Document:

EXHIBIT 10.18

                 AMENDMENT TO AGREEMENT FOR WHOLESALE FINANCING

     This Amendment to Agreement for Wholesale Financing is made to that certain
Agreement for Wholesale Financing entered into by and between GTSI Corp. (f/k/a
Government Technology Services, Inc.) ("Dealer") and Deutsche Financial Services
Corporation ("DFS") as of June 27, 1996, as amended ("Agreement").

     FOR VALUE RECEIVED, Dealer and DFS agree to amend the Agreement as follows:

     1.   All references in the Agreement to "Government Technology Services,
Inc." shall be deemed to be references to "GTSI Corp."

     2.   Dealer hereby confirms its understanding of the discretionary nature
of its credit facility established pursuant to the terms of the Agreement. The
foregoing notwithstanding, DFS hereby confirms that it has established a
facility available for Dealer's inventory purchases under the terms of the
Agreement in the amount of Thirty-five Million Dollars ($35,000,000). DFS is not
permitted to increase the foregoing facility amount without the prior written
consent of a majority, by number, of the "Lenders" (as that terms is defined in
the Credit Agreement), excluding DFS as a Lender for purposes of such
calculation.

     3.   The following paragraph shall be incorporated into the Agreement as if
fully and originally set forth therein and shall replace in their entirety any
previous provisions concerning the subject matter hereof:

     "Financial Covenants. Dealer agrees that it will:

          (a) as of the last day of each calendar quarter set forth below,
          maintain a Tangible Net Worth plus Subordinated Debt in the combined
          amount of not less than the amount shown below for the period
          corresponding thereto:

          Period                                                        Amount
          ------                                                        ------

          Calendar quarter ending 9/30/00                           $40,000,000

          Calendar quarter ending 12/31/00                          $40,000,000

          Calendar quarter ending 3/31/01                           $40,000,000

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          Calendar quarter ending 6/30/01                           $40,000,000;

          (b) as of the last day of each calendar quarter set forth below,
          maintain a ratio of Debt minus Subordinated Debt to Tangible Net Worth
          plus Subordinated Debt of not more than the amount shown below for the
          period corresponding thereto:

          Period                                                        Ratio
          ------                                                        -----

          Calendar quarter ending 09/30/00                           7.0 to 1.0

          Calendar quarter ending 12/31/00                           4.0 to 1.0

          Calendar quarter ending 3/31/01                            4.0 to 1.0

          Calendar quarter ending 6/30/01                            4.0 to 1.0;

          (c) as of the last day of each calendar quarter set forth below,
          maintain a ratio of Current Assets to current liabilities of not less
          than the amount shown below for the period corresponding thereto:

          Period                                                        Ratio
          ------                                                        -----

          Calendar quarter ending 9/30/00                            1.1 to 1.0

          Calendar quarter ending 12/31/00                           1.2 to 1.0

          Calendar quarter ending 3/31/01                            1.2 to 1.0

          Calendar quarter ending 6/30/01                            1.2 to 1.0;

          (d) for the fiscal year of Borrower ending December 31, 2000, and each
          fiscal year-end thereafter, Borrower shall achieve net income, before
          giving effect to provisions for income taxes, of at least Two Million
          Dollars ($2,000,000.00).

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<PAGE>

          Prior to September 30, 2001, Agent and Borrower shall renegotiate the
          above financial covenants for application to any subsequent periods of
          this Agreement. If on or prior to September 30, 2001, the parties fail
          to execute a written amendment to this Agreement providing for such
          revised financial covenants for any subsequent periods of this
          Agreement, then the above financial covenants in effect for the
          calendar quarter ending June 30, 2001, shall be and remain in effect,
          until such amendment is executed and in full force and effect.

For purposes of this paragraph: (i) "Tangible Net Worth" means the book value of
Borrower's assets less liabilities (including as liabilities all recorded
reserves for contingencies and other potential liabilities), excluding from such
assets all Intangibles; (ii) "Intangibles" means and includes general
intangibles (as that term is defined in the UCC); accounts receivable and
advances due from officers, directors, member, owner, employees, stockholders
and affiliates; leasehold improvements net of depreciation; licenses; good will;
prepaid expenses (except for those determined by Agent, in its sole discretion,
not to be Intangible); escrow deposits (except for those determined by Agent, in
its sole discretion, not to be Intangible); covenants not to compete; the excess
of cost over book value of acquired assets; franchise fees; organizational
costs; finance reserves held for recourse obligations; capitalized research and
development costs; and such other similar items as DFS may from time to time
determine in DFS' sole discretion; (iii) "Debt" means all of Borrower's
liabilities and indebtedness for borrowed money of any kind and nature
whatsoever, whether direct or indirect, absolute or contingent, and including
obligations under capitalized leases, guaranties or with respect to which
Borrower has pledged assets to secure performance, whether or not direct
recourse liability has been assumed by Borrower; (iv) "Subordinated Debt" means
all of Borrower's Debt which is subordinated to the payment of Borrower's
liabilities to the Lenders by an agreement in form and substance satisfactory to
Agent; and (v) "Current Assets" means Borrower's current assets. The foregoing
terms will be determined in accordance with GAAP consistently applied, and, if
applicable, on a consolidated basis ("Financial Covenants")."

4.   Each and every reference in the Agreement to the "Credit Agreement" shall
     be deemed to refer to that certain Second Amended and Restated Business
     Credit and Security Agreement among Dealer, DFS, DFS as agent, and certain
     lenders named therein, dated on July 28, 1997, as amended from time to
     time.

5.   Paragraph number 9 of the Agreement shall be deleted in its entirety and
     replaced with the following:

"9.  Payment Terms/Paydown. Dealer will immediately pay DFS the principal
     indebtedness owed DFS on each item of Collateral financed by DFS (as shown
     on the Statement of Transaction identifying such Collateral) on the
     earliest occurrence of any of the following events: (a) when such
     Collateral is lost, stolen or damaged; (b) for Collateral financed under
     Pay-As-Sold ("PAS") terms (as shown on the Statement of Transaction
     identifying such Collateral), when such

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<PAGE>

     Collateral is sold, transferred, rented, leased, otherwise disposed of or
     matured; (c) in strict accordance with any curtailment schedule for such
     Collateral (as shown on the Statement of Transaction identifying such
     Collateral); (d) for Collateral financed under Scheduled Payment Program
     ("SPP") terms (as shown on the Statement of Transaction identifying such
     Collateral), in strict accordance with the installment payment schedule;
     and (e) when otherwise required under the terms of any financing program
     agreed to in writing by the parties.

     Dealer will forward to DFS by the 10th day of each month a Collateral
     Summary Report (as defined below) dated as of the last day of the prior
     month. Regardless of the SPP terms pertaining to any Collateral financed by
     DFS, and notwithstanding any scheduled payments made by Dealer after the
     Determination Date (as defined below), if DFS determines, after reviewing
     the Collateral Summary Report, after conducting an inspection of the
     Collateral or otherwise, that (i) Collateral Liquidation Value as of the
     Determination Date is less than (ii) One Hundred and Twenty-Five Percent
     (125%) of the total current outstanding indebtedness owed by Dealer to DFS
     as of the date of the Collateral Summary Report, inspection or any other
     date on which a paydown is otherwise required hereunder, as applicable (the
     'Determination Date'), Dealer will immediately upon demand pay to DFS the
     amount necessary so that the Collateral Liquidation Value as of the
     Determination Date equals or exceeds One Hundred and Twenty-Five Percent
     (125%) of the total current outstanding indebtedness owed by Dealer as of
     the Determination Date.

     The term 'Collateral Summary Report' is defined herein to mean a report
     compiled by Dealer specifying: (a) the total aggregate wholesale invoice
     price of all of Dealer's inventory financed by DFS that is unsold and in
     Dealer's possession and control as of the date of such Report; and (b) the
     total aggregate wholesale invoice price of all of Dealer's inventory not
     financed by DFS that is unsold and in Dealer's possession and control as of
     the date of such Report: in each case to the extent DFS has a first
     priority, fully perfected security interest therein.

     The term 'Collateral Liquidation Value' is defined herein to mean: (a) one
     hundred percent (100%) of the total aggregate wholesale invoice price of
     all of Dealer's inventory financed by DFS that is unsold, in unopened boxes
     or other containers, as applicable, and in Dealer's possession and control
     as of the date of the Collateral Summary Report and not aged more than six
     (6) months from the date of invoice, and (b) fifty percent (50%) of the
     total aggregate wholesale invoice price of all Dealer's inventory not
     financed by DFS that is unsold, in unopened boxes or other containers, as
     applicable, and in Dealer's possession and control as of the date of the
     Collateral Summary Report and not aged more than six (6) months from the

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<PAGE>

     date of invoice; in each case to the extent DFS has a first priority, fully
     perfected security interest therein subject to the terms of that certain
     Subordination Agreement dated as of July 28, 1997 among DFS, in its
     individual capacity, DFS, as agent, and certain lenders named therein;.

     If Dealer from time to time is required to make immediate payment to DFS of
     any past due obligation discovered during any Collateral audit, upon review
     of a Collateral Summary Report or at any other time, Dealer agrees that
     acceptance of such payment by DFS shall not be construed to have waived or
     amended the terms of its financing program. The proceeds of any Collateral
     received by Dealer will be held by Dealer in trust for DFS' benefit, for
     application as provided in this Agreement. Dealer will send all payments to
     DFS' branch office(s) responsible for Dealer's account. DFS may apply: (i)
     payments to reduce finance charges first and then principal, regardless of
     Dealer's instructions; and (ii) principal payments to the oldest (earliest)
     invoice for Collateral financed by DFS, but, in any event, all principal
     payments will first be applied to such Collateral which is sold, lost,
     stolen, damaged, rented, leased, or otherwise disposed of or unaccounted
     for. Any third party discount, rebate, bonus or credit granted to Dealer
     for any Collateral will not reduce the debt Dealer owes DFS until DFS has
     received payment therefor in cash. Dealer will: (1) pay DFS even if any
     Collateral is defective or fails to conform to any warranties extended by
     any third party; (2) not assert against DFS any claim or defense Dealer has
     against any third party; and (3) indemnify and hold DFS harmless against
     all claims and defenses asserted by any buyer of the Collateral relating to
     the condition of, or any representations regarding, any of the Collateral.
     Dealer waives all rights of offset and counterclaims Dealer may have
     against DFS."

     All other terms as they appear in the Agreement, to the extent consistent
with the foregoing, are ratified and remain unchanged and in full force and
effect.

     IN WITNESS WHEREOF, Dealer and DFS have executed this Amendment to
Agreement for Wholesale Financing this 13th day of March, 2001.

                                        GTSI Corp.

ATTEST:                            By:_________________________

                                   Title:______________________

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<PAGE>

                                                 (Assistant) Secretary

                                         DEUTSCHE FINANCIAL SERVICES CORPORATION

                                         By:____________________________________

                                         Title:_________________________________

                                       38EXHIBIT 10.19

                                 SIXTH AMENDMENT

     THIS SIXTH AMENDMENT ("Amendment") is entered into as of the 26th day of
February, 2002 by and among Deutsche Financial Services Corporation ("DFS"), as
Agent and a Lender ("Agent"), the other Lenders party hereto ("Lenders") and
GTSI Corp. f/k/a Government Technology Services, Inc. ("Borrower").

                                    RECITALS

     Agent, Lenders (and/or their successors by assignment, as applicable) and
Borrower are parties to that certain Second Amended and Restated Business Credit
and Security Agreement dated as of July 28, 1997 (as amended from time to time,
the "Credit Agreement"; terms used herein and not otherwise defined shall have
the meanings set forth in the Credit Agreement). Borrower, Lenders and Agent now
desire to amend certain provisions of the Credit Agreement subject to the terms
hereof.

     NOW, THEREFORE, in consideration of the forgoing premises and for other
good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties agree as follows:

     1. Definitions. The definition of "Permitted Liens" in Section 2 of the
Credit Agreement is hereby amended by adding the following to the end thereof:

     "; and (h) Liens in favor of DFS (in its individual capacity and not as an
Agent on behalf of the Lenders) and IBM Credit Corporation (each a "Secured
Creditor"), provided that a subordination agreement is at all times in effect
among the Secured Creditor, Agent and Lenders."

     2. Credit Facility. Notwithstanding anything to contrary in Section 3 of
the Agreement, Agent and the Lenders hereby agree, subject to the terms and
conditions of this Agreement, to temporarily increase Borrower's `Total Credit',
such that its aggregate revolving credit facility shall be up to Fifty Million
Dollars ($50,000,000) through March 31, 2002. On April 1, 2002, Borrower's
aggregate revolving credit facility will automatically revert to up to Thirty
Million Dollars ($30,000,000) for the remainder of the First Seasonal Period as
provided in the Agreement and without further notice from DFS. Each Lender
agrees and confirms that through March 31, 2002, its Commitment and
corresponding Pro Rata Share shall be as provided in the Agreement for the
Fourth Seasonal Period.

     3. Borrowing Base. Section 3.2 of the Credit Agreement is hereby deleted in
its entirety and replaced with the following:

     "3.2 Borrowing Base. On receipt of each Borrowing Base Certificate in form
and substance acceptable to Agent, which shall be delivered with each Notice of
Borrowing and at least weekly (the "Borrowing Base Certificate"), Agent will
credit Borrower with the lesser of:

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(A) Borrower's Total Credit, and (B) the remainder of (i) eighty-five percent
(85%) of the net amount of the Eligible Accounts which are, absent error or
other discrepancy, listed in such Borrowing Base Certificate, minus (ii) the
face amount of all letters of credit issued of guaranteed by an LC Guarantying
Lender, minus (iii) a reserve in the amount of Ten Million Dollars ($10,000,000)
(the "Inventory Reserve"), and minus (iv) all other reserves established by DFS
in accordance with Section 3.12 of this Agreement. For purposes hereof, the net
amount of Eligible Accounts at any time shall be the face amount of such
Eligible Accounts less any and all returns, discounts (which may, at Agent's
option, be calculated on shortest terms), credits, rebates, allowances, or
excise taxes of any nature at any time issued, owing claimed by Account Debtors,
granted, outstanding, or payable in connection with such Accounts at such time."

     4. Establishment of Reserves. Section 3.12 of the Credit Agreement is
hereby amended by adding the following new sentence to the end thereof:

"In addition to the foregoing and not in limitation thereof, Agent and the
Lenders agree that, if a Default has occurred and is continuing under this
Agreement, DFS may not receive payments from Borrower under its inventory credit
facility from Accounts constituting the Inventory Reserve (as such term is
defined in Section 3.2) until such time as all of the Obligations owed to Agent
and Lenders under this Agreement have been paid in full."

     5. Total Indebtedness. Section 9.2.12 of the Credit Agreement is hereby
deleted in its entirety and replaced with the following:

          "9.2.12 Total Indebtedness. Borrower shall not create, incur, assume
or suffer to exist, or permit any Subsidiary to create, incur or suffer to
exist, any Indebtedness, except:

        (i)     the Obligations;

        (ii)    Subordinated Debt;

        (iii)   Indebtedness of any Subsidiary to Borrower not to exceed
                $250,000 at any time;

        (iv)    unsecured Accounts payable to trade creditors and current
                operating expenses (other than for money borrower) incurred in
                the ordinary course of business which are aged not more than
                thirty (30) days past due, unless proceedings, and for which
                adequate reserves have been established in accordance with GAAP;

        (v)     Obligations to pay Rentals permitted by Section 9.2.19;

        (vi)    Indebtedness not otherwise permitted by Section 9.2.12 which
                does not exceed at any time, in the aggregate, the sum of
                $2,000,000;

        (vii)   Permitted Purchase Money Indebtedness; or

        (viii)  Indebtedness of Borrower to DFS (in its individual capacity, and
                not as an Agent or a Lender under this Agreement) and IBM Credit
                Corporation, which is secured by a Permitted Lien.

     6. Financial Covenants. Section 9.3.1 of the Credit Agreement is hereby
deleted in its entirety and replaced with the following:

          "9.3.1 Amounts. Borrower agrees that it will:

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     (a) as of the last day of each calendar quarter set forth below, maintain a
     Tangible Net Worth plus Subordinated Debt in the combined amount of not
     less than the amount shown below for the period corresponding thereto:

     Period                                                           Amount
     ------                                                           ------

     Calendar quarter ending 3/31/02                               $40,000,000

     Calendar quarter ending 6/30/02                               $40,000,000

     Calendar quarter ending 9/30/02                               $40,000,000

     Calendar quarter ending 12/31/02                              $40,000,000;

     (b) as of the last day of each calendar quarter set forth below, maintain a
     ratio of Debt minus Subordinated Debt to Tangible Net Worth plus
     Subordinated Debt of not more than the amount shown below for the period
     corresponding thereto:

     Period                                                            Ratio
     ------                                                            -----

     Calendar quarter ending 3/31/02                                 4.0 to 1.0

     Calendar quarter ending 6/30/02                                 4.0 to 1.0

     Calendar quarter ending 09/30/02                                7.0 to 1.0

     Calendar quarter ending 12/31/02                                4.0 to 1.0;

     (c) as of the last day of each calendar quarter set forth below, maintain a
     ratio of Current Assets to current liabilities of not less than the amount
     shown below for the period corresponding thereto:

     Period                                                           Ratio
     ------                                                           -----

     Calendar quarter ending 3/31/02                               1.20 to 1.0

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<PAGE>

     Calendar quarter ending 6/30/02                               1.20 to 1.0

     Calendar quarter ending 9/30/02                               1.10 to 1.0

     Calendar quarter ending 12/31/02                              1.20 to 1.0;

     (d) as of the last day of each fiscal year of Borrower, achieve net income,
     before giving effect to provisions for income taxes, of at least Two
     Million Dollars ($2,000,000.00).

     For purposes of this paragraph: (i) "Tangible Net Worth" means the book
     value of Borrower's assets less liabilities (including as liabilities all
     recorded reserves for contingencies and other potential liabilities),
     excluding from such assets all Intangibles; (ii) "Intangibles" means and
     includes general intangibles (as that term is defined in the UCC); accounts
     receivable and advances due from officers, directors, member, owner,
     employees, stockholders and affiliates; leasehold improvements net of
     depreciation; licenses; good will; prepaid expenses (except for those
     determined by Agent, in its sole discretion, not to be Intangible); escrow
     deposits (except for those determined by Agent, in its sole discretion, not
     to be Intangible); covenants not to compete; the excess of cost over book
     value of acquired assets; franchise fees; organizational costs; finance
     reserves held for recourse obligations; capitalized research and
     development costs; and such other similar items as DFS may from time to
     time determine in DFS' sole discretion; (iii) "Debt" means all of
     Borrower's liabilities and indebtedness for borrowed money of any kind and
     nature whatsoever, whether direct or indirect, absolute or contingent, and
     including obligations under capitalized leases, guaranties or with respect
     to which Borrower has pledged assets to secure performance, whether or not
     direct recourse liability has been assumed by Borrower; (iv) "Subordinated
     Debt" means all of Borrower's Debt which is subordinated to the payment of
     Borrower's liabilities to the Lenders by an agreement in form and substance
     satisfactory to Agent; and (v) "Current Assets" means Borrower's current
     assets. The foregoing terms will be determined in accordance with GAAP
     consistently applied, and, if applicable, on a consolidated basis
     ("Financial Covenants")."

     7. Consent to Inventory Credit Facility Increases. Pursuant to the terms of
the Agreement for Wholesale Financing between Borrower and DFS dated June 27,
1996, as amended from time to time, DFS has agreed to make available to Borrower
an inventory credit facility of: (i) Thirty-five Million Dollars ($35,000,000)
from December 1st of each calendar year through August 31st of the following
calendar year, and (ii) Sixty Million Dollars ($60,000,000) from September 1st
through November 30th of each calendar year. In addition to the foregoing, DFS
has agreed to extend to Borrower a temporary overline in the amount of
Twenty-Five Million Dollars ($25,000,000), which temporarily increases
Borrower's inventory credit facility up to an aggregate maximum of Sixty Million
Dollars ($60,000,000) through March 31, 2002. Pursuant to the terms of that
certain Subordination Agreement dated as of July 28, 1997 among DFS, as Agent,
and the Lender Parties named therein, the prior written consent of a majority,
by number, of the Lender Parties, excluding DFS as a Lender Party, is required
to increase the maximum amount of the inventory credit facility available to
Borrower. By their signatures below, each of the Lenders does hereby consent to
each of the above-described increases in the Borrower's inventory credit
facility, and does hereby ratify and consent to any increases in the amount of
Borrower's inventory credit facility that occurred prior to the date hereof.

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<PAGE>

     8. Miscellaneous. Except to the extent specifically amended herein, all
terms and conditions of the Credit Agreement and the other Loan Documents are
hereby ratified and reaffirmed and shall remain in full force and effect.
Capitalized terms used but not defined herein shall have the meanings given them
in the Credit Agreement. Borrower waives notice of Agent's and each Lender's
acceptance of this Amendment. Agent and each Lender reserves all of their
respective rights and remedies under the Credit Agreement and other Loan
Documents.

     IN WITNESS WHEREOF, the parties hereto have executed this Sixth Amendment
as of the date first written above.

GTSI Corp.

By:
    ---------------------------------------------------

Name: Robert D. Russell
      -------------------------------------------------

Title: Senior Vice President & Chief Financial Officer
       ------------------------------------------------

DEUTSCHE FINANCIAL SERVICES CORPORATION,
as Agent and a Lender

By:
    ---------------------------------------------------

Name: Greg Ledington
      -------------------------------------------------

Title: Vice President
       ------------------------------------------------

Date:
      -------------------------------------------------

SUNTRUST BANK, N.A., a Lender

By:
    ---------------------------------------------------

Name: Mark Swaak
      -------------------------------------------------

Title: Vice President
       ------------------------------------------------

Date:
      -------------------------------------------------

FLEET CAPITAL CORPORATION, a Lender

By:
    ---------------------------------------------------

Name: Sharon Garner
      -------------------------------------------------

Title: Vice President
       ------------------------------------------------

                                       43
<PAGE>

Date:
      -------------------------------------------------

                                       44

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