible  Security  and the Common Stock deemed
         issuable upon exercise,  conversion or exchange thereof shall be deemed
         to have been  issued as of the date of such  change;  provided  that no
         such change shall at any time cause the Exercise Price  hereunder to be
         increased.

                           (iv)  Treatment  of Expired  Options and  Unexercised
         Convertible  Securities.  Upon  the  expiration  of any  Option  or the
         termination  of any  right  to  convert  or  exchange  any  Convertible
         Securities  without the exercise of such Option or right,  the Exercise
         Price  then in  effect  and the  number  of  shares  of  Warrant  Stock
         acquirable  hereunder  shall be adjusted  immediately  to the  Exercise
         Price and the number of shares  which  would have been in effect at the
         time of such  expiration or termination  had such Option or Convertible
         Securities,  to  the  extent  outstanding  immediately  prior  to  such
         expiration  or  termination,  never been  issued.  For purposes of this
         Section 2B, the  expiration or termination of any Option or Convertible
         Security  which  was  outstanding  as of the date of  issuance  of this
         Warrant  shall not cause the  Exercise  Price  hereunder to be adjusted
         unless,  and only to the  extent  that,  a change  in the terms of such
         Option  or  Convertible  Security  caused  it to be deemed to have been
         issued after the date of issuance of this Warrant.






                           (v)  Calculation of  Consideration  Received.  If any
         Common Stock,  Options or Convertible  Securities are issued or sold or
         deemed to have been issued or sold for cash, the consideration received
         therefor  shall be deemed to be the net amount  received by the Company
         therefor.  In case any Common Stock, Options or Convertible  Securities
         are issued or sold for a  consideration  other than cash, the amount of
         the consideration  other than cash received by the Company shall be the
         fair  value of such  consideration,  except  where  such  consideration
         consists  of  securities,  in which  case the  amount of  consideration
         received by the  Company  shall be the Market  Price  thereof as of the
         date of  receipt.  In case any Common  Stock,  Options  or  Convertible
         Securities  are  issued to the  owners of the  non-surviving  entity in
         connection with any merger in which the Company is the surviving entity
         the  amount of  consideration  therefor  shall be deemed to be the fair
         value  of  such   portion  of  the  net  assets  and  business  of  the
         non-surviving  entity as is attributable to such Common Stock,  Options
         or  Convertible  Securities,  as the case may be. The fair value of any
         consideration other than cash or securities shall be determined jointly
         by the Company and the Registered Holder. If such parties are unable to
         reach  agreement  within a reasonable  period of time,  such fair value
         shall be  determined  by a recognized  investment  banking firm jointly
         selected by the Company and the Registered Holder. The determination of
         such  recognized  investment  banker  shall be final and binding on the
         Company and the  Registered  Holder of the  Warrants,  and the fees and
         expenses  of such  recognized  investment  banker  shall be paid by the
         Company.

                           (vi) Integrated  Transactions.  In case any Option is
         issued in connection with the issue or sale of other  securities of the
         Company,  together  comprising one  integrated  transaction in which no
         specific  consideration  is  allocated  to such  Options by the parties
         thereto,  the  Options  shall be  deemed to have  been  issued  without
         consideration.

                           (vii) Treasury Shares. The number of shares of Common
         Stock  outstanding  at any given time does not include  shares owned or
         held by or for the  account of the Company or any  Subsidiary,  and the
         disposition of any shares so owned or held shall be considered an issue
         or sale of Common Stock.

                           (viii)  Record Date. If the Company takes a record of
         the holders of Common  Stock for the purpose of  entitling  them (A) to
         receive a  dividend  or other  distribution  payable  in Common  Stock,
         Options  or in  Convertible  Securities  or  (B)  to  subscribe  for or
         purchase  Common Stock,  Options or Convertible  Securities,  then such
         record  date shall be deemed to be the date of the issue or sale of the
         shares of  Common  Stock  deemed  to have been  issued or sold upon the
         declaration  of such dividend or the making of such other  distribution
         or the date of the granting of such right of  subscription or purchase,
         as the case may be.

                  3C. Subdivision or Combination of Common Stock. If the Company
at any time subdivides (by any stock split, stock dividend,  recapitalization or
otherwise) one or more classes of its outstanding  shares of Common Stock into a
greater number of shares, the Exercise Price in effect immediately prior to such
subdivision shall be proportionately reduced and the number of shares of Warrant
Stock  obtainable  upon  exercise  of  this  Warrant  shall  be  proportionately
increased.  If the  Company at any time  combines  (by  reverse  stock  split or
otherwise) one or more classes of its outstanding  shares of Common Stock into a
smaller number of shares, the Exercise Price in effect immediately prior to such
combination  shall be  proportionately  increased  and the  number  of shares of
Warrant Stock obtainable upon exercise of this Warrant shall be  proportionately
decreased.






                  3D. Reorganization, Reclassification, Consolidation, Merger or
Sale.  Except as  provided in Section 9, any  recapitalization,  reorganization,
reclassification, consolidation, merger, sale of all or substantially all of the
Company's assets or other transaction,  which in each case is effected in such a
way that the holders of Common Stock are entitled to receive (either directly or
upon subsequent  liquidation) stock,  securities or assets with respect to or in
exchange  for Common Stock is referred to herein as "Organic  Change."  Prior to
the  consummation  of any Organic  Change,  the Company  shall make  appropriate
provision  (in form and  substance  satisfactory  to the  Registered  Holder) to
insure that the Registered Holder shall thereafter have the right to acquire and
receive,  in lieu of or  addition  to (as the case may be) the shares of Warrant
Stock  immediately  theretofore  acquirable and receivable  upon the exercise of
this  Warrant,  such shares of stock,  securities  or assets as may be issued or
payable with respect to or in exchange for the number of shares of Warrant Stock
immediately  theretofore acquirable and receivable upon exercise of this Warrant
had such Organic  Change not taken place.  In any such case,  the Company  shall
make appropriate provision (in form and substance satisfactory to the Registered
Holder) with respect to the Registered  Holders'  rights and interests to insure
that  the  provisions  of this  Section  3 and  Sections  4 and 5  hereof  shall
thereafter be applicable to the Warrants.  The Company shall not effect any such
consolidation,  merger or sale,  unless prior to the consummation  thereof,  the
successor  entity (if other than the Company)  resulting from  consolidation  or
merger or the entity  purchasing  such assets assumes by written  instrument (in
form and substance  satisfactory  to the Registered  Holder),  the obligation to
deliver to the Registered Holder such shares of stock,  securities or assets as,
in  accordance  with the  foregoing  provisions,  such holder may be entitled to
acquire.

                  3E.  Certain   Events.   If  any  event  occurs  of  the  type
contemplated by the provisions of this Section 3 but not expressly  provided for
by such  provisions  (including,  without  limitation,  the  granting  of  stock
appreciation  rights,  phantom stock rights or other rights with equity features
(except in each case  pursuant to the  Company's  Master  Stock  Incentive  Plan
(including any of its component plans) or 1998 Long-Term Incentive Plan, each as
in effect on the Date of Issuance)), then the Company's board of directors shall
make an appropriate adjustment in the Exercise Price and the number of shares of
Warrant  Stock  obtainable  upon  exercise of this  Warrant so as to protect the
rights of the Registered Holder; provided that no such adjustment shall increase
the Exercise Price or decrease the number of shares of Warrant Stock  obtainable
as otherwise determined pursuant to this Section 3.

                  3F.      Notices.

     (i)  Immediately  upon any  adjustment of the Exercise  Price,  the Company
shall give written  notice thereof to the  Registered  Holder,  setting forth in
reasonable detail and certifying the calculation of such adjustment.

     (ii) The Company  shall give  written  notice to the  Registered  Holder at
least 20 days prior to the date on which the Company closes its books or takes a
record (A) with respect to any dividend or  distribution  upon the Common Stock,
(B) with respect to any pro rata  subscription  offer to holders of Common Stock
or (C) for determining  rights to vote with respect to any Organic Change,  Sale
of the Company, dissolution or liquidation.

     (iii) The Company shall also give written notice to the Registered  Holders
at least 20 days prior to the date on which any Organic  Change,  dissolution or
liquidation shall take place.





                  Section 4. Liquidating  Dividends.  If the Company declares or
pays a dividend  upon the Common  Stock  payable  otherwise  than in cash out of
earnings or earned  surplus  (determined  in accordance  with GAAP) except for a
stock  dividend  payable in shares of Common Stock (a  "Liquidating  Dividend"),
then the  Company  shall pay to the  Registered  Holder  at the time of  payment
thereof the  Liquidating  Dividend  which would have been paid to the Registered
Holder on the Warrant Stock (after netting out the Aggregate Exercise Price) had
this  Warrant  been  fully  exercised  immediately  prior to the date on which a
record is taken for such  Liquidating  Dividend,  or, if no record is taken, the
date as of which the record  holders of Common Stock  entitled to such dividends
are to be determined.

                  Section 5. Purchase Rights. If at any time the Company grants,
issues or sells any Options, Convertible Securities or rights to purchase stock,
warrants,  securities  or other  property pro rata to the record  holders of any
class of Common Stock (the "Purchase Rights"),  then the Registered Holder shall
be entitled to acquire,  upon the terms applicable to such Purchase Rights,  the
aggregate  Purchase  Rights  which  such  holder  could  have  acquired  if  the
Registered Holder had held the number of shares of Warrant Stock acquirable upon
complete exercise of this Warrant  immediately before the date on which a record
is taken for the grant, issuance or sale of such Purchase Rights, or, if no such
record is taken,  the date as of which the record holders of Common Stock are to
be determined for the grant, issue or sale of such Purchase Rights.

                  Section 6.  Company's Right to Require Exercise.






                  6A. Requirement Notice.  Subject to Section 6B, if on any date
during the Exercise  Period the daily  closing sales price of a share of Warrant
Stock  quoted on NASDAQ  equals or exceeds  $11.00 per share (as such  amount is
proportionately  adjusted for stock splits, stock combinations,  stock dividends
and  recapitalizations  affecting  the Warrant Stock after the Date of Issuance)
for the 20 consecutive  trading days immediately prior to such date, the Company
may, by giving  written  notice  (the  "Requirement  Notice") to the  Registered
Holder within three business days of such date, require the Registered Holder to
exercise,  in whole  or in part  (but not as to a  fractional  share of  Warrant
Stock),  the purchase rights represented by this Warrant within 15 business days
of receipt of the  Requirement  Notice;  provided,  however such 15 business day
period  shall be  extended  to the  extent  necessary  for the  Company  and the
Registered Holder to make any filings with any governmental  body, NASDAQ or any
stock  exchange in which the Warrant  Stock is listed or obtain any approvals of
any governmental  body, NASDAQ, any stock exchange in which the Warrant Stock is
listed or the  stockholders of the Company  (including  those in connection with
under the HSR Act) required prior to or in connection  with any exercise of this
Warrant.  Except as explicitly set forth in this Section 6, the exercise of this
Warrant  shall follow the  procedures  set forth in Section 2B.  Notwithstanding
anything in this Section 6 to the contrary,  the  Registered  Holder can satisfy
its  obligations  under this  Section 6 by assigning  this  Warrant  pursuant to
Section 8 to another Person (the "Assignee")  within 10 business days of receipt
of the  Requirement  Notice,  so long as the  Assignee  exercises  the  assigned
Warrant within 10 business days of such  assignment;  provided,  however such 10
business  day period shall be extended to the extent  necessary  for the Company
and the Assignee to make any filings with any governmental  body,  NASDAQ or any
stock  exchange in which the Warrant  Stock is listed or obtain any approvals of
any governmental  body, NASDAQ, any stock exchange in which the Warrant Stock is
listed or the  stockholders of the Company  (including  those in connection with
under the HSR Act) required  prior to or in connection  with any exercise of the
assigned Warrant.

                  6B.    Conditional    Precedent   to    Requirement    Notice.
Notwithstanding  anything in Section 6A to the contrary,  the obligations of the
Registered  Holder or the  Assignee,  as  applicable,  under Section 6A shall be
subject to the Registered Holder or the Assignee, as applicable, having received
on or before the date of the closing of the exercise of the Warrant  pursuant to
this  Section  6 (the  "Requirement  Date") a  certificate  signed  by the chief
executive officer of the Company certifying that as of the Requirement Date, (x)
the  representations and warranties of the Company set forth in the Common Stock
Purchase Agreement shall be true, correct and complete in all respects on and as
of the  Requirement  Date to the same  extent as  though  made on and as of such
date,  except to the extent such  representations  and  warranties  specifically
related to an earlier date, in which case such  representations  and  warranties
shall have been true,  correct and  complete  in all  respects on and as of such
earlier date (provided that the  requirements of this clause (x) shall be deemed
satisfied unless all inaccuracies of such  representations and warranties in the
aggregate  have a Material  Adverse  Effect,  ignoring any  qualification  as to
materiality or Material Adverse Effect contained therein), (y) the Company shall
have performed in all material  respects all  agreements  which the Common Stock
Purchase  Agreement  provides  shall be  performed  by the  Company  and (z) the
Company is not subject to any debt or credit agreement under which a default, an
event of default,  a right of acceleration or a right to bring an action against
any  property of the Company may be  triggered if (A) Phillip G. Norton does not
maintain  effective  control  of the  Company  or MLC  Group,  Inc.,  or (B) any
specified  Person does not own any  specified  number or percentage of shares of
Common Stock (provided,  however, such agreement can provide a default, an event
of default,  a right of  acceleration  or a right to bring an action against any
property  of the  Company  may be  triggered  if (1) one or more of  Phillip  G.
Norton,  Patricia A. Norton, any of their lineal descendants or siblings and any
trust  formed  and  maintained  solely  for  the  benefit  of any  such  Persons
beneficially  owns in the aggregate less than 1,600,000  shares of Common Stock,
or (2) one or more of Phillip G. Norton,  Bruce M. Bowen, Thomas B. Howard, Jr.,
Steven J. Mencarini, Kleyton L. Parkurst, any other employee of the Company, any
of their  lineal  descendants,  siblings  or  spouses  and any trust  formed and
maintained  solely for the benefit of any such Persons  beneficially owns in the
aggregate less than 2,000,000 shares of Common Stock).

                  6C. No Manipulation.  Each of the parties hereto hereby agrees
that neither it nor any of its Affiliates  shall take any action or omit to take
any action which increases or decreases the daily closing sales price of a share
of Warrant Stock quoted on NASDAQ for the primary  purpose of effecting  whether
or not the  Company  shall have the right to require  the  Registered  Holder to
exercise, in whole or in part, the purchase rights represented by this Warrant.






                  Section 7. No Voting Rights; Limitations of Liability.  Except
as otherwise  provided in the  Stockholders  Agreement,  this Warrant  shall not
entitle the holder  hereof to any voting rights or other rights as a stockholder
of the Company. No provision hereof, in the absence of affirmative action by the
Registered  Holder to purchase Warrant Stock,  and no enumeration  herein of the
rights or privileges of the  Registered  Holder shall give rise to any liability
of such holder for the Exercise  Price of Warrant  Stock  acquirable by exercise
hereof or as a stockholder of the Company.

                  Section 8. Warrant Transferable.  Subject to federal and state
securities  laws,  this Warrant and all rights  hereunder are  transferable,  in
whole or in part,  without  charge to the Registered  Holder,  upon surrender of
this Warrant with a properly  executed  Assignment at the address of the Company
set forth in Section 12.

                  Section  9.  Sale  of the  Company.  Notwithstanding  anything
herein the contrary,  prior to the  consummation  of a Sale of the Company,  the
Registered Holder shall be given the option,  in its sole discretion,  to either
(x) exercise this Warrant prior to the  consummation  of the Sale of the Company
and  participate in such sale as a holder of such class of Common Stock,  or (y)
upon the  consummation of the Sale of the Company,  receive in exchange for this
Warrant consideration equal to the amount determined by multiplying (1) the same
amount of consideration per share of a class of Common Stock received by holders
of such class of Common  Stock in  connection  with the  Approved  Sale less the
Exercise  Price by (2) the  number  of  shares  of such  class of  Common  Stock
represented by this Warrant.

                  Section 10. Warrant Exchangeable for Different  Denominations.
This Warrant is exchangeable, upon the surrender hereof by the Registered Holder
at the address of the Company set forth in Section 12, for new  Warrants of like
tenor  representing in the aggregate the purchase rights hereunder,  and each of
such new Warrants  shall  represent such portion of such rights as is designated
by the  Registered  Holder at the time of such  surrender.  The date the Company
initially  issues  this  Warrant  shall be deemed  to be the "Date of  Issuance"
hereof  regardless  of the  number of times new  certificates  representing  the
unexpired and unexercised  rights formerly  represented by this Warrant shall be
issued. Each holder of a new Warrant shall have the rights and privileges of the
Registered Holder of this Warrant as provided herein.

                  Section 11.  Replacement.  Upon receipt of evidence reasonably
satisfactory  to the Company (an  affidavit  of the  Registered  Holder shall be
satisfactory) of the ownership and the loss, theft, destruction or mutilation of
any certificate evidencing this Warrant, and in the case of any such loss, theft
or destruction, upon receipt of indemnity reasonably satisfactory to the Company
(provided that if the Registered  Holder is Thayer Equity Investors III, L.P. or
any of its Affiliates, then its own agreement shall be satisfactory), or, in the
case of any such  mutilation  upon  surrender of such  certificate,  the Company
shall (at its  expense)  execute and deliver in lieu of such  certificate  a new
certificate of like kind representing the same rights  represented by such lost,
stolen,  destroyed  or  mutilated  certificate  and dated the date of such lost,
stolen, destroyed or mutilated certificate.

                  Section 12.  Notices.  Any notice provided for in this Warrant
shall be in  writing  and  shall be  either  personally  delivered,  or sent via
facsimile,  or mailed  first class mail  (postage  prepaid) or sent by reputable
overnight courier service (charges prepaid) to such Person as follows:

                  if to the Company:

                           MLC Holdings, Inc.
                           11150 Sunset Hills Road, Suite 110
                           Reston, VA 20190-5321





                           FAX:             703-834-5718
                           Attention:       Phillip G. Norton

                  with a copy to:

                           Alston & Bird, LLP
                           601 Pennsylvania Avenue, N.W.
                           North Building, 11th Floor
                           Washington, DC 20004
                           FAX:             202-508-3333
                           Attention:       Frank M. Conner, III, Esq.

                  if to the Registered Holder:

                           c/o Thayer Equity Investors III, L.P.
                           1455 Pennsylvania Avenue, Suite 350
                           Washington, DC 20004
                           FAX:             202-371-0391
                           Attention:       Carl J. Rickertsen

                  with a copy to:

                           Kirkland & Ellis
                           655 Fifteenth Street, N.W., Suite 1200
                           Washington, DC  20005-5793
                           FAX:                      202-879-5200
                           Attention:       Jack M. Feder, Esq.

or at such address or to the  attention  of such other  Person as the  recipient
party has specified by prior written notice to the sending  party.  Notices will
be deemed to have been given  hereunder  when  delivered  personally or sent via
facsimile  (against receipt  therefor),  five business days after deposit in the
U.S. mail and one business day after deposit with a reputable  overnight courier
service.
                  Section 13. Amendment and Waiver. Except as otherwise provided
herein,  the  provisions of this Warrant may be amended and the Company may take
any action herein  prohibited,  or omit to perform any act herein required to be
performed  by it, only if the Company has  obtained  the written  consent of the
Registered Holder.






                  Section  14.   Descriptive   Headings;   Governing   Law.  The
descriptive  headings of the several  sections of this  Warrant are inserted for
convenience  only and do not constitute a part of this Warrant.  The corporation
laws of the State of Delaware  shall govern all issues  concerning  the relative
rights of the Company and its stockholders.  All other questions  concerning the
construction,  validity, enforcement and interpretation of this Warrant shall be
governed by the internal law of the State of Delaware,  without giving effect to
any choice of law or conflict of law  provision or rule (whether of the State of
Delaware or any other  jurisdictions)  that would cause the  application  of the
laws of any jurisdictions other than the State of Delaware.

                                                 *     *     *     *






                  IN WITNESS WHEREOF, the Company has caused this Stock Purchase
Warrant to be signed and  attested  by its duly  authorized  officers  under its
corporate seal and to be dated the Date of Issuance hereof.


                            MLC HOLDINGS, INC.



                            By:      /s/ BRUCE M. BOWEN
                                     Name:    Bruce M. Bowen
                                     Title:   Executive Vice President


                            [Corporate Seal]

                            Attest:

                            /s/ KLEYTON L. PARKHURST
                            ------------------------------------
                            Kleyton L. Parkhurst, Secretary


ACKNOWLEDGED AND AGREED TO
AS OF THE DATE OF ISSUANCE:

TC LEASING, LLC

By:      THAYER EQUITY INVESTORS III, L.P., its managing member

By:      TC EQUITY PARTNERS, L.L.C., its general partner


By:      /S/ JEFFREY W. GOETTMAN
- --------------------------------
         Name: Jeffrey W. goettman
         Title:Member






                                                                      

                               EXERCISE AGREEMENT


Dated: _____________

                  The  undersigned,  pursuant to the provisions set forth in the
attached Stock  Purchase  Warrant  (Certificate  No.  W-____),  hereby agrees to
subscribe for the purchase of ______ shares of the Warrant Stock covered by such
Stock Purchase  Warrant and makes payment herewith in full therefor at the price
per share provided by such Stock Purchase Warrant. A certificate for such shares
of Warrant Stock shall be made in the name of _______________________, and shall
be mailed  to the  following  address:___________________________.  [A new stock
purchase  warrant for the  unexercised  portion of the rights under the attached
Stock  Purchase  Warrant shall be issued in the name of  ______________________,
and shall be mailed to the following address:
- ---------------------------------.]


                     Name of Registered Holder: ___________________________


                     Signature:   _______________________________________
                     Name:        _______________________________________
                     Title:       _______________________________________







                                                                   

                                   ASSIGNMENT


Dated:   ______________

                  FOR VALUE RECEIVED,  _________________________________  hereby
sells,  assigns and  transfers  all of the rights of the  undersigned  under the
attached Stock Purchase  Warrant  (Certificate  No. W-_____) with respect to the
number of shares of the Warrant Stock covered thereby set forth below, unto:

Names of Assignee                  Address                         No. of Shares
- -----------------                  -------                         -------------




                           Name of Assignor: ___________________________________



                           Signature:        ___________________________________
                           Name:             ___________________________________
                           Title:            ___________________________________