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Exhibit 10.1    
  

COHERENT, INC.

     EMPLOYEE STOCK PURCHASE PLAN  

    The following constitutes the provisions of the Employee Stock Purchase Plan (herein called the "Plan") of Coherent, Inc. (herein called the "Company"). 

    1.  Purpose. The purpose of the Plan is to provide employees of the Company and its
subsidiaries with an opportunity to purchase Common Stock of the Company through payroll deductions. It is the intention of the Company to have the Plan qualify as an "Employee Stock Purchase Plan"
under Section 423 of the Internal Revenue Code of 1986. The provisions of the Plan shall, accordingly, be construed so as to extend and limit participation in a manner consistent with the
requirements of that Section of the Code. 

    2.  Definitions.  

    (a) "Base
pay" or "base salary" means regular straight-time earnings and commissions, excluding payments for overtime, shift premiums, incentive
compensation, bonuses and any other special payments. 

    (b) "Employee"
means any person, including an officer, who is customarily employed for at least twenty (20) hours per week by the Company or its subsidiaries
(50% or more of whose voting shares are owned directly or indirectly by the Company). 

    3.  Eligibility.  

    (a) Any
employee as defined in paragraph 2 who shall be employed by the Company on the date his participation in the Plan is effective shall be eligible to
participate in the Plan, subject to limitations imposed by Section 423(b) of the Internal Revenue Code of 1954. 

    (b) Any
provisions of the Plan to the contrary notwithstanding, no employee shall be granted an option under the Plan (i) if, immediately after the grant, such
employee would own shares and/or hold outstanding options to purchase stock possessing five percent (5%) or more of the total combined voting power or value of the Company, or (ii) which
permits his rights to purchase shares under all employee stock purchase plans of the Company and its subsidiaries to accrue at a rate which exceeds Twenty Five Thousand Dollars ($25,000) for each
calendar year in which such stock option is outstanding at any time, where the value of the option is calculated as the fair market value of the shares (determined at the time such option is granted). 

    4.  Offering Dates. The Plan shall be implemented by two Offerings during each fiscal year,
each of six months duration. Offering I shall commence on or about May 1 of each year and Offering II shall commence on or about November 1 of each year. Both shall continue thereafter
until terminated in accordance with paragraph 19 hereof. 

    5.  Participation.  

    (a) An
eligible employee may become a participant in the Plan by completing a subscription agreement authorizing payroll deduction on the form provided by the Company
and filing it with the Company's payroll office prior to the applicable offering date. 

    (b) Payroll
deductions for a participant shall commence on the first payroll following the commencement offering date and shall end on the termination date of the
offering to which such authorization is applicable, unless sooner terminated by the participant as provided in paragraph 10. 

    6.  Payroll Deductions.  

    (a) At
the time a participant files his subscription agreement, he shall elect to have payroll deductions made on each payday during the offering period. The amount of
payroll deductions elected to be made shall not be greater than ten percent (10%) of the base pay which he received on such payday nor less than ten dollars ($10.00) per pay period. 

    (b) All
payroll deductions made by a participant shall be credited to his account under the Plan. A participant may not make any additional payments into such account. 

    (c) A
participant may discontinue his participation in the Plan as provided in paragraph 10, or may lower, but not increase, the rate of his payroll deductions
(within the limitations set forth in subparagraph (a) above) during the offering by completing or filing with the Company a new authorization for payroll deduction. The change in rate shall be
effective within fifteen (15) days following the Company's receipt of the new authorization. 

    7.  Grant of Option.  

    (a) At
the beginning of each six month offering period, each eligible employee participating in the Plan shall be granted an option to purchase (at the per share option
price) up to a number of shares of the Company's Common Stock purchasable by each employee's accumulated payroll deductions (not to exceed ten percent (10%) of his base salary) divided by
eighty-five percent (85%) of the fair market value of a share of the Company's Common Stock at the beginning of said offering period, subject to the limitations set forth in
Section 3(b) and 12 hereof. Fair market value of a share of the Company's Common Stock shall be determined as provided in Section 7(b) herein. 

    (b) The
option price per share of such shares shall be the lower of: (I) 85% of the fair market value of a share of the Common Stock of the Company at the
commencement of the twelve month offering period; or (ii) 85% of the fair market value of a share of the Common Stock of the Company at the time the option is exercised at the termination of
the twelve month offering period. The fair market value of the Company's Common Stock on said dates shall be determined by the Company's Board of Directors in the exercise of their discretion in good
faith. 

    8.  Exercise of Option. Unless a participant withdraws from the Plan as provided in
paragraph 10, his option for the purchase of shares will be exercised automatically at the end of the offering period, and the maximum number of full shares subject to option will be purchased
for him at the applicable option price with the applicable amount of the accumulated payroll deductions in his account. During his lifetime, a participant's option to purchase shares hereunder is
exercisable only by him. 

    9.  Delivery. As promptly as practicable after the termination of each Offering, the
Company shall arrange the delivery to each participant, as appropriate, of a certificate representing the shares purchased upon exercise of his option. Any cash remaining to the credit of a
participant's account under the Plan after a purchase by him of shares at the termination of each offering period, or which is insufficient to purchase a full share of Common Stock of the Company,
shall be returned to said participant. 

    10. Withdrawal; Termination of Employment.  

    (a) A
participant may withdraw all but not less than all the payroll deductions credited to his account under the Plan for one or both Offerings at any time prior to
the end of the applicable offering period by giving written notice to the Company. All of the participant's payroll deductions credited to his account for the Offering or Offerings from which he has
withdrawn will be paid to him promptly after receipt of his notice of withdrawal and his option for the current period under the Offering or Offerings will be automatically terminated, and no further
payroll deductions for the purchase of shares under the Offering or Offerings withdrawn from will be made during the applicable offering period. 

    (b) Upon termination of the participant's employment prior to the end of an offering period for any reason, including retirement or death, the payroll deductions
credited to his account will be returned to him or, in the case of his death, to the person or persons entitled thereto under paragraph 14, and his option will be automatically terminated. 

    (c) In
the event an employee fails to remain in the continuous employ of the Company for at least twenty (20) hours per week during the offering period in which
the employee is a participant, he will be deemed to have elected to withdraw from the Plan and the payroll deductions credited to his account will be returned to him and his option terminated. 

    (d) A
participant's withdrawal from one of the two Offerings will not have any effect upon his eligibility to participate in the other Offering or any succeeding
Offering or in any similar plan which may hereafter be adopted by the Company. 

    11. Interest. To the extent that a participant's payroll deductions exceed that amount
required to purchase shares subject to option at the end of an offering period, he shall be refunded such excess amount with interest on said refundable amount at a net rate of 3%. Otherwise, no
interest shall accrue on the payroll deductions of a participant in the Plan. 

    12. Stock.  

    (a) The
maximum number of shares of the Company's Common Stock which shall be made available for sale under the Plan shall be 6,325,000 shares, subject to adjustment
upon changes in capitalization of the Company as provided in paragraph 18. The shares to be sold to participants under the Plan may, at the election of the Company, be either treasury shares or
shares authorized but unissued. If the total number of shares which would otherwise be subject to options granted pursuant to Section 7(a) hereof at the beginning of an offering period exceeds
the number of shares then available under the Plan (after deduction of all shares for which options have been exercised or are then outstanding), the Company shall make a pro rata allocation of the
shares remaining available for option grant in as uniform a manner as shall be practicable and as it shall determine to be equitable. In such event, the Company shall give written notice of such
reduction of the number of shares subject to the option to each employee affected thereby and shall similarly reduce the rate of payroll deductions, if necessary. 

    (b) The
participant will have no interest or voting right in shares covered by his option until such option has been exercised. 

    (c) Shares
to be delivered to a participant under the Plan will be registered in the name of the participant or in the name of the participant and his spouse. 

    13. Administration. The Plan shall be administered by the Board of Directors of the Company
or a committee appointed by the Board. The administration, interpretation or application of the Plan by the Board or its committee shall be final, conclusive and binding upon all participants. Members
of the Committee who are eligible employees are permitted to participate in the Plan. 

    14. Designation of Beneficiary.  

    (a) A
participant may file a written designation of a beneficiary who is to receive any shares and cash, if any, from the participant's account under the Plan in
the event of such participant's death subsequent to the end of the offering period but prior to delivery to him of such shares and cash. In addition, a participant may file a written
designation of a beneficiary who is to receive any cash from the participant's account under the Plan in the event of such participant's death prior to the end of an offering period. 

    (b) Such
designation of beneficiary may be changed by the participant at any time by written notice. In the event of the death of a participant and in the absence of a
beneficiary validly designated under the Plan who is living at the time of such participant's death, the Company shall deliver such shares and/or cash to the executor or administrator of the estate of
the participant, or 

if no such executor or administrator has been appointed (to the knowledge of the Company), the Company, in its discretion, may deliver such shares and/or cash to the spouse or to any one or more
dependents or relatives of the participant, or if no spouse, dependent or relative is know to the Company, then to such other person as the Company may designate. 

    15. Transferability.  Neither payroll deductions credited a participant's
account nor any rights with regard to the exercise of an option or to receive shares under the Plan may be assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the
laws of descent and distribution or as provided in paragraph 14 hereof) by the participant. Any such attempt at assignment, transfer, pledge or other disposition shall be without effect, except
that the Company may treat such act as an election to withdraw funds in accordance with paragraph 10. 

    16. Use of Funds. All payroll deductions received or held by the Company under the Plan may
be used by the Company for any corporate purpose, and the Company shall not be obligated to segregate such payroll deductions. 

    17. Reports. Individual accounts will be maintained for each participant in the Plan.
Statements of account will be given to participating employees annually promptly following the stock purchase date, which statements will set forth the total amount of payroll deductions, the amount
applicable to each of the two Offerings, the per share purchase price, the number of shares purchased and the remaining cash balance, if any. 

    18. Changes in Capitalization. If any option under this Plan is exercised subsequent to any
stock dividend, stock split, spin-off, recapitalization, merger, consolidation, exchange of shares or the like, occurring after such option was granted, as a result of which shares of any
class shall be issued in respect of the outstanding shares, or shares shall be changed into the same, whether a different number of the same or another class or classes, the number of shares to which
such option shall be applicable and the option price for such shares shall be appropriately adjusted by the Company. 

    19. Amendment or Termination. The Board of Directors of the Company may at any time
terminate or amend the Plan. No such termination can affect options previously granted, nor may an amendment make any change in any option theretofore granted which adversely affects the rights of any
participant, nor may an amendment be made without prior approval of the shareholders of the Company if such amendment would: 

    (a) Increase
the number of shares that may be issued under the plan; 

    (b) Permit
payroll deductions at an aggregate rate in excess of ten percent (10%) of the participant's base salary; 

    (c) Change
the designation of the employees (or class of employees) eligible for participation in the Plan; or 

    (d) Materially
increase the benefits which may accrue to participants under the Plan. 

    20. Notices. All notices or other communications by a participant to the Company under or
in connection with the Plan shall be deemed to have been duly given when received in the form specified by the Company at the location or by the person, designated by the Company for the receipt
thereof. 

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Exhibit 10.1<Page>

================================================================================

EXHIBIT 10.42

                                   MCSI, INC.
                                 AS THE BORROWER

                                       AND

                     THE FINANCIAL INSTITUTIONS NAMED HEREIN
                                   AS LENDERS

                               NATIONAL CITY BANK
                     AS A LENDER AND AS DOCUMENTATION AGENT

                         PNC BANK, NATIONAL ASSOCIATION
                       AS A LENDER, THE SWING LINE LENDER
                            A LETTER OF CREDIT ISSUER
                           AND AS ADMINISTRATIVE AGENT

                              ---------------------

                                AMENDMENT NO. 12
                                   DATED AS OF
                                 MARCH 30, 2001
                                       TO
                      AMENDED AND RESTATED CREDIT AGREEMENT
                                   DATED AS OF
                                DECEMBER 1, 1998

                              ---------------------

================================================================================

<Page>

                                AMENDMENT NO. 12
                                       TO
                      AMENDED AND RESTATED CREDIT AGREEMENT

         THIS AMENDMENT NO. 12 TO AMENDED AND RESTATED CREDIT AGREEMENT,
dated as of March 30, 2001 ("THIS AMENDMENT ") by and among:

                  (i)      MCSI, INC., a Maryland corporation which is the
         successor by merger to Miami Computer Supply Corporation, an Ohio
         corporation (herein, together with its successors and assigns, the
         "BORROWER");

                  (ii)     the financial institutions listed on the signature
         pages hereof (the "LENDERS");

                  (iii)    NATIONAL CITY BANK, a national banking association,
         as a Lender and as Documentation Agent; and

                  (iv)     PNC BANK, NATIONAL ASSOCIATION, a national banking
         association, as a Lender, the Swing Line Lender, a Letter of Credit
         Issuer and as Administrative Agent (the "ADMINISTRATIVE AGENT") for the
         Lenders under the Credit Agreement:

         PRELIMINARY STATEMENTS:

         (1)      The Borrower, the Lenders named therein, and the
Administrative Agent entered into the Amended and Restated Credit Agreement,
dated as of December 1, 1998, as amended by Amendment No. 1 thereto, dated as of
March 31, 1999, Amendment No. 2 thereto, dated as of April 19, 1999, Amendment
No. 3 thereto, dated as of August 13, 1999, Amendment No. 4 thereto, dated as of
August 31, 1999, Amendment No. 5 thereto, dated as of December 20, 1999,
Amendment No. 6 thereto, dated as of January 10, 2000, Amendment No. 7 thereto,
dated as of February 4, 2000, Amendment No. 8 thereto, dated as of April 30,
2000, Amendment No. 9 thereto, dated May 31, 2000, Amendment No. 10 thereto,
dated as of September 27, 2000 and Amendment No. 11 thereto, dated as of
December 8, 2000 (as so amended, the "CREDIT AGREEMENT"; with the terms defined
therein, or the definitions of which are incorporated therein, being used herein
as so defined).

         (2)      Pursuant to Amendment No. 11 to Amended and Restated Credit
Agreement, dated as of December 8, 2000 ("AMENDMENT NO. 11"), the Credit
Agreement was amended to provide, among other things, for a temporary increase
in the Total General Revolving Commitment from $160,000,000 to $181,000,000, and
the Lenders made General Revolving Loans to the Borrower reflecting usage of
such temporary increase (such General Revolving Credit Loans reflecting such
usage are referred to herein as the "DECEMBER BRIDGE LOANS").

         (3)      The parties hereto desire to amend the Credit Agreement to
extend the due date of the December Bridge Loans from March 31, 2001 to June 30,
2001, to amend certain financial covenants, and to otherwise amend certain
provisions of the Credit Agreement, all as more fully set forth below.

         NOW, THEREFORE, the parties hereby agree as follows:

         1.       AMENDMENTS, ETC.

<Page>

         1.1.     EXTENSION OF TEMPORARY INCREASE IN TOTAL GENERAL REVOLVING
COMMITMENT, ETC. Effective on and as of the Amendment Effective Date (as defined
below), the Temporary Increase End Date (as such term is defined in Amendment
No. 11) is hereby amended such that with respect to the December Bridge Loans
the Temporary Increase End Date shall mean the earlier of (i) June 30, 2001, or
(ii) the date the Total General Revolving Credit Commitment is terminated.
Notwithstanding anything in Amendment No. 11 to the contrary, effective on the
Amendment Effective Date, with respect to all December Bridge Loans, the
Applicable Temporary Margin ( as defined in Amendment No. 11) shall be 350.00
basis points with respect to December Bridge Loans that are Eurodollar Loans and
200 basis points with respect to December Bridge Loans that are Prime Rate
Loans. Except as modified pursuant to this section, all other terms and
conditions of the December Bridge Loans shall remain in full force and effect.

         1.2.     PRICING. Effective on and as of the Amendment Effective Date,
the Pricing Grid Table that in section 2.7(h) of the Credit Agreement is amended
to read in its entirety as follows:

                               PRICING GRID TABLE
                           (EXPRESSED IN BASIS POINTS)
<Table>
<Caption>
-----------------------------------------------------------------------------------------------------------
        RATIO OF                               APPLICABLE                APPLICABLE         APPLICABLE
        CONSOLIDATED TOTAL DEBT                EURODOLLAR MARGIN         PRIME RATE         COMMITMENT
        TO                                     FOR GENERAL               MARGIN             FEE RATE
TIER    CONSOLIDATED EBITDA                    REVOLVING LOANS

-----------------------------------------------------------------------------------------------------------
<S>     <C>                                    <C>                       <C>                <C>
  VI    Greater than 3.50 to 1.00              300.00                    150.00              50.00

-----------------------------------------------------------------------------------------------------------

   V    Greater than 3.00 to 1.00 but less     275.00                    125.00              50.00
        than or equal to 3.50 to 1.00
-----------------------------------------------------------------------------------------------------------

  IV    Greater than 2.50 to 1.00 but less     250.00                    100.00              50.00
        than or equal to 3.00 to 1.00
-----------------------------------------------------------------------------------------------------------

  III   Greater than 2.00 to 1.00 but less     225.00                    75.00               50.00
        than or equal to 2.50 to 1.00
-----------------------------------------------------------------------------------------------------------

  II    Greater than 1.50 to 1.00 but less     200.00                    50.00               35.00
        or equal to 2.00 to 1.00
-----------------------------------------------------------------------------------------------------------

   I    Less than or equal to 1.50 to 1.00     175.00                    25.00               25.00
-----------------------------------------------------------------------------------------------------------
</Table>

         1.3.     EFFECTIVENESS OF PRICING CHANGES. Commencing on the Amendment
Effective Date, for all General Revolving Loans (other than General Revolving
Loans that are December Bridge Loans) then or thereafter outstanding, and until
changed in accordance with the applicable provisions of section 2.7(h) of the
Credit Agreement, based on the consolidated financial statements of the Borrower
for a fiscal quarter ended on or nearest to March 31, 2001 or thereafter, the
Applicable Eurodollar Margin for General Revolving Loans shall be 300 basis
points and the Applicable Prime Rate Margin for General Revolving Loans will be
150 basis points.

         1.4.     CONSOLIDATED TOTAL DEBT/CONSOLIDATED EBITDA RATIO. Effective
on and as of the Amendment Effective Date, Section 9.7 of the Credit Agreement
is amended to read in its entirety as follows:

                  9.7.     CONSOLIDATED TOTAL DEBT/CONSOLIDATED EBITDA RATIO.
         The Borrower will not at any time permit the ratio of (a) the amount of
         Consolidated Total Debt at such time to (b) Consolidated EBITDA for the
         Testing Period most recently ended, to exceed (i) 4.30 to 1.00 in the
         case of any Testing Period ended on or prior to June 29, 2000, (ii)
         4.00 to 1.00, in the case of the Testing Periods ended June

<Page>

         30, 2000 and September 30, 2000, (iii) 3.75 to 1.00, in the case of the
         Testing Periods ended December 31, 2000 and March 31, 2001, (iv) 3.60
         to 1.00, in the case of the Testing Period ended June 30, 2001, (v)
         3.25 to 1.00 in the case of any Testing Period ended September 30, 2001
         and December 31, 2001, and (vi) 3.00 to 1.00, in the case of any
         Testing Period ended thereafter.

         1.5.     FIXED CHARGE COVERAGE RATIO. Effective on and as of the
Amendment Effective Date, Section 9.8 of the Credit Agreement is amended to read
in its entirety as follows:

                  9.8.     FIXED CHARGE COVERAGE RATIO. The Borrower will not
         permit its Fixed Charge Coverage Ratio to be less than (a) 1.20 to 1.00
         for any Testing Period ended on or prior to June 30, 2000, (b) 1.25 to
         1.00, for the Testing Period ended September 30, 2000 through the
         Testing Period ended December 31, 2001, and (c) 1.40 to 1.00 in the
         case of any Testing Period ended thereafter. Notwithstanding the
         foregoing, for the Testing Periods ended December 31, 2000, March 31,
         2001 and June 30, 2001, the December Bridge Loans (as defined in
         Amendment No. 11 to Amended and Restated Credit Agreement, dated as of
         March __, 2001) shall be excluded from clause (ii)(E) of the definition
         of Fixed Charge Coverage Ratio for the purpose of determining
         compliance with this Section 9.8.

         1.6.     CONSOLIDATED CAPITAL EXPENDITURES. Effective on the Amendment
Effective Date, Section 9.9 of the Credit Agreement is amended, retroactively
effective to December 31, 2000, to read in its entirety as follows:

                  9.9.     CAPITAL EXPENDITURES. The Borrower will not, and will
         not permit any of its Subsidiaries to, make or incur Consolidated
         Capital Expenditures during any fiscal year (a) in excess of
         $10,500,000, in the case of the fiscal year ended December 31, 1999,
         (b) in excess of $11,500,000, in the case of the fiscal year ended
         December 31, 2000, or (iii) in excess of $5,000,000, in the case of any
         subsequent fiscal year. In the event actual Consolidated Capital
         Expenditures for any fiscal year are less than such amount, the excess
         amount may not be carried over to any subsequent period.

         1.7.     AMENDMENT FEE. As consideration for the amendments to the
Credit Agreement pursuant to this Amendment, the Borrower will pay to the
Administrative Agent, (i) for the PRO RATA distribution among those Lenders
signatory hereto an amendment fee at the rate of 25.00 basis points, calculated
on the $160,000,000 General Revolving Loan Commitment, and (ii) for the PRO RATA
distribution among the Lenders that have extended the due date of the December
Bridge Loans, an amendment fee of 200.00 basis points calculated on such
Lender's Commitment with respect to such December Bridge Loans. The foregoing
fees shall be payable in immediately available funds on the Amendment Effective
Date.

         20       REPRESENTATIONS AND WARRANTIES.

         The Borrower represents and warrants to the Lenders and the
Administrative Agent as follows:

         2.1.     AUTHORIZATION, VALIDITY AND BINDING EFFECT. This Amendment has
been duly authorized by all necessary corporate action on the part of the
Borrower, has been duly executed and delivered by a duly authorized officer or
officers of the Borrower, and constitutes the valid and binding agreement of the
Borrower, enforceable against the Borrower in accordance with its terms.

         2.2.     REPRESENTATIONS AND WARRANTIES TRUE AND CORRECT. The
representations and warranties of the Borrower contained in the Credit
Agreement, as amended hereby, are true and correct on and as of the date hereof
as though made on and as of the date hereof, except to the extent that such
representations and warranties expressly relate to a specified date, in which
case such representations and warranties are hereby reaffirmed as true and
correct when made.

         2.3.     NO EVENT OF DEFAULT, ETC. No condition or event has occurred
or exists which constitutes or which, after notice or lapse of time or both,
would constitute an Event of Default.

         2.4.     COMPLIANCE. The Borrower is in full compliance with all
covenants and agreements contained in the Credit Agreement, as amended hereby.

<Page>

         2.5.     RECENT FINANCIAL STATEMENTS. The Borrower has furnished to the
Lenders and the Administrative Agent complete and correct copies of the
unaudited condensed consolidated balance sheet of the Borrower and its
consolidated subsidiaries as of December 31, 2000, and the related unaudited
condensed consolidated statements of income and of cash flows of the Borrower
and its consolidated subsidiaries for the fiscal period then ended, as contained
in the Form 10-Q Quarterly Report of the Borrower filed with the SEC. All such
financial statements have been prepared in accordance with GAAP, consistently
applied (except as stated therein), and fairly present the financial position of
the Borrower and its consolidated subsidiaries as of the date indicated and the
consolidated results of their operations and cash flows for the period
indicated, subject to normal audit adjustments, none of which will involve a
Material Adverse Effect.

         30       EFFECTIVENESS.

         This Amendment shall become effective on March 30, 2001 (the "AMENDMENT
EFFECTIVE DATE"), subject to the satisfaction of the following conditions on or
before such date:

                  (a)      this Amendment shall have been executed by the
         Borrower and the Administrative Agent, and counterparts hereof as so
         executed shall have been delivered to the Administrative Agent;

                  (b)      the Acknowledgment and Consent appended hereto shall
         have been executed by the Credit Parties named therein, and
         counterparts hereof as so executed shall have been delivered to the
         Administrative Agent;

                  (c)      the Administrative Agent shall have been notified by
         all of the Required Lenders (and to the extent required by the Credit
         Agreement, all of the Lenders affected thereby) that such Lenders have
         executed this Amendment (which notification may be by facsimile or
         other written confirmation of such execution);

                  (d)      the Borrower shall have duly executed and delivered
         to the Administrative Agent, for the account of the Lenders, additional
         General Revolving Notes made payable to the order of the respective
         Lenders in the amount of the temporary increase in their respective
         General Revolving Commitments provided for in this Amendment, and
         otherwise conforming to the requirements of the Credit Agreement;

                  (e)      the Borrower shall have delivered to the
         Administrative Agent a certificate of its Secretary or an Assistant
         Secretary, dated as of a recent date, certifying the due adoption by
         the Board of Directors of resolutions approving the extension of the
         due date for the December Bridge Loans and the other modifications to
         the Credit Agreement set forth in this Amendment, and certifying that
         such resolutions remain in full force and effect, and such certificate
         and resolution shall be satisfactory in form and substance to the
         Administrative Agent;

                  (f)      the Borrower shall have delivered a certificate of
         the Borrower's chief executive officer or chief financial officer
         certifying to the Administrative Agent and the Lenders that as of the
         Amendment Effective Date (i) the representations and warranties of the
         Borrower contained in the Credit Agreement, as amended hereby, are true
         and correct on and as of the Amendment Effective Date as though made on
         and as of the Amendment Effective Date, except to the extent that such
         representations and warranties expressly relate to a specified date, in
         which case such representations and warranties are hereby reaffirmed as
         true and correct when made; (ii) no condition or event has occurred or
         exists which constitutes or which, after notice or lapse of time or
         both, would constitute an Event of Default; and (iii) the Borrower is
         in full compliance with all covenants and agreements contained in the
         Credit Agreement, as amended hereby; and

                  (g)      the Borrower shall have paid to the Administrative
         Agent, for the account of the Lenders, such amendment fees as are
         payable at such time as provided in section 1.7 of this Amendment (the
         Administrative Agent hereby agreeing to promptly re-transmit pro rata
         portions of the amendment fees to the respective Lenders signatory
         hereto).

Subject to satisfaction of the foregoing conditions, the Administrative Agent
shall notify the Borrower and each Lender in writing of the effectiveness
hereof.

<Page>

         40       RATIFICATIONS.

         The terms and provisions set forth in this Amendment shall modify and
supersede all inconsistent terms and provisions set forth in the Credit
Agreement, and except as expressly modified and superseded by this Amendment,
the terms and provisions of the Credit Agreement are ratified and confirmed and
shall continue in full force and effect.

         50       MISCELLANEOUS.

         5.1.     SUCCESSORS AND ASSIGNS. This Amendment shall be binding upon
and inure to the benefit of the Borrower, each Lender and the Administrative
Agent and their respective permitted successors and assigns.

         5.2.     SURVIVAL OF REPRESENTATIONS AND WARRANTIES. All
representations and warranties made in this Amendment shall survive the
execution and delivery of this Amendment, and no investigation by the
Administrative Agent or any Lender or any subsequent Loan or issuance of a
Letter of Credit shall affect the representations and warranties or the right of
the Administrative Agent or any Lender to rely upon them.

         5.3.     REFERENCE TO CREDIT AGREEMENT. The Credit Agreement and any
and all other agreements, instruments or documentation now or hereafter executed
and delivered pursuant to the terms of the Credit Agreement as amended hereby,
are hereby amended so that any reference therein to the Credit Agreement shall
mean a reference to the Credit Agreement as amended hereby.

         5.4.     EXPENSES. As provided in the Credit Agreement, but without
limiting any terms or provisions thereof, the Borrower agrees to pay on demand
all costs and expenses incurred by the Administrative Agent in connection with
the preparation, negotiation, and execution of this Amendment, including without
limitation the costs and fees of the Administrative Agent's special legal
counsel, regardless of whether this Amendment becomes effective in accordance
with the terms hereof, and all costs and expenses incurred by the Administrative
Agent or any Lender in connection with the enforcement or preservation of any
rights under the Credit Agreement, as amended hereby.

         5.5.     SEVERABILITY. Any term or provision of this Amendment held by
a court of competent jurisdiction to be invalid or unenforceable shall not
impair or invalidate the remainder of this Amendment and the effect thereof
shall be confined to the term or provision so held to be invalid or
unenforceable.

         5.6.     APPLICABLE LAW. This Amendment shall be governed by and
construed in accordance with the laws of the State of Ohio.

         5.7.     HEADINGS. The headings, captions and arrangements used in this
Amendment are for convenience only and shall not affect the interpretation of
this Amendment.

         5.8.     ENTIRE AGREEMENT. This Amendment is specifically limited to
the matters expressly set forth herein. This Amendment and all other
instruments, agreements and documentation executed and delivered in connection
with this Amendment embody the final, entire agreement among the parties hereto
with respect to the subject matter hereof and supersede any and all prior
commitments, agreements, representations and understandings, whether written or
oral, relating to the matters covered by this Amendment, and may not be
contradicted or varied by evidence of prior, contemporaneous or subsequent oral
agreements or discussions of the parties hereto. There are no oral agreements
among the parties hereto relating to the subject matter hereof or any other
subject matter relating to the Credit Agreement.

         5.9.     COUNTERPARTS. This Amendment may be executed by the parties
hereto separately in one or more counterparts, each of which when so executed
shall be deemed to be an original, but all of which when taken together shall
constitute one and the same agreement.

<Page>

         IN WITNESS WHEREOF, this Amendment has been duly executed and delivered
as of the date first above written.

<Table>

--------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
MCSi, INC.,                                                 PNC BANK, NATIONAL ASSOCIATION,
     A MARYLAND CORPORATION WHICH IS THE                          INDIVIDUALLY AS A LENDER, A LETTER OF CREDIT
     SUCCESSOR BY MERGER TO MIAMI COMPUTER                        ISSUER, THE SWING LINE LENDER AND AS
     SUPPLY CORPORATION, AN OHIO CORPORATION                      ADMINISTRATIVE AGENT

                                                            BY:_________________________________
BY:_________________________________                                   VICE PRESIDENT
           TITLE:

--------------------------------------------------------------------------------------------------------------------

NATIONAL CITY BANK,                                         FIRSTAR BANK, N. A.
     INDIVIDUALLY AS A LENDER AND
     AS DOCUMENTATION AGENT

                                                            BY:_________________________________
BY:_________________________________                                   TITLE:
           TITLE:

--------------------------------------------------------------------------------------------------------------------

KEY CORPORATE CAPITAL INC.                                  THE HUNTINGTON NATIONAL BANK

BY:_________________________________                        BY:_________________________________
           TITLE:                                                      TITLE:
--------------------------------------------------------------------------------------------------------------------

BANK ONE, INDIANA, N. A.                                    THE PROVIDENT BANK

BY:_________________________________                        BY:_________________________________
           TITLE:                                                      TITLE:
--------------------------------------------------------------------------------------------------------------------

</Table>

<Page>

                           ACKNOWLEDGMENT AND CONSENT

         For the avoidance of doubt, and without limitation of the intent and
effect of sections 6 and 10 of the Amended and Restated Subsidiary Guaranty (as
such term is defined in the Credit Agreement referred to in the Amendment No. 12
to Amended and Restated Credit Agreement (the "AMENDMENT"), to which this
Acknowledgment and Consent is appended), each of the undersigned hereby
unconditionally and irrevocably (i) acknowledges receipt of a copy of the Credit
Agreement and the Amendment, and (ii) consents to all of the terms and
provisions of the Credit Agreement as amended by the Amendment.

         Capitalized terms which are used herein without definition shall have
the respective meanings ascribed thereto in the Credit Agreement referred to
herein. This Acknowledgment and Consent is for the benefit of the Lenders and
the Administrative Agent, any other person who is a third party beneficiary of
the Subsidiary Guaranty, and their respective successors and assigns. No term or
provision of this Acknowledgment and Consent may be modified or otherwise
changed without the prior written consent of the Administrative Agent, given as
provided in the Credit Agreement. This Acknowledgment and Consent shall be
binding upon the successors and assigns of each of the undersigned. This
Acknowledgment and Consent may be executed by any of the undersigned in separate
counterparts, each of which shall be an original and all of which together shall
constitute one and the same instrument.

         IN WITNESS WHEREOF, each of the undersigned has duly executed and
delivered this Acknowledgment and Consent as of the date of the Amendment
referred to herein.

-------------------------------------------------------------------------------

Diversified Data Products, Inc.                Electronic Image Systems, Inc.
Computer Showcase, Inc.                        Consolidated Media Systems, Inc.
Jack Kelly & Associates, Inc.                  Technical Industries, Inc.
Dreher Business Products Corporation           C&G Marketing, Inc.
Central Audio Video, Inc.                      Fairview-AFX, Inc.
Audio-Visual Systems, Inc.                     Video Images, Inc.
Midwest Visual Equipment Co., Inc.
Westek Presentation Systems, Inc.
                                               By:_____________________________
                                                      Ira Stanley, an officer
By:_____________________________
        Michael E. Peppel, an officer
-------------------------------------------------------------------------------

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