CDW COMPUTER CENTERS INC
10-Q, 1997-08-15
CATALOG & MAIL-ORDER HOUSES
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<PAGE>   1



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-Q
      (Mark One)

 X    QUARTERLY  REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES  
- ---   EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 1997 OR

      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
- ---   EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM _____________ 
      TO _____________

COMMISSION FILE NUMBER      0-21796

                           CDW COMPUTER CENTERS, INC.
             (Exact name of registrant as specified in its charter)

                 Illinois                              36-3310735
      (State or other jurisdiction of               (I.R.S. Employer
      incorporation or organization)               Identification No.)

           200 N. Milwaukee Ave.                         60061
          Vernon Hills, Illinois                       (Zip Code)
  (Address of principal executive offices)

                                 (847) 465-6000
              (Registrant's telephone number, including area code)

                  1020 E. LAKE COOK RD. BUFFALO GROVE, IL 60089
                  ---------------------------------------------
 (Former name, former address and former fiscal year, if changed since last 
                                    report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

YES      X                                       NO 
    ----------------                                ----------------

APPLICABLE  ONLY TO  ISSUERS  INVOLVED  IN  BANKRUPTCY  PROCEEDINGS  DURING  THE
PRECEDING FIVE YEARS:

Indicate  by check mark  whether  the  registrant  has filed all  documents  and
reports  required  to be filed by  Sections  12,  13 or 15(d) of the  Securities
Exchange Act of 1934 subsequent to the  distribution of securities  under a plan
confirmed by a court.

YES                                              NO
    ----------------                                ----------------  

APPLICABLE ONLY TO CORPORATE ISSUERS:
Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest practicable date.

         AS OF AUGUST 14, 1997, 21,524,984 COMMON SHARES WERE OUTSTANDING.


<PAGE>  2



                           CDW COMPUTER CENTERS, INC.

                                TABLE OF CONTENTS

                                                                      Page No.
                                                                      --------

PART I.  FINANCIAL INFORMATION

         ITEM 1.   Financial Statements (unaudited):

                   Condensed Consolidated Balance Sheets -               1
                   June 30, 1997 and December 31, 1996

                   Condensed Consolidated Statements of Income -         2
                   Three and Six Months Ended June 30, 1997 and 1996

                   Condensed Consolidated Statement of                   3
                   Shareholders' Equity - Six Months Ended 
                   June 30, 1997                                         

                   Condensed Consolidated Statements of Cash Flows -     4
                   Six Months Ended June 30, 1997 and 1996

                   Notes to Condensed Consolidated Financial            5-7
                   Statements                                           


         ITEM 2.   Management's Discussion and Analysis of              8-14
                   Financial Condition and Results of Operations        


PART II. OTHER INFORMATION

         Item 1.   Legal Proceedings                                     15
         Item 4.   Submission of Matters to a Vote of Security           16
                   Holders                                               
         Item 6.   Exhibits and Reports on Form 8-K                      17

                   Signatures                                            18


                                       ii
<PAGE>  3
PART I. FINANCIAL INFORMATION
ITEM I. FINANCIAL STATEMENTS

                    CDW COMPUTER CENTERS, INC. AND SUBSIDIARY
                      CONDENSED CONSOLIDATED BALANCE SHEET
                                 (in thousands)
                                   (unaudited)

<TABLE>
<CAPTION>

                                                                 June 30,           December 31,
                                                                  1997                 1996
                                                                ---------           ------------
ASSETS
<S>                                                             <C>                  <C>
Current assets :
     Cash and cash equivalents                                  $  11,354            $  16,462
     Marketable securities                                         69,001               58,490
     Accounts receivable, net of allowance for doubtful
       accounts of $1,500 and $1,100, respectively                 65,917               57,396
     Miscellaneous receivables                                      1,989                3,931
     Merchandise inventory                                         47,012               41,462
     Prepaid expenses and other assets                              1,081                  823
     Deferred income taxes                                          2,374                2,258
                                                                ---------            ---------

        Total current assets                                      198,728              180,822

Property and equipment, net                                         3,082                3,636
Construction-in-progress                                           17,483                8,659
Deferred income taxes and other assets                              5,411                5,713
                                                                ---------            ---------

         Total assets                                           $ 224,704            $ 198,830
                                                                =========            =========

LIABILITIES AND SHAREHOLDERS' EQUITY

Current liabilities :
     Accounts payable                                           $  28,228            $  36,642
     Accrued expenses :
        Compensation                                                9,568               10,750
        Income taxes                                                7,664                2,892
        Exit costs                                                  3,931                3,987
        Other                                                       3,511                2,937
                                                                ---------            ---------

         Total current liabilities                                 52,902               57,208
                                                                ---------            ---------

Commitments and contingencies

Shareholders' equity :

     Preferred shares, $1.00 par value; 5,000 shares
        authorized; none issued                                         -                    -
     Common shares, $ .01 par value; 75,000 shares
        authorized; 21,525 shares issued and
        outstanding                                                   215                  215
     Paid-in capital                                               73,794               67,953
     Retained earnings                                             99,476               75,417
     Unearned compensation                                         (1,683)              (1,963)
                                                                ---------            ---------
        Total shareholders' equity                                171,802              141,622
                                                                ---------            ---------

         Total liabilities and shareholders' equity             $ 224,704            $ 198,830
                                                                =========            =========
</TABLE>

     The accompanying notes are an integral part of the consolidated financial
     statements

                                       1

<PAGE>  4
                    CDW COMPUTER CENTERS, INC. AND SUBSIDIARY
                   CONDENSED CONSOLIDATED STATEMENT OF INCOME
                      (in thousands, except per share data)
                                   (unaudited)

<TABLE>
<CAPTION>

                                                      Three Months                          Six Months
                                                   Ended June 30, 1997                  Ended June 30, 1997
                                                  ---------------------                ---------------------
                                                                                                             
                                                     1997        1996                     1997        1996
                                                  ---------   ---------                ---------   ---------

                        
<S>                                               <C>         <C>                      <C>         <C>      
 Net sales                                        $ 304,545   $ 218,687                $ 602,322   $ 425,392
 Cost of sales                                      262,888     189,071                  520,722     369,129
                                                  ---------   ---------                ---------   ---------

 Gross profit                                        41,657      29,616                   81,600      56,263

 Selling and administrative expenses                 21,586      16,555                   43,613      30,911
 Exit charge                                              -           -                        -       4,000
                                                  ---------   ---------                ---------   ---------

 Income from  operations                             20,071      13,061                   37,987      21,352

 Interest income                                      1,032         842                    1,989       1,677
 Other income (expense), net                            (60)        (44)                    (111)        (98)
                                                  ---------   ---------                 ---------   ---------

 Income before income taxes                          21,043      13,859                    39,865      22,931

 Income tax provision                                 8,343       5,365                    15,806       8,903
                                                  ---------   ---------                 ---------   ---------

 Net income                                       $  12,700   $   8,494                 $  24,059   $  14,028
                                                  =========   =========                 =========   =========

 Net income per share                             $    0.59   $    0.39                 $    1.11   $    0.65
                                                  =========   =========                 =========   =========

 Weighted average number of
 common and common equivalent
 shares outstanding                                  21,673      21,810                    21,677      21,729
                                                  =========   =========                 =========   =========
</TABLE>

     The accompanying notes are an integral part of the consolidated financial
     statements

                                       2

<PAGE>  5
                    CDW COMPUTER CENTERS, INC. AND SUBSIDIARY
            CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY
                                 (in thousands)
                                   (unaudited)

<TABLE>
<CAPTION>

                                                                                                                        Total
                                               Common Stock                            Retained        Unearned      Shareholders'
                                             Shares     Amount     Paid-in Capital      Earnings      Compensation       Equity
                                             --------------------------------------------------------------------------------------
<S>                                          <C>        <C>         <C>                <C>               <C>             <C>    
Balance at December 31, 1996                 21,525     $ 215       $  67,953          $  75,417       $  (1,963)     $  141,622

MPK Restricted Stock Plan forfeitures             -         -             (45)                 -              23             (22)

Amortization of unearned compensation             -         -               -                  -             257             257

Tax benefit from restricted stock and             -         -           5,835                  -               -           5,835
     stock option transactions

Capital contribution for legal costs assumed      -         -              51                  -               -              51
     by majority shareholder                                          

Net income                                        -         -               -             24,059               -          24,059
                                             --------------------------------------------------------------------------------------

Balance at June 30, 1997                     21,525     $ 215       $  73,794          $  99,476       $  (1,683)     $  171,802
                                             ======================================================================================
</TABLE>


    The accompanying notes are an integral part of the consolidated financial
    statements

                                       3

<PAGE>  6
                    CDW COMPUTER CENTERS, INC. AND SUBSIDIARY
                 CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)

<TABLE>
<CAPTION>

                                                                               Six Months Ended June 30,
                                                                               -------------------------
                                                                                 1997            1996
                                                                               --------        --------
<S>                                                                            <C>             <C>
Cash flows from operating activities:

Net income                                                                     $ 24,059        $ 14,028

Adjustments to  reconcile  net  income  to  net  cash  provided  by 
operating activities:

        Tax benefit from restricted stock and stock option exercise               5,835               -
        Depreciation and amortization                                               636           1,316
        Deferred taxes                                                              190            (373)
        Legal fees assumed by majority shareholder                                   51              33
        Loss on disposal of fixed asset                                               -             281

        Changes in assets and liabilities:
            Accounts receivable, net                                             (8,521)        (11,560)
            Miscellaneous receivables                                             1,942            (156)
            Merchandise inventory                                                (5,550)        (10,493)
            Prepaid expenses and other assets                                      (262)           (782)
            Accounts payable                                                     (8,414)          6,452
            Accrued expenses                                                      4,164           2,272
            Exit charge                                                             (56)          4,000
                                                                               --------        --------

        Net cash provided by operating activities                                14,074           5,018
                                                                               --------        --------

Cash flows from investing activities:

        Purchases of available-for-sale securities                              (12,575)        (10,600)
        Redemptions of available-for-sale securities                              7,575          16,100
        Purchases of held-to-maturity securities                                (42,058)        (51,154)
        Redemptions of held-to-maturity securities                               37,153          36,558
        Payments for purchase of property and equipment,
            including construction-in-progress                                   (9,277)         (7,082)
                                                                               --------        --------

        Net cash used in investing activities                                   (19,182)        (16,178)
                                                                               --------        --------

Net decrease in cash                                                             (5,108)        (11,160)

Cash and cash equivalents - beginning of period                                  16,462          14,216
                                                                               --------        --------

Cash and cash equivalents - end of period                                      $ 11,354        $  3,056
                                                                               ========        ========
</TABLE>

     The accompanying notes are an integral part of the consolidated financial
     statements

                                       4

<PAGE>  7





                    CDW COMPUTER CENTERS, INC. AND SUBSIDIARY
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (unaudited)

1.  Description of Business

     CDW Computer  Centers,  Inc. (the "Company") is engaged in the distribution
of personal  computers and related  products through direct marketing and retail
showrooms,  primarily to end users within the United States. The Company extends
credit to business,  governmental  and  institutional  customers  under  certain
circumstances based upon the financial strength of the customer.  Such customers
are  typically  granted net 30-day  credit  terms.  The balance of the Company's
sales  are made  primarily  through  third  party  credit  cards and for cash on
delivery.

2.  Summary of Significant Accounting Policies

Basis of Presentation

     The  accompanying  unaudited  financial  statements  have been  prepared in
conformity with generally accepted accounting  principles.  Such principles were
applied on a basis  consistent with those reflected in the 1996 Annual Report on
Form 10-K and documents  incorporated  therein as filed with the  Securities and
Exchange  Commission.   The  accompanying  financial  data  should  be  read  in
conjunction with the notes to consolidated financial statements contained in the
1996  Annual  Report on Form 10-K and  documents  incorporated  therein.  In the
opinion  of  management,   the  accompanying  unaudited  condensed  consolidated
financial  statements  contain  all  adjustments  (consisting  solely  of normal
recurring  accruals)  necessary to present fairly the financial  position of the
Company as of June 30, 1997 and December 31, 1996, the results of operations for
the three and six months  ended June 30,  1997 and 1996,  the cash flows for the
six months ended June 30, 1997 and 1996, and the changes in shareholders' equity
for the six months ended June 30, 1997.  The  unaudited  condensed  consolidated
statements of income for such interim periods are not necessarily  indicative of
results for the full year.

     The  Company  is  currently  assessing  the impact of the  recently  issued
Statements of Financial  Accounting  Standards  numbers 130 and 131,  "Reporting
Comprehensive  Income" and  "Disclosures  about  Segments of an  Enterprise  and
Related Information". The Company will implement the requirements of each of the
Statements at the end of 1997.

Pervasiveness of Estimates

     The  preparation  of financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements.  Additionally,  such estimates and  assumptions  affect the reported
amounts of revenues and expenses  during the reporting  period.  Actual  results
could differ from those estimates.

Earnings Per Share

     Net income per  common  and common  equivalent  share for the three and six
months ended June 30, 1997 and 1996 is  calculated  using the  weighted  average
number of common and common  equivalent shares  outstanding  during each period.
Common  equivalent  shares of 148,000  and  152,000 for the three and six months
ended June 30, 1997,  and 285,000 and 203,000 for the three and six months ended
June 30, 1996, respectively,  relate to various incentive stock option plans and
are calculated using the treasury stock method.

     In  accordance  with  Statement of Financial  Accounting  Standard No. 128,
"Earnings Per Share" (SFAS 128), the Company will implement the  requirements of
SFAS 128 at the end of 1997. The Company has calculated earnings per share using
both the basic and diluted  methods,  which  amounts will not differ  materially
from earnings per share as currently reported.

                                       5

<PAGE>  8

     On June 24,  1996,  the  Board of  Directors  of the  Company  announced  a
three-for-two  stock split effected in the form of a stock dividend paid on July
15, 1996 to all common  shareholders of record as of July 5, 1996. All per share
and related amounts contained in these financial  statements and notes have been
adjusted to reflect the stock split.

3.  Marketable Securities

The amortized  cost and estimated  fair values of the Company's  investments
in marketable  securities at June 30, 1997 were (in thousands):

<TABLE>
<CAPTION>
                                                                                            Gross
                                                                                          Unrealized
                                                                                            Holding
                                                                 Estimated                  -------                  Amortized
                                                                 Fair Value         Gains           (Losses)            Cost
                                                                ------------     ------------     ------------    --------------
<S>                                                             <C>              <C>              <C>              <C>
Security Type
- -------------                                                                                                    
Available-for-sale:
  Redemptive tax-exempt preferred stocks                        $      8,000     $        -        $        -       $      8,000
                                                                ----------------------------------------------------------------
Held to maturity:
  U.S. Government and U.S. Government Agency Securities               53,961              -               (45)            54,006
  Bonds of states, municipalities, and political subdivisions          7,008             13                 -              6,995  
                                                                ----------------------------------------------------------------
  Total held-to-maturity                                              60,969             13               (45)            61,001
                                                                ----------------------------------------------------------------
Total marketable securities                                     $     68,969     $       13         $     (45)       $    69,001
                                                                ================================================================
</TABLE>


     The Company's  investments in securities  held-to-maturity at June 30, 1997
were all due in one year or less by contractual maturity.  Estimated fair values
of marketable securities are based on quoted market prices.

4.   Contingency

     The Company and its majority  shareholder are defendants in a lawsuit filed
by a former  shareholder.  The suit requests  actual and punitive  damages in an
amount  that  cannot  be  readily  determined.  The  Company  and  its  majority
shareholder  believe the suit to be without merit and are  vigorously  defending
against  this  action.  The majority  shareholder  has agreed to  indemnify  and
reimburse the Company for all damages and expenses, net of tax benefits received
by the Company,  related to this action. For the three and six months ended June
30, 1997, the Company and majority  shareholder  have incurred legal expenses of
approximately $30,000 and $83,000, respectively,  which have been assumed by the
majority shareholder.  Although the majority shareholder has agreed to indemnify
the Company for all expenses or  settlements,  if any, in  connection  with this
suit, the Company will continue to record such expenses or settlements,  if any,
as an  expense  with an  offsetting  increase  to  paid-in  capital,  net of tax
effects.

5.  Exit Charge

     In June 1996 the Company purchased approximately 27 acres of vacant land in
Vernon Hills,  Illinois,  upon which it  constructed  a combined  telemarketing,
warehouse,  showroom and corporate office  facility.  Construction of the Vernon
Hills  facility was completed in July 1997, at which time the Company  relocated
to the new facility and vacated the Buffalo Grove facility. The Company recorded
a $4.0 million pre-tax  non-recurring charge to operating results for exit costs
relating to the Buffalo Grove  facility in the first  quarter of 1996.  The exit
costs consist  primarily of the estimated  cost to the Company of subleasing the
vacated facility,  including holding costs, the estimated costs of restoring the
building to its original  condition and certain asset write-offs  resulting from
the  relocation.  There is no  assurance  that the $4.0  million  charge will be
adequate  to cover  actual  costs  should the  Company's  actual  experience  in
subleasing the facility differ from the assumptions used in calculating the exit
charge.  As a result of the move, the Company  incurred moving costs of $200,000
which were  charged to  operating  results  in the  second  quarter of 1997.  No
further moving costs are expected to be incurred.
                                      
                                       6

<PAGE>  9

     As of June 30, 1997  approximately  $17.5  million in  construction  costs,
including $6.1 million for land acquisition, have been incurred and are included
in  construction-in-progress.  The Company has entered into various construction
and equipment  contracts,  relating to the new facility,  which  aggregate $16.8
million,   of  which  $11.4  million  has  been  incurred  and  is  included  in
construction-in-progress  as of June 30, 1997. Pursuant to these contracts,  the
Company is committed  for an  additional  $5.4  million.  The Company  currently
estimates it will incur  approximately  $23.0 to $24.0  million in total capital
expenditures  related to purchasing the land and  constructing and equipping the
facility.

6.    Financing Arrangements

     The Company has an aggregate  $30 million  available  pursuant to unsecured
lines of  credit  with  two  financial  institutions  expiring  in  June,  1998.
Borrowings  under one of the credit  facilities  bear interest at the prime rate
less 2 1/2%,  LIBOR plus 1/2% or the federal funds rate plus 1/2%, as determined
by the Company. Borrowings under the second credit facility bear interest at the
prime rate less 2 1/2%,  LIBOR plus .45% or the federal funds rate plus .45%, as
determined  by the Company.  At June 30, 1997 there were no  borrowings  against
either of the credit facilities.

     In September,  1996 the Company established a stand-by letter of credit for
approximately  $1.7 million  related to  construction  of the new facility.  The
Company   has  pledged  a  U.S.   Treasury   Note,   included   in   investments
held-to-maturity, with a face value of $2.0 million as collateral for the letter
of credit.

                                       7

<PAGE>  10



Item 2.       Management's Discussion and Analysis of Financial Condition
              and Results of Operations

The following  discussion and analysis of the Company's  financial condition and
results of operations should be read in conjunction with the Company's unaudited
condensed  consolidated  financial  statements  and the notes  thereto  included
elsewhere herein.

Results Of Operations
     The  following  table sets forth  financial  information  derived  from the
Company's  statements  of income  expressed  as a percentage  of net sales,  and
certain operating statistics. The financial information for the six months ended
June 30,  1997 and 1996 is  presented  on a pro forma  basis to exclude the exit
charge and related  impact on the  executive  incentive  bonus pool,  net of tax
effects.

<TABLE>
<CAPTION>
FINANCIAL INFORMATION                                          Percentage of Net Sales
                                                               -----------------------         
                                          Three Months Ended June 30,             Six Months Ended June 30,
                                          ---------------------------            --------------------------
                                             1997             1996                 1997             1996
                                           --------         --------             --------         --------
                                                                                       (Pro Forma)
<S>                                        <C>              <C>                  <C>              <C>    
Net sales                                   100.0 %          100.0 %              100.0 %          100.0 %
Cost of sales                                86.3             86.5                 86.5             86.8
                                             ----             ----                 ----             ----
Gross profit                                 13.7             13.5                 13.5             13.2
Selling and administrative expenses           7.1              7.6                  7.1              7.5            
                                              ---              ---                  ---              ---
Income from operations                        6.6              5.9                  6.4              5.7
Other income, net                             0.3              0.4                  0.3              0.4
                                              ---              ---                  ---              ---
Income before income taxes                    6.9              6.3                  6.7              6.1
Income tax provision                          2.7              2.4                  2.6              2.3
                                              ---              ---                  ---              ---
Net income                                    4.2 %            3.9 %                4.1 %            3.8 %
                                              ===              ===                  ===              ===


<CAPTION>
Operating Statistics                                         Three Months Ended                     Six Months Ended
                                                                   June 30,                             June 30,
                                                           ------------------------             ------------------------
                                                               1997            1996                 1997            1996
                                                               ----            ----                 ----            ----
<S>                                                        <C>             <C>                  <C>             <C>
Number of orders shipped (000's)                                425             302                  870             602
Average order size                                         $    717        $    725             $    692        $    707
Customers serviced (000's)                                      182             146                  328             254
Number of account managers, end of period                       319             256                  319             256
Catalogs distributed (000's)                                 19,172          12,904               39,156          25,812
National advertising pages placed                               185             159                  397             309
Inventory turns                                                  19              23                   24              23

</TABLE>

                                       8

<PAGE>  11



     The following  table  presents net sales by product line as a percentage of
total  net  sales  for each of the  periods  noted.  Product  mix is based  upon
internal  product code  classifications  and is  retroactively  adjusted for the
addition  of  new  categories   but  not  for  changes  in  individual   product
categorization.

Product Mix                  Three Months Ended            Six Months Ended
                                  June 30,                     June 30,
                           ------------------------    ------------------------
                               1997        1996             1997        1996
                               ----        ----             ----        ----
Notebooks & Laptops            26.9 %      26.6 %           25.6 %      26.3 %
Software                       12.6        12.3             12.8        12.1
Desktop Computers              12.4        11.6             12.8        11.7
Printers                       11.4        11.1             11.6        11.5
Data Storage Devices           10.4         9.2             10.4         8.8
Video                           7.5         7.4              7.8         7.5
Add-On Boards/Memory            4.8         6.2              4.7         6.6
Communications                  4.1         5.6              4.3         5.9
Network Products                4.5         4.3              4.4         4.2
Input Devices                   2.9         3.3              3.0         3.1
Multi-Media                     1.9         2.1              2.0         2.1
Other Accessories               0.6         0.3              0.6         0.2
                              -----       -----            -----       -----
Total                         100.0 %     100.0 %          100.0 %     100.0 %
                              =====       =====            =====       =====  

Three months ended June 30, 1997 compared with three months ended June 30, 1996

     Net sales were  $304.5  million  for the three  months  ended June 30, 1997
compared  with  $218.7  million for the three  months  ended June 30,  1996,  an
increase of $85.8 million or 39.2%.  Average order size decreased  approximately
1% to $717 from $725 in the second  quarter of 1996.  The growth in net sales is
primarily  attributable  to higher order volume  resulting from the expansion of
marketing efforts, new product offerings, an increase in the number of customers
serviced and an increase in the number of account managers.

     Selling prices on many models of notebook and desktop  computers  decreased
from previous  periods,  resulting in notebook and desktop  computer unit volume
growth of 82% and 66%,  respectively,  from the second  quarter  of 1996.  Lower
manufacturer  pricing levels and expanded product features in notebook computers
resulted in a shift  within the notebook  and laptop  product  category to lower
priced models.  This combination served to lower overall unit selling prices and
increase  order  volume in the  second  quarter of 1997  compared  with the same
quarter of 1996.  Any  reduction  in the  quantities  of  notebook  and  desktop
computers available to the Company from the manufacturers  producing these items
could have an adverse effect on future sales.

     Gross profit  increased as a percentage of net sales to 13.7% for the three
months ended June 30, 1997,  compared with 13.5% for the three months ended June
30, 1996. The increase in gross profit as a percentage of net sales is primarily
due to the expansion of selling margin on certain  product lines  resulting from
vendor support programs, opportunistic purchases and pricing strategies. Many of
the vendor  support  programs  are  dependent  on  achieving  certain  goals and
objectives.  Actual gross profit  achieved may vary on a quarterly  basis due to
changes in vendor support  programs,  product mix,  market  conditions and other
factors.  As a result,  there is no  certainty  that the Company will be able to
sustain  gross  profit as a  percentage  of net sales at the levels  achieved in
recent quarters.

     Selling and  administrative  expenses decreased to 7.1% of net sales in the
second quarter versus 7.6% in the second quarter of 1996. For the second quarter
of 1997, an increase in net  advertising  expense due to  incremental  marketing
activities  and  $200,000 of moving  costs were offset by  decreases  in various
components  of selling and  administrative  expenses.  The  reduction of various

                                       9

<PAGE>  12

components  of  selling  and  administrative  expenses  resulted  from  improved
productivity   and   leveraging  of  fixed  costs  over  a  larger  sales  base.
Additionally,  selling and administrative  expense in the second quarter of 1996
included a $281,000  charge  related to the  trade-in  of an  internal  computer
system.  As a result of the move to the new  facility in July 1997,  selling and
administrative expenses may rise as a percentage of sales due to the increase in
occupancy  costs  and  the  inefficiencies  inherent  in the  start-up  of a new
warehouse.

     Net advertising expense increased as a percentage of net sales to 1.3% from
1.1% in the three  months  ended  June 30,  1997 and 1996,  respectively.  Gross
advertising  expense  increased  to 3.5% of net sales for the three months ended
June 30,  1997  versus  3.1% for the three  months  ended  June 30,  1996 due to
expanded catalog  circulation and national  advertising  pages combined with new
marketing  initiatives.   Cooperative  advertising  reimbursements  earned  from
vendors decreased to 61% of gross advertising  expense for the second quarter of
1997 from 65% in the same period of 1996. The decrease in the reimbursement rate
was due in part to the initiation of certain  marketing  activities that are not
covered by cooperative reimbursement.  The cooperative advertising reimbursement
rate may  fluctuate  as a  percentage  of gross  advertising  spending in future
quarters depending on the level of vendor participation  achieved and collection
experience.  The Company plans to increase  advertising  expenditures  in future
quarters,  which may  result in an  increase  in net  advertising  expense  as a
percentage  of net sales and lower  operating  margins  than those  achieved  in
recent  quarters.  The  statement  concerning  future  advertising  expense is a
forward  looking   statement  that  involves  certain  risks  and  uncertainties
including  the ability to identify  and  implement  cost  effective  incremental
advertising and marketing programs.

     The executive  incentive  bonus pool,  which  pursuant to existing plans is
based  upon a  maximum  20% of the  year  over  year  increase  in  income  from
operations,  was $1.4 million for the three months ended June 30, 1997 and 1996,
and is included within selling and administrative expenses.

     Selling and  administrative  expenses  also  include  $30,000 and $8,000 in
legal costs incurred by the majority shareholder for the three months ended June
30, 1997 and 1996,  respectively,  in  connection  with the  lawsuit  filed by a
former  shareholder.  Although the majority  shareholder has agreed to indemnify
the Company for all expenses or settlements, if any, incurred in connection with
this suit, the Company will continue to record such expenses or settlements,  if
any, as an expense with an offsetting  increase to paid-in  capital,  net of tax
effects.

     Interest  income  totaled  $1.0 million for the three months ended June 30,
1997  compared  with  $842,000 for the three  months  ended June 30,  1996.  The
increase is due to higher  interest  rates  combined  with higher levels of cash
available  for  investment   resulting  from  cash  generated  from  operations,
including the tax benefit from stock option and restricted stock transactions in
the first  quarter of 1997,  offset by funds  utilized for  construction  of the
Vernon Hills facility.

     The effective  income tax rate,  expressed as a percentage of income before
income  taxes,  increased to 39.6% for the three months ended June 30, 1997 from
38.7% for the three months ended June 30, 1996.  The  effective  income tax rate
for the second  quarter of 1997 is  consistent  with the  effective  tax rate of
39.5% for the full year 1996.

     Net income for the three  months ended June 30, 1997 was $12.7  million,  a
49.4%  increase over $8.5 million for the three months ended June 30, 1996.  Net
income per share of $0.59 for the three  months  ended June 30,  1997  increased
51.3% from $0.39 in the same period of 1996.  All per share and related  amounts
have been adjusted to reflect the three-for-two stock split effected in the form
of a stock dividend paid on July 15, 1996.

Six months ended June 30, 1997 compared with the six months ended June 30, 1996

     Net sales  were  $602.3  million  for the six months  ended  June 30,  1997
compared with $425.4 million for the six months ended June 30, 1996, an increase
of  $176.9  million  or 41.6%.  Average  order  size for the  first  six  months
decreased approximately 2% to $692 from $707 for the corresponding period of the
previous year. The growth in net sales is primarily attributable to higher sales

                                       10

<PAGE>  13

volume resulting from the expansion of marketing efforts, new product offerings,
an increase in the number of customers serviced and an increase in the number of
account manager.

     Selling prices on many models of notebook and desktop  computers  decreased
from previous  periods,  resulting in notebook and desktop  computer unit volume
growth of 77% and 76%,  respectively,  from the first six months of 1996.  Lower
manufacturer  pricing levels and expanded product features in notebook computers
and the reduced  pricing  resulted  in a shift  within the  notebook  and laptop
product  category  to lower  priced  models.  This  combination  served to lower
overall  unit selling  prices and increase  order volume in the six months ended
June 30, 1997 compared with the six months ended June 30, 1996. Any reduction in
the quantities of notebook and desktop  computers  available to the Company from
the  manufacturers  producing these items could have an adverse effect on future
sales.

     Gross profit  increased  as a percentage  of net sales to 13.5% for the six
months  ended June 30, 1997,  compared  with 13.2% for the six months ended June
30, 1996. The increase in gross profit as a percentage of net sales is primarily
due to the expansion of selling margin on certain  product lines  resulting from
vendor support programs, opportunistic purchases and pricing strategies. Many of
the vendor  support  programs  are  dependent  on  achieving  certain  goals and
objectives.  Actual gross profit  achieved may vary on a quarterly  basis due to
changes in vendor support  programs,  product mix,  market  conditions and other
factors.  As a result,  there is no  certainty  that the Company will be able to
sustain  gross  profit as a  percentage  of net sales at the levels  achieved in
recent quarters.

     Selling  and  administrative  expenses,  excluding  the  impact of the exit
charge and its related impact on the executive  incentive bonus pool,  decreased
to 7.1% of net sales for the six months  ended  June 30,  1997 from 7.5% for the
six months ended June 30,  1996.  The decrease is mainly the result of decreases
in various  components of selling and  administrative  expenses through improved
productivity  and  leveraging of fixed costs over a larger sales base in the six
months ended June 30, 1997. As a result of the move to the new facility, selling
and  administrative  expenses  may  rise as a  percentage  of  sales  due to the
increase in occupancy costs and the inefficiencies inherent in the start-up of a
new warehouse.

     Net  advertising  expense as a percentage of net sales remained  consistent
with the prior year at 1.3% of net sales in the six months  ended June 30,  1997
and 1996. Gross  advertising  expense increased to 3.5% of net sales for the six
months  ended June 30, 1997  versus 3.3% for the six months  ended June 30, 1996
due to expanded catalog circulation and national advertising pages combined with
new marketing initiatives.  The increase in gross advertising expense was offset
by a corresponding  increase in cooperative  advertising  reimbursements  earned
from vendors to 62.0% of gross advertising  expenditures in the first six months
of 1997 from  61.6% in the same  period  of 1996.  The  cooperative  advertising
reimbursement  rate may fluctuate as a percentage of gross advertising  spending
in future quarters depending on the level of vendor  participation  achieved and
collection experience. The Company plans to increase advertising expenditures in
future quarters, which may result in an increase in net advertising expense as a
percentage  of net sales and lower  operating  margins  than those  achieved  in
recent  quarters.  The  statement  concerning  future  advertising  expense is a
forward  looking   statement  that  involves  certain  risks  and  uncertainties
including  the ability to identify  and  implement  cost  effective  incremental
advertising and marketing programs.

     Construction  of the Vernon Hills  facility was  completed in July 1997, at
which time the Company  relocated  to the new  facility  and vacated the Buffalo
Grove facility. The Company recorded a $4.0 million pre-tax non-recurring charge
to operating  results for exit costs  relating to the Buffalo Grove  facility in
the first  quarter of 1996.  The exit costs  consist  primarily of the estimated
cost to the Company of subleasing the vacated facility, including holding costs,
the  estimated  costs of restoring  the building to its original  condition  and
certain asset write-offs resulting from the relocation.

     The executive  incentive  bonus pool,  which  pursuant to existing plans is
based  upon a  maximum  20% of the  year  over  year  increase  in  income  from
operations,  was $3.7 million and $1.7 million for the six months ended June 30,
1997 and 1996,  respectively,  and is included within selling and administrative
expenses. The impact of the $4.0 million exit charge was to reduce the executive

                                       11

<PAGE>  14

incentive  bonus pool by $800,000 in the first  quarter of 1996 and  effectively
increase  it by  $800,000  in the first  quarter of 1997.  Thus,  the  executive
incentive  bonus  pool,  on a pro forma  basis to exclude the impact of the exit
charge in both  periods,  is $2.9  million  and $2.5  million for the six months
ended June 30, 1997 and 1996, respectively.

     Selling and  administrative  expenses  also include  $83,000 and $54,000 in
legal costs incurred by the majority  shareholder  for the six months ended June
30, 1997 and 1996,  respectively,  in  connection  with the  lawsuit  filed by a
former  shareholder.  Although the majority  shareholder has agreed to indemnify
the Company for all expenses or settlements, if any, incurred in connection with
this suit, the Company will continue to record such expenses or settlements,  if
any, as an expense with an offsetting  increase to paid-in  capital,  net of tax
effects.

     Interest income totaled $2.0 million for the six months ended June 30, 1997
compared with $1.7 million for the six months ended June 30, 1996.  The increase
is due to higher  interest  rates  combined with higher levels of cash available
for investment resulting from cash generated from operations,  including the tax
benefit from stock option and restricted stock transactions in the first quarter
of 1997, offset by funds utilized for construction of the Vernon Hills facility.

     The effective  income tax rate,  expressed as a percentage of income before
income  taxes,  increased  to 39.6% for the six months  ended June 30, 1997 from
38.8% for the six months ended June 30, 1996. The effective  income tax rate for
the first six months is consistent  with the effective tax rate of 39.5% for the
full year 1996.

      Net income for the six months  ended June 30,  1997 was $24.1  million,  a
72.1%  increase over $14.0  million for the six months ended June 30, 1996.  Net
income per share of $1.11 for the six months ended June 30, 1997 increased 70.8%
from $0.65 in the same  period of 1996.  Pro forma net income and net income per
share,  excluding  the impact of the exit charge and its  related  impact on the
executive  incentive bonus pool,  were $24.5 million and $1.13,  representing an
increase  of 53.6% and 52.7%,  respectively,  over the first six months of 1996.
All  per  share  and  related   amounts  have  been   adjusted  to  reflect  the
three-for-two  stock split effected in the form of a stock dividend paid on July
15, 1996.


Liquidity and Capital Resources

Working Capital

     The  Company  has   historically   financed  its   operations  and  capital
expenditures primarily through cash flow from operations,  short-term borrowings
and public offerings of common stock.

     At June 30, 1997,  the Company had cash,  cash  equivalents  and marketable
securities of $80.4 million and working capital of $145.8 million,  representing
an increase of $5.1 million in cash, cash equivalents and marketable  securities
and an increase of $22.2 million in working capital from December 31, 1996.

     As of June 30, 1997 the Company had an aggregate  $30.0  million  available
pursuant to unsecured credit facilities with two financial institutions expiring
in June, 1998.  Borrowings  under one of the credit  facilities bear interest at
the prime rate less 2 1/2%, LIBOR plus 1/2% or the federal funds rate plus 1/2%,
as determined by the Company.  Borrowings  under the second credit facility bear
interest  at the prime rate less 2 1/2%,  LIBOR plus .45% or the  federal  funds
rate plus .45%,  as  determined  by the Company.  At June 30, 1997 there were no
borrowings against either of the credit facilities.

     The Company's  current  primary and  anticipated use of cash is to fund the
growth  in  working  capital  and  capital  expenditures,  including  facilities
expansion.  The Company  believes that the funds held in cash, cash  equivalents
and marketable securities,  and funds available under the credit facilities will
be sufficient to fund the Company's  working  capital and cash  requirements  at
least through June 30, 1998.

                                       12

<PAGE>  15

Cash flows for the six months ended June 30, 1997

     Net cash provided by operating activities for the six months ended June 30,
1997 was $14.1  million.  The  primary  factors  which  historically  affect the
Company's  cash flows  from  operations  are  accounts  receivable,  merchandise
inventory and accounts  payable.  The increase in accounts  receivable  resulted
from  increased  sales  volume and an  increase in the  percentage  of net sales
generated from open credit terms to business customers,  offset by a decrease in
days sales  outstanding to 19.8 as of June 30, 1997 from 20.1 as of December 31,
1996. The Company  changed its credit terms during June 1997 to net 30 days from
net 10 days,  which may result in a future  increase in days sales  outstanding.
Inventory turns  increased to 24 annualized  turns for the six months ended June
30, 1997 from 23  annualized  turns for the six months ended June 30, 1996.  The
decrease in accounts  payable  reflects timing of payments to vendors at the end
of the respective  periods.  Prepaid expenses and other current assets increased
$262,000 to  approximately  $1.1  million as of June 30, 1997 and are  primarily
composed of paper purchased for future catalogs and prepaid insurance premiums.

    Cash provided by operating  activities  for the first six months of 1997 was
positively  impacted by a $5.8 million tax benefit  recorded to paid-in capital,
relating to the exercise and vesting of shares  pursuant to the MPK Stock Option
Plan and the MPK Restricted Stock Plan in February 1997.

     Net cash used in  investing  activities  for the six months  ended June 30,
1997  was  $19.2,   including   approximately  $9.3  million  used  for  capital
expenditures.  The  capital  expenditures  made by the  Company  were  primarily
related to progress  payments for construction and equipment  related to the new
facility.

     The Company ships a  substantial  quantity of its products to customers via
the United Parcel Service  ("UPS").  As a result of the strike by UPS workers on
August 4, 1997,  the Company is no longer able to use UPS for  shipments  to its
customers.  In an attempt to service its  customers,  the Company has  increased
shipping capacity with its other existing carriers and is also using alternative
carriers. However, due to carrier capacity constraints,  the Company is not able
to ship all orders on a same day basis as was its prior practice.  Additionally,
the Company is absorbing all incremental shipping costs incurred through the use
of these alternative  carriers.  As a result of the carrier capacity constraints
and absorbed  incremental  shipping  costs,  the  Company's  sales and operating
results may be  negatively  impacted.  The  magnitude of the impact is dependent
upon the  duration  and ultimate  resolution  of the UPS strike,  as well as the
Company's ability to continue to find and utilize alternative shipping carriers.

Facilities Expansion

     In June 1996, the Company  purchased  approximately 27 acres of vacant land
in  Vernon  Hills,   Illinois  for  the  purpose  of   constructing  a  combined
telemarketing,  warehouse,  showroom and corporate office facility.  The initial
phase of construction  includes  approximately  100,000 square feet of warehouse
space and  approximately  100,000 square feet of office space,  approximately  a
100% increase over the former  facility in Buffalo  Grove.  Construction  of the
Vernon  Hills  facility was  completed  in July 1997,  at which time the Company
relocated to the new facility and vacated the Buffalo Grove facility.

     As of June 30, 1997  approximately  $17.5  million in  construction  costs,
including $6.1 million for land acquisition, have been incurred and are included
in  construction-in-progress.  The Company has entered into various construction
and equipment  contracts,  relating to the new facility,  which  aggregate $16.8
million,   of  which  $11.4  million  has  been  incurred  and  is  included  in
construction-in-progress  as of June 30, 1997. Pursuant to these contracts,  the
Company  is  committed  for  an  additional  $5.4  million  as  construction  or
installation  is completed.  The Company  estimates it will incur  approximately
$23.0 to $24.0 million in total capital  expenditures  related to purchasing the
land and constructing and equipping the facility.

                                       13

<PAGE>  16

     If the  Company is unable to  generate  increased  sales and gross  margins
sufficient  to absorb  increased  overhead  and other  costs  created by the new
facility, the Company would likely experience lower pre-tax profits.

                                       14

<PAGE>  17



Part II       Other Information

Item 1.       Legal Proceedings

     As previously  reported,  the Company and Michael P. Krasny,  the Company's
majority  shareholder,  were  defendants in a lawsuit filed in the United States
District Court for the Northern District of Illinois, Eastern Division, in which
suit a former  shareholder,  executive  officer and director of the Company (the
"Plaintiff") alleged violations of the federal securities laws, fraud and breach
of fiduciary  duty in connection  with the Company's  redemption of his stock in
July 1990.  (Reference is made to Item 3 of the Company's  1996 Annual Report on
Form 10-K for a detailed discussion of the lawsuit.)

     On June 14, 1996,  the District  Court  granted the  defendant's  motion to
dismiss the Amended Complaint,  with prejudice,  on the grounds that the federal
cause of action was barred by the statute of limitations  and the District Court
did not have jurisdiction over the pendant state law claims. The Plaintiff filed
an appeal of the District  Court  decision to the United States Court of Appeals
for the  Seventh  Circuit.  On May 14,  1997,  the Court of  Appeals  heard oral
argument on Plaintiff's  appeal. On July 28, 1997, the Court of Appeals reversed
the District  Court's  ruling and remanded the matter back to the District Court
for further proceedings. The Court of Appeals held, among other things, that the
District Court  improperly  granted the motion to dismiss the Amended  Complaint
because it based its decision on inferences of fact  inappropriate at this stage
of the proceedings.

     On  June  10,  1997,  the  Plaintiff  filed  in the  Circuit  Court  of the
Nineteenth  Judicial  Circuit,   Lake  County,   Illinois,  a  lawsuit  alleging
essentially  the same fraud and breach of fiduciary duty claims  asserted in his
dismissed  federal  lawsuit.  The  Company  and Mr.  Krasny  have  answered  the
Complaint  and  moved  to  strike  a  portion  of the  relief  requested  by the
Plaintiff. In their answer to the Complaint, the Company and Mr. Krasny deny any
wrongdoing  or  liability.  The Company  anticipates  this action will likely be
dismissed  or stayed in light of the  subsequent  ruling by the Court of Appeals
discussed above.

     The Company  and Mr.  Krasny  believe  that their  actions  were honest and
proper and that the suit by the former shareholder is without merit. The Company
and Mr. Krasny are committed to vigorously defending the litigation.

     As previously reported,  Mr. Krasny has agreed to indemnify the Company for
any  and  all  costs,  fees  and  expenses  incurred  in  connection  with  this
litigation,  including  any expenses  incurred in judgment or  settlement of the
suit.

                                       15

<PAGE>  18



Item 4. Submission of Matters to a Vote of Security Holders.

        (a)  The Company held an annual meeting of Shareholders on May 7, 1997.

        (b)  The names of all Directors of the Company are set forth in (c) 
             below.

        (c)  Three matters were voted upon and approved by the
             Shareholders. The presentation below briefly describes the
             matter voted upon and results of Shareholders' votes.

        1.   Election of Directors
<TABLE>
<CAPTION>

                                                 Votes For         Votes Against         Abstentions
                                                 ---------         -------------         -----------
                <S>                             <C>                 <C>                  <C>  
                By Nominee
                ----------
                - Michael P. Krasny             20,215,583                41,639                  -
                - Gregory C. Zeman              20,215,583                41,639                  -
                - Daniel B. Kass                20,215,583                41,639                  -
                - Joseph Levy, Jr.              20,215,583                41,639                  -
                - Michelle L. Collins           20,215,583                41,639                  -
</TABLE>





        2.   Approval of Employee Incentive Bonus Pool

             The establishment of a performance-based  bonus pool to be paid to
             qualifying officers of the Company for the year ended December 31,
             1997.

                Votes For       Votes Against       Abstentions       Unvoted
                ---------       -------------       -----------       -------
               19,831,114             208,718            16,243       201,147

        3.   Ratification of Auditors

             The  selection  of  Coopers &  Lybrand,  LLP,  independent  public
             accountants,  as  auditors  of the  Company  for  the  year  ended
             December 31, 1997.

                Votes For       Votes Against       Abstentions
                ---------       -------------       -----------
               20,244,068               4,912             8,242

  
                                     16

<PAGE>  19



Item 6. Exhibits and Reports on Form 8-K

    (a) Exhibits

        EXHIBIT NO.          DESCRIPTION OF DOCUMENT
        -----------          -----------------------

        10 (mm)              Revolving  Note  between the Company and LaSalle
                             National  Bank dated June 29, 1997.

        10 (nn)              Revolving  Note  between  the  Company  and 
                             The  Northern  Trust Company dated June 30, 1997.


    (b) Reports on Form 8-K:

        There were no  reports on Form 8-K filed for the six months  ended
        June 30, 1997.

                                       17

<PAGE> 20



                                   SIGNATURES


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
     registrant  has duly  caused  this report to be signed on its behalf by the
     undersigned thereunto duly authorized.


                                                  CDW Computer Centers, Inc.
                                                  --------------------------
                                                  (Registrant)


     Date       August 14, 1997                   /s/ Harry J. Harczak, Jr.
               -----------------                  ----------------------------
                                                  Harry J. Harczak, Jr.
                                                  Chief Financial Officer

     Date       August 14, 1997                   /s/ Daniel F. Callen
               -----------------                  -----------------------------
                                                  Daniel F. Callen
                                                  Chief Accounting Officer

                                       18


<PAGE>  21






                                INDEX TO EXHIBITS


10 (mm) Revolving Note between the Company and LaSalle  National Bank dated June
        29, 1997.

10 (nn) Revolving Note between the Company and The Northern Trust Company 
        dated June 30, 1997.

                                       19



<PAGE>  1
                                 EXHIBIT 10 (mm)

                       REVOLVING NOTE BETWEEN THE COMPANY
                            AND LASALLE NATIONAL BANK
                               DATED JUNE 29, 1997

<PAGE>  2
                           REPLACEMENT REVOLVING NOTE

$15,000,000                                           Dated as of June 29, 1997
                                                            Due:  June 28, 1998


         On  or  before  June  28,  1998,  CDW  COMPUTER   CENTERS,   INC.  (The
"Undersigned"),  for value  received,  promise  to pay to the  order of  LASALLE
NATIONAL BANK, a national banking  association  (hereinafter,  together with any
holder thereof, called "Bank"), whose address is 135 S. LaSalle Street, Chicago,
Illinois  60603,  the  principle  sum of  Fifteen  Million  and  00/100  Dollars
($15,000,000)  or if less, the aggregate  unpaid  principle  amount of all loans
made  by the  Bank  to the  Undersigned  hereunder  (this  "Note").  The  unpaid
principle amount hereof shall bear interest at the  Undersigned's  option of the
following:

         (i)  a  fixed  rate  equal  to the  greater  of (A)  the  "Prime  Rate"
              (hereinafter  defined)  minus two and  one-half of one percent (-2
              1/2%) per annum,  or (B) the  "Federal  Funds  Rate"  (hereinafter
              defined)  plus  one-half  of one percent  (+1/2%)  per annum,  for
              borrowing not to exceed thirty (30) days, such rate to be fixed at
              the  beginning  of the term of such  borrowing  (the "Fixed  Prime
              Rate'); or

         (ii) a floating  rate equal to the  greater of (A) the Prime Rate minus
              two and  one-half  percent (-2 1/2%) per annum,  for  borrowing in
              excess  of  thirty  (30) days (the  "Floating  Prime  Rate");  the
              Floating  Prime  Rate and the Fixed  Prime  Rate are  referred  to
              herein collectively as the "Prime Rate"); or

         (iii)      "Adjusted LIBOR" (hereinafter defined).

         1.    For purposes hereof the following terms shall have the following
               definitions:

         "Prime  Rate" shall mean the rate in effect from time to time as set by
the Bank and called its Prime  Rate.  The  effective  date of any change in said
Prime  Rate  shall for  purposes  hereof be the date the rate is  changed by the
Bank.  The Bank shall not be obligated to give notice of any change in the Prime
Rate.

         "Federal  Funds  Rate"  shall mean,  for any day,  the daily  effective
Federal Funds rate for such day as published in the Federal Reserve  Statistical
Release H.15  ("H.15")  (or, if such  Release is not  published,  the  successor
thereto or closest  approximation  thereto,  as determined by the Bank) for such
day;  provided  that,  the  Federal  Funds Rate for any day on which the Federal
Reserve Bank of New York, (the "New York Fed") is not open for business shall be
the Federal Funds Rate for the next  preceding day on which the New York Fed was
open for business; and provided,  further, that if the Bank determines,  in good
faith,  that it is unable to  determine  the Federal  Funds Rate on the basis of
H.15,  then the  Bank  shall  determine  the  Federal  Funds  Rate  based on the
quotation of three (3) dealers in Federal  Funds in New York City, as reasonably
selected by the Bank, and the Bank's determination of such rate shall be binding
and conclusive absent manifest error.

         "Adjusted  LIBOR"  means a rate of  interest  equal to  one-half of one
percent  (1/2%) per annum in excess of the per annum rate of  interest  at which
U.S.  dollar  deposits  in an amount  comparable  to the amount of the  relevant
"LIBOR  Loan"  (hereinafter  defined)  and for a period  equal  to the  relevant
"Interest  Period"  (hereinafter  defined)  are  offered  generally  to the Bank
(rounded  upward,  if  necessary,  to the  nearest  1/16 of 1.00%) in the London
Interbank  Eurodollar  market at 11:00 a.m.  (London  time) two (2) banking days
prior to the commencement of each Interest Period, such rate to remain fixed for
such Interest Period.

         "Interest Period" shall mean successive one, two or three-month periods
as selected from time to time by the Undersigned by notice given to the Bank not
less than  three (3)  business  days  prior to the first day of each  respective
Interest  Period;  provided  that:  (i) each such one, two,  three-month  period
occurring  after such initial period shall commence on the day on which the next
preceding period expires;  (ii) the final Interest Period shall be such that its
expiration  occurs on or before the stated  maturity date of the Note; and (iii)
if for any reason the  Undersigned  shall fail to select  timely a period,  then
shall be  deemed to have  selected  a LIBOR  Loan with a one (1) month  Interest
Period; provided that, at any time any Interest Period expires less than one (1)
month before the maturity date of the Note,  then, for the period  commencing on
such  expiration  date and  ending on the  maturity  date such  LIBOR Loan shall
convert to a loan bearing interest at the Floating Prime Rate.

                                       1
<PAGE>  3

         2.   Interest  on that  portion  of the  outstanding  principle  amount
              hereof  bearing  interest at the Prime Rate shall be payable  from
              the date hereof on such aggregate  unpaid  principle amount on the
              last  day of each  month,  commencing  on July  31,  1997,  and at
              maturity  hereof.  Interest on LIBOR borrowing shall be payable at
              the  end  of  each  respective  Interest  Period.  Interest  after
              maturity (whether by reason of acceleration or otherwise) shall be
              paid on the unpaid  balance at the rate of the Floating Prime Rate
              plus two percent  (2%) per annum (the  "Default  Rate").  Interest
              shall be  computed on the basis of a year  consisting  of 360 days
              and shall be paid for the actual  number of days  elapsed,  unless
              otherwise specified herein.

         3.   Each LIBOR borrowing  hereunder  (each, a "LIBOR Loan") must equal
              $100,000 or an integral multiple  thereof.  Interest on each LIBOR
              Loan  shall be payable on the last  banking  day of each  Interest
              Period with respect thereto,  commencing on the first such date to
              occur  after the date  hereof,  at  maturity,  after  maturity  on
              demand,  and on the date of any payment hereon on the amount paid.
              The Undersigned hereby further promises to pay to the order of the
              Bank, on demand,  interest on the unpaid  principle  amount hereof
              after  maturity  (whether by  acceleration  or  otherwise)  at the
              Default Rate.

         4.   Provisions applicable to LIBOR Loans:(a) The Bank's determination
              of Adjusted LIBOR as provided above shall be conclusive, absent 
              manifest error.  Furthermore, if the Bank determines, in good 
              faith (which determination shall be conclusive, absent manifest 
              error), prior to the commencement of any Interest Period that (a) 
              U.S. dollar deposit of sufficient amount and maturity for funding 
              any LIBOR Loans are not available to the Bank in the London 
              Interbank Eurodollar market in the ordinary course of business, or
              (b) by reason of circumstances affecting the London Interbank
              Eurodollar market, adequate and fair means do not exist for 
              ascertaining the rate of interest to be applicable to the relevant
              LIBOR Loan, the Bank shall promptly notify the Undersigned and 
              such LIBOR shall automatically convert on the day of its 
              then-current Interest Period to a loan bearing interest at the 
              Floating Prime Rate.

         (b)  If, after the date hereof,  the  introduction of, or any change in
              any applicable law,  treaty,  rule,  regulation or guideline or in
              the  interpretation  or  administration  thereof by any government
              authority or any central bank or other  fiscal,  monetary or other
              authority having jurisdiction over the Bank or its lending offices
              (a "Regulatory  Change"),  shall, in the opinion of counsel to the
              Bank, makes it unlawful for the Bank to make or maintain any LIBOR
              Loan evidenced  hereby,  then the Bank shall  promptly  notify the
              Undersigned and such LIBOR Loan shall automatically convert on the
              last day of its  then-current  Interest  Period to a loan  bearing
              interest at the Floating Prime Rate.

         (c)  If,  for any  reason,  any  LIBOR  Loan is paid  prior to the last
              business day of its then-current  Interest Period, the Undersigned
              agrees to indemnify the Bank against any loss  (including any loss
              on redeployment of the funds repaid),  cost or expense incurred by
              the Bank as a result of such prepayment.

         (d)  If any Regulatory Change (whether or not having the force of law) 
              shall (a) impose, modify or deem applicable any assessment, 
              reserve, special deposit or similar requirement against assets 
              held by, or deposited in or for the account of or loans by, or any
              other acquisition of funds or disbursements by, the Bank: (b) 
              subject the Bank or any LIBOR Loan to any tax, duty, charge, stamp
              tax, or fee or change the basis of taxation of payment to the Bank
              principle or interest due from the Undersigned to the Bank 
              hereunder (other than a change in taxation of the overall net 
              income of the Bank); or (c) impose on the Bank any other 
              conditions regarding such LIBOR Loan or the Bank's funding 
              thereof, and the Bank shall determine (which determination shall 
              be conclusive, absent manifest error) that the result of the 
              forgoing is to increase the cost to the Bank of making or 
              maintaining such LIBOR Loan or to reduce the amount of principle 
              or interest received by the Bank hereunder, then the Undersigned 

                                       2

<PAGE>  4

              shall pay to the Bank, on demand and presentation of satisfactory
              documentation therefor, such additional amounts as the Bank shall,
              from time to time, determine are sufficient to compensate and 
              indemnify the Bank for such increased cost or reduced amount.

         5.   The Undersigned  hereby  authorizes the Bank to charge any account
              of the Undersigned for all sums due hereunder.  Principle payments
              submitted in funds not available until collected shall continue to
              bear interest until collected.  If payment  hereunder  becomes due
              and payable on a Saturday,  Sunday or legal  holiday under the law
              of the  United  States  or the  State  of  Illinois,  the due date
              thereof shall be extended to the next succeeding business day, and
              interest  shall be payable  thereon at the rate  specified  during
              such extension.

         6.   The Note evidences a revolving line of credit under which the 
              Undersigned is indebted to the Bank and evidences the aggregate 
              unpaid principle amount of all advances made or to be made by the
              Bank to the Undersigned under the Note.  All advances and 
              repayments hereunder shall be evidenced by entries on the books 
              and records of the Bank which shall be presumptive evidence of the
              principle amount and interest owing and unpaid on this Note, or 
              any renewal or extension hereof.  The failure to so record any 
              such amount or any error so recording any such amount shall not, 
              however, limit or otherwise affect the obligations of the 
              Undersigned hereunder or under any not to repay the principle 
              amount of the liabilities together with all interest accruing 
              thereon.  This Note may be used for direct advances or letter of
              credit.  Each letter of credit requested by the Undersigned shall 
              be subject to the terms and conditions of the Bank's standard 
              letter of credit application, which application is incorporated 
              herein by this reference.  The amount available to the 
              Undersigned under this Note shall be reduced by the face amount of
              all letters of credit issued and outstanding hereunder.  All 
              letters of credit issued hereunder shall have an expiry date no 
              later than the maturity date of this Note.  The Undersigned and 
              the Bank agree that each draw under any letter of credit shall 
              constitute, and shall be repaid by, a direct advance under this 
              Note on the date of such draw.  Each letter of credit requested by
              the Undersigned hereunder shall be issued by the Bank only after 
              the Bank has received a fully executed letter of credit 
              application on the Bank's standard form and the Bank's customary 
              fee for issuance of letters of credit.

         7.   Advances  under this Note may be made by the Bank upon the written
              request  of any two (2)  authorized  officers  of the  Undersigned
              whose  authority to so act has not been revoked by the Undersigned
              in writing  theretofore  received by the Bank at its main  office.
              Any such advances shall be conclusively presumed to have been made
              by the  Bank  to or  for  the  benefit  of  the  Undersigned.  The
              Undersigned does hereby  irrevocably  confirm,  ratify and approve
              all such  advances by the Bank and does hereby  indemnify the Bank
              against  loss  and  reasonable  expense  (including  court  costs,
              attorneys' and paralegals'  fees) and shall hold the Bank harmless
              with respect thereto.

         8.   The Undersigned shall be in default hereunder if: (a) any amount 
              payable on this and any and all other liabilities or obligations
              of the Undersigned to the Bank, howsoever created, arising or 
              evidenced, whether now existing or hereafter arising, whether now 
              due or to become due, whether direct, indirect, absolute, 
              contingent, joint, several, or joint and several (all such 
              liabilities and obligations, including this Note, are hereinafter 
              referred to as the "Obligations") or on the obligations of any 
              obligor hereunder, it not paid within five (5) days or when due; 
              or (b) the Undersigned shall otherwise fail to perform any of the
              promises to be performed by the Undersigned hereunder or under any
              other security agreement or other agreement with the Bank and the 

                                       3

<PAGE>  5

              same is not cured within thirty (30) days of notice thereof by the
              Bank; or (c) the Undersigned, or any other party liable with 
              respect to the Obligations, or any guarantor or accommodation 
              endorser or third party pledgor, shall make any assignment for the
              benefit of creditors, or there shall be commenced any bankruptcy, 
              receivership, insolvency, reorganization, dissolution or 
              liquidation proceedings by or against, or the entry of any 
              judgment, levy, garnishment, or other process (except for any 
              judgment, levy, attachment, garnishment or other process entered 
              pursuant to certain litigation instituted by John Marks, as 
              described in the Undersigned's 1997 proxy statement, as amended 
              from time to time), or the filing of any lien against the 
              Undersigned or any guarantor, or any other party liable with 
              respect to the Obligations, or accommodations endorser or third 
              party pledgor for any of the Obligations which has a material
              adverse effect on such party; or (d) the determination by the Bank
              that a material adverse change has occurred in the financial 
              condition of the Undersigned from the condition set forth in the 
              most recent financial statements of the Undersigned furnished to 
              the Bank, or from the financial condition of the Undersigned most 
              recently disclosed to the Bank in any matter and the same is not 
              cured within thirty (30) days of notice thereof by the Bank; or 
              (e) any oral or written warranty, representation, certificate or 
              statement of the Undersigned to the Bank is untrue in any material
              respect; or (f) failure of the Undersigned, within thirty (30) 
              days after a request by the Bank, to furnish financial information
              or to permit inspection by the Bank of the Undersigned's books and
              records; or (g) the occurrence of any material adverse event which
              causes a change in the financial condition of the Undersigned, or 
              which would have a material adverse effect on the business of the 
              Undersigned and the same is not cured within thirty (30) days 
              notice thereof by the Bank; provided, that any event relation to 
              the John Marks litigation as set forth in subsection (3) above 
              shall not be deemed to violate this subsection (g); or (h) the 
              Undersigned fails to have, at the end of each of its fiscal 
              quarters (1) a Tangible Net Worth of at least $35,000,000 or (2) a
              ratio of Liabilities to Tangible Net Worth of no greater than 
              2.0:1.0 and a default of either  (1) or (2) shall not be cured by
              the Undersigned within thirty (30) days.

         9.   For purpose  hereof,  "Tangible  Net Worth"  shall mean the sum of
              shareholders'  equity plus debt  subordinated  to the  Undersigned
              liabilities to the Bank,  minus  intangibles,  including,  but not
              limited to,  goodwill,  customer  lists,  prepaid items,  deferred
              charges,  debts owed by  officers  and other  affiliates  and such
              "Other  Assets" as set forth on the  financial  statements  of the
              Undersigned,  "Liabilities"  shall  mean  all  liabilities  of the
              Undersigned  that  would  be  shown  on a  balance  sheet  of  the
              Undersigned   prepared  in  accordance  with  generally   accepted
              accounting principles consistently applied.

         10.  Whenever the Undersigned shall be in default as aforesaid, without
              demand or notice of any kind except as set forth herein, the 
              entire unpaid amount of all Obligations shall become immediately 
              due and payable, and the Bank may exercise, from time to time, any
              and all rights and remedies available to it under the Uniform 
              Commercial Code of Illinois, or otherwise, including those 
              available under any written instrument (in addition to this Note) 
              relating to any of the Obligations and may, without demand or 
              notice of any kind, appropriate and apply toward the payment of 
              such of the Obligations, whether matured or unmatured including 
              reasonable costs of collections and reasonable attorneys' and
              paralegals' fees, and in such order of application as the Bank 
              may, from time to time, elect, balance, credits, deposits, 
              accounts or monies of the undersigned in possession, control or 
              custody of, or in transit of the Bank.

                                       4

<PAGE>  6

         11.  THE UNDERSIGNED WAIVES THE BENEFIT OF ANY LAW THAT WOULD OTHERWISE
              RESTRICT OR LIMIT THE BANK IN THE EXERCISE OF ITS RIGHTS, WHICH 
              HEREBY ACKNOWLEDGED, TO APPROPRIATE WITHOUT NOTICE, AT ANY TIME 
              HEREAFTER, ANY INDEBTNESS MATURED OR UNMATURED, OWING FROM THE 
              BANK TO THE UNDERSIGNED.  THE BANK MAY, FROM TIME TO TIME, WITHOUT
              DEMAND OR NOTICE OF ANY KIND, APPROPRIATE AND APPLY TOWARD THE 
              PAYMENT OF SUCH OF THE OBLIGATIONS, AND IN SUCH ORDER OF 
              APPLICATION, AS THE BANK MAY, FROM TIME TO TIME, ELECT ANY AND ALL
              SUCH BALANCE, CREDITS, DEPOSITS, ACCOUNTS, MONIES, CASH 
              EQUIVALENTS AND OTHER ASSETS OF OR IN THE NAME OF THE UNDERSIGNED,
              THEN OR THEREAFTER WITH THE BANK.  THE UNDERSIGNED DOES HEREBY 
              ASSIGN AND TRANSFER TO THE BANK ANY AND ALL CASH, NEGOTIABLE 
              INSTRUMENTS, DOCUMENTS OF TITLE, CHATTEL PAPER, SECURITIES,
              CERTIFICATES OF DEPOSIT, DEPOSIT ACCOUNTS, OTHER CASH EQUIVALENTS 
              AND OTHER ASSETS OF THE UNDERSIGNED IN THE POSSESSION OR CONTROL 
              OF THE BANK FOR ANY PURPOSE.

         12.  THE UNDERSIGNED WAIVES EVERY DEFENSE, CAUSE OF ACTION, 
              COUNTERCLAIM OR SET OFF WHICH THE UNDERSIGNED MAY NOT HAVE OR
              HEREAFTER MAY HAVE TO ANY ACTION BY BANK IN ENFORCING THIS NOT OR
              ANY OF THE OTHER OBLIGATIONS, RATIFIES AND CONFIRMS WHATEVER THE 
              BANK MAY DO PURSUANT TO THE TERMS HEREOF AND AGREES THAT THE BANK 
              SHALL NOT BE LIABLE FOR ANY ERROR OF JUDGEMENT OR MISTAKE OF FACT 
              OR LAW EXCEPT FOR THOSE ERRORS OR MISTAKES WHICH RESULT FROM THE 
              BANK'S GROSS NEGLIGENCE OR WILLFUL MISCONDUCT.  THE BANK AND THE 
              UNDERSIGNED, KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE 
              IRREVOCABLY THE RIGHT EITHER MAY HAVE TO TRAIL BY JURY WITH 
              RESPECT TO ANY LEGAL PROCEEDING BASED HEREON, OR ARISING OUT OF, 
              UNDER OR IN CONNECTION WITH THIS NOTE OR ANY OF THE OTHER 
              OBLIGATIONS, OR ANY AGREEMENT, EXECUTED OR CONTEMPLATED TO BE 
              EXECUTED IN CONJUNCTION HEREWITH OR ANY COURSE OF CONDUCT OR 
              COURSE OF DEALING IN WHICH THE BANK AND THE UNDERSIGNED ARE 
              ADVERSE PARTIES.  THIS PROVISION IS A MATERIAL INDUCEMENT FOR THE
              BANK GRANTING ANY FINANCIAL ACCOMMODATIONS TO THE UNDERSIGNED.


         13.  The Undersigned, and any other party liable with respect to the 
              Obligations, including any guarantors, and any and all endorsers 
              and accommodation parties, and each one of them, waive any and all
              presentment, demand, notice of dishonor, protest, and all other 
              notices and demands in connection with the enforcement of the 
              Bank's right hereunder, and hereby consent to, and waive notice of
              release, with or without consideration, of the Undersigned.  No 
              default shall be waived by the Bank except in writing.  No delay 
              on the part of the Bank in the exercise of any right or remedy 
              shall operate as a waiver thereof, and no single or partial 
              exercise by the bank of any right or remedy shall preclude other 
              or further exercise thereof, or the exercise of any other right or
              remedy.  This Note: (i) is valid, binding and enforceable in
              accordance with its provisions, and no conditions exist to the 
              legal effectiveness of this Note; (ii) contains the entire 
              agreement between the Undersigned and the Bank; (iii) is the final
              expression of the intention of the Undersigned and the Bank; and 
              (iv) superseded all negotiations, representations, warranties, 
              commitments, offers, contracts (of any kind of nature, whether 
              oral or written) prior to or contemporaneous with the execution 
              hereof.  No prior or contemporaneous representation, warranties, 
              understandings, offers or agreements of any kind or nature, 
              whether oral or written, have been made by the Bank or relied upon
              by the Undersigned is connection with the execution hereof.  No
              modifications, discharge, termination or waiver of any of the 
              provisions hereof shall be binding upon the Bank, except as 
              expressly set forth in a writing duly signed and delivered on 
              behalf of the Bank.

         14.  The  Undersigned   agrees  to  pay  all  reasonable  costs,  legal
              expenses, attorneys' fees and paralegals' fees of every kind, paid
              or  incurred  by the  Bank  in  enforcing  its  rights  hereunder,
              including, but not limited to, litigation or proceedings initiated
              under the  United  States  Bankruptcy  Code,  or in respect to any
              other of the  Obligations,  or in  defending  against any defense,
              cause of action, counterclaim,  set off or crossclaim based on any
              act of  commission  or omission  by the Bank with  respect to this
              Note or any other of the  Obligations,  promptly  on demand of the
              Bank or other person paying or incurring the same.

                                       5

<PAGE>  7

         15.  TO INDUCE THE BANK TO MAKE THE LOAN EVIDENCED BY THIS NOTE, THE 
              UNDERSIGNED IRREVOCABLY AGREES THAT ALL ACTIONS ARISING DIRECTLY 
              OR INDIRECTLY AS A RESULT OR IN CONSEQUENCE OF THIS NOTE OR ANY 
              OTHER AGREEMENT WITH THE BANK SHALL BE INSTITUTED AND LITIGATION 
              ONLY IN COURTS HAVING SITUS IN THE CITY OF CHICAGO, ILLINOIS, AND 
              THE UNDERSIGNED HEREBY CONSENTS TO THE EXCLUSIVE JURISDICTION AND 
              VENUE OF ANY STATE OR FEDERAL COURT LOCATED AND HAVING ITS SITUS 
              IN SAID CITY, AND WAIVES ANY OBJECTION BASED ON FORUM NON 
              CONVENIENS.  THE UNDERSIGNED HEREBY WAIVES PERSONAL SERVICE OF ANY
              AND ALL PROCESS, AND CONSENTS THAT ALL SUCH SERVICE OF PROCESS MAY
              BE MADE BY CERTIFIED MAIL, RETURN RECEIPT REQUESTED, DIRECTED TO 
              THE UNDERSIGNED AT THE ADDRESS INDICATED IN THE BANK'S RECORDS IN 
              THE MANNER PROVIDED BY APPLICABLE STATUTE, LAW, RULE OF COURT OF 
              OTHERWISE.

         16.  The loan evidenced hereby has been made and this Note has been 
              delivered at the Bank's main office.  This Note shall be governed
              and construed in accordance with the laws of the State of 
              Illinois, in which state it shall be performed, and shall be 
              binding upon the Undersigned and its successors and assigns.  If 
              this Note contains any blanks when executed by the Undersigned, 
              the Bank is hereby authorized, without notice to the Undersigned, 
              to complete any such blanks according to the terms upon which the 
              loan or loans were granted.  Wherever possible, each provision of 
              the Note shall be interpreted in such manner as to be effective 
              and valid under applicable law, but if any provision of this Note 
              shall be prohibited by or be invalid under such law, such 
              provision shall be severable, and be deemed ineffective to the 
              extent of such prohibition or invalidity without invalidating the 
              remaining provisions of this Note.  If more than one party shall 
              execute this Note, the term "Undersigned" as used herein shall 
              mean all parties signed this Note and their respective successors 
              and assigns, and such parties shall, as the case may be, be 
              jointly and severally obligated hereunder.

         17.  The  Undersigned  represents  and  warrants  to the Bank  that the
              execution  and delivery of this Note has been duly  authorized  by
              resolution  heretofore  adopted by its Board of  Directors  and in
              accordance with law and its bylaws,  that said resolution have not
              been  amended or  rescinded  are in full force and effect and that
              the officer or officers executing and delivering this Note for and
              on behalf of the  Undersigned  are duly  authorized so to act. The
              Bank, in extending financial accommodations to the Undersigned, is
              expressly  acting and relying upon the  aforesaid  representations
              and warranties.

         18.  The   undersigned   acknowledges   and  agrees  that  the  lending
              relationship  hereby  created  with  the  Bank  is  and  has  been
              conducted  on an open and arm's length basis in which no fiduciary
              relationship exists and that the Undersigned has not relied and is
              not relying on any such fiduciary relationship in consummating the
              loan evidence by this Note.

         19.  As used  herein,  all  provisions  shall  include  the  masculine,
              feminine,  neuter,  singular  and  plural  thereof,  wherever  the
              context and facts require such  construction and in particular the
              word "Undersigned" shall be so construed.

         20.  This  Note  is in  replacement  and  substitution  for,  but not a
              repayment of, that certain  $15,000,000  Revolving Note dated June
              30, 1996 of the  Undersigned  payable to the order of the Bank and
              does  not  and  shall  not be  deemed  to  constitute  a  novation
              therefor.

                                       6

<PAGE>  8

         IN WITNESS WHEREOF,  the Undersigned has executed this Note on the date
above set forth.


                                               CDW COMPUTER CENTERS, INC.


                                               By /s/ Michael P. Krasny
                                                  ---------------------
                                               Name: Michael P. Krasny
                                               Title: Chairman & Chief Executive
                                                      Officer


                                                By /s/ Harry J. Harczak, Jr.
                                                   -------------------------
                                                Name: Harry J. Harczak, Jr.
                                                Title: Chief Financial Officer



HJM:mm
July 14, 1997

67315-1

                                       7




<PAGE>  1

                                 EXHIBIT 10 (nn)

                       REVOLVING NOTE BETWEEN THE COMPANY
                         AND THE NORTHERN TRUST COMPANY
                               DATED JUNE 30, 1997



<PAGE>  2


$15,000,000.00                                      Chicago, Illinois
                                                    Note Date: June 30, 1997

                           LINE OF CREDIT DEMAND NOTE
                    (CORPORATION - FIXED AND FLOATING RATES)
                                  (UNCOMMITTED)

         ON DEMAND, for value received,  COMPUTER DISCOUNT  WAREHOUSE,  INC., an
Illinois  corporation  (the  "Borrower"),  promises  to pay to the  order of THE
NORTHERN TRUST COMPANY,  an Illinois  banking  corporation  (the "Lender"),  the
aggregate   unpaid   principal   balance  of  each  advance  (an  "Advance"  and
collectively the "Advances") made by the Lender to the Borrower  hereunder.  The
total principal  amount of Advances  outstanding at any one time hereunder shall
not exceed FIFTEEN MILLION and no/100ths UNITED STATES DOLLARS ($15,000,000.00).

         The unpaid  principal  balance of each Advance shall bear interest from
the date thereof until its interim maturity date, as reflected in the records of
the  Lender or on an  annexed  schedule  (the  "Interim  Maturity  Date") or the
occurrence of a demand for payment hereof, whichever is earlier, at the fixed or
floating  rate (as the  parties  may agree) set forth in an annexed  schedule or
otherwise in the Lender's  records.  The principal  amount of each Advance shall
mature and be payable on its  Interim  Maturity  Date,  unless the Lender  makes
prior demand for payment hereof, as provided below.
         Accrued  but unpaid  interest on each  Advance  shall be payable on the
earlier of (a) the last day of each month, (b) its Interim Maturity Date, or (c)
upon payment of such Advance in full (whether  pursuant to demand or otherwise).
Any  Advance  which is not paid in full on its  Interim  Maturity  Date or on or
before demand shall thereafter bear interest, payable upon demand, until paid at
a rate equal to two percent  (2%) in  addition  to the "Prime  Rate" (as defined
below).
         The Borrower hereby  authorizes the Lender to charge any account of the
Borrower  maintained  with the Lender for any amounts due or payable  hereunder;
unless the Borrower instructs otherwise, all Advances made to the Borrower under
this Note shall be credited to an account of the Borrower  with the Lender.  THE
LENDER AT ITS OPTION MAY MAKE ADVANCES  HEREUNDER AND IN SO DOING  SHALL BE
FULLY  ENTITLED  TO RELY  SOLELY  UPON  INSTRUCTIONS, INCLUDING  INSTRUCTIONS TO
MAKE TRANSFERS TO THIRD PARTIES,  REASONABLY BELIEVED BY THE LENDER TO HAVE BEEN
GIVEN BY AN AUTHORIZED  PERSON,  WITHOUT  INDEPENDENT INQUIRY OF ANY TYPE.
         For purposes  hereof,  "Prime Rate" means the rate of interest per year
announced  from time to time by the Lender called its prime rate,  which may not
at any time be the lowest rate  charged by the Lender.  Changes in the  interest
rate on any Advance  resulting from a change in the Prime Rate shall take effect
as set forth in each  announcement.  Interest  shall be computed  for the actual
number of days elapsed on the basis of a year consisting of 360 days,  including
the date an Advance  is made and  excluding  the date an Advance or any  portion
thereof is paid or prepaid.
         All payments  hereunder shall be payable at the principal office of the
Lender at 50 South LaSalle Street,  Chicago,  Illinois 60675, in lawful money of
the United States of America and in immediately available funds.
         The Borrower may prepay without  penalty or premium any Advance bearing
interest at a rate based on the Prime Rate. If the Borrower prepays, in whole or
in part,  any Advance  bearing any other interest rate or if the maturity of any
such fixed rate  Advance is  accelerated  upon  demand for payment  hereof,  the
Borrower shall also pay the Lender for all losses  (including but not limited to
interest  rate  margin) or  expenses  incurred by reason of the  liquidation  or
re-employment of deposits acquired by the Lender to make the Advance or maintain
principal  outstanding  at a fixed  rate.  Upon the  Lender's  demand in writing
specifying  such losses and expenses,  the Borrower shall promptly pay them; the
Lender's specification shall be deemed correct in the absence of manifest error.
Each Advance shall be conclusively deemed to have been funded by or on behalf of
the Lender by the purchase of a deposit  corresponding in amount to such Advance
and in maturity to such Advance's Interim Maturity Date.
         The Lender shall, and is hereby  authorized by the Borrower to, endorse
on a schedule  annexed to this Note or otherwise  record in its records the date
and principal amount of each Advance,  the Interim Maturity Date, the applicable
interest rate, and the date and amount of each payment of principal and interest
made by the Borrower with respect to each such Advance;  provided,  however, the
failure of the Lender to make any endorsement on any schedule shall not limit or
otherwise affect the right of the Lender to repayment of all Advances (including
interest thereon) made by the Lender to the Borrower.  The Lender's endorsements
as well as its  records  relating to Advances  shall be  rebuttably  presumptive
evidence of the outstanding principal and interest on the Advances.

                                       1

<PAGE>  3

         The Borrower  hereby  represents and warrants to the Lender that (a) it
is a corporation  existing and in good  standing  under the laws of its state of
incorporation and duly qualified, in good standing and authorized to do business
in each  jurisdiction  where the failure to so qualify would have a material and
adverse effect on its financial condition;  (b) the borrowings hereunder and the
execution and delivery of this Note are within the Borrower's  corporate powers,
have been duly authorized by all necessary  corporate action,  have received any
necessary  governmental  approval  and do not  contravene  or conflict  with any
provision  of  law or of the  charter  or  by-laws  of  the  Borrower  or of any
agreement  binding upon it; and (c) there has been no material adverse change in
the business, financial condition,  properties,  assets, operations or prospects
of the Borrower since the date of the latest financial statements provided by or
on behalf of the Borrower to the Lender.
         The   Borrower   shall  be  deemed  to  have   remade   the   foregoing
representations  and  warranties  each time it  requests  an Advance  hereunder,
except  that (c)  shall be deemed  to refer to the then  most  recent  financial
statements furnished to the Lender.
         All sums  outstanding  under  this Note  shall be  immediately  due and
payable  without  further action of any kind on the part of the Lender,  and the
Lender shall have and may exercise any and all rights and remedies  available at
law or in equity,  when the Lender demands  payment  hereof.  Such sums shall be
deemed to have been so demanded,  and shall be immediately and automatically due
and payable  without  any action of any kind on the part of the Lender,  and the
Lender shall have and may exercise any and all rights and remedies  available at
law or in equity, if any bankruptcy,  insolvency,  reorganization,  arrangement,
readjustment,  liquidation,  dissolution,  or similar  proceeding,  domestic  or
foreign,  is instituted  by the Borrower (or is instituted  against the Borrower
and  remains  undismissed  for more  than 60  days);  or if the  Borrower  shall
authorize  such  a  proceeding;  or if  the  Borrower  shall  become  insolvent,
generally  shall fail or be unable to pay its debts as they mature,  shall admit
in writing its  inability to pay its debts as they mature,  shall make a general
assignment for the benefit of its creditors, shall enter into any composition or
similar  agreement,  or shall  suspend the  transaction  of all or a substantial
portion of its usual business.

         All  notices,  requests and demands  hereunder  shall be deemed to have
been given or made when delivered by messenger or express delivery  service,  or
five (5) days after  deposit in the U.S.  mail,  first  class  postage  prepaid,
addressed, in each case:

         (A) if to the  Lender  to 50 South  LaSalle  Street, Chicago,  Illinois
             60675  (Attention:  Division  Head,  Mets I Division)
         (B) if to the Borrower to its address set forth below,

or to such other address as may be hereafter designated in writing by the 
respective parties hereto.

         THIS  NOTE  AND ANY  DOCUMENT  OR  INSTRUMENT  EXECUTED  IN  CONNECTION
HEREWITH SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE  WITH THE INTERNAL LAW
OF THE STATE OF ILLINOIS AND SHALL BE DEEMED TO HAVE BEEN EXECUTED AND DELIVERED
IN ILLINOIS.  Unless the context  requires  otherwise,  wherever used herein the
singular  shall  include  the  plural and vice  versa.  This Note shall bind the
Borrower,  its  successors  and  assigns,  and shall inure to the benefit of the
Lender, its successors and assigns, except that the Borrower may not transfer or
assign any of its rights or interest hereunder without the prior written consent
of the Lender.  The Borrower agrees to pay upon demand all expenses  (including,
without limitation,  reasonable  attorneys' fees, legal costs and expenses,  and
time  charges of  attorneys  who may be  employees  of the Lender,  in each case
whether  in or  out  of  court,  in  original  or  appellate  proceedings  or in
bankruptcy)  incurred or paid by the Lender or any holder  hereof in  connection
with the  enforcement  or  preservation  of its  rights  hereunder  or under any
document or instrument executed in connection  herewith.  The Borrower expressly
and irrevocably waives  presentment,  protest,  demand and notice of any kind in
connection herewith.

         BOTH  PARTIES HEREBY  IRREVOCABLY  AGREES THAT,  ALL SUITS,  ACTIONS OR
OTHER  PROCEEDINGS  WITH RESPECT TO, ARISING OUT OF OR IN  CONNECTION  WITH THIS
NOTE OR ANY  DOCUMENT  OR  INSTRUMENT  EXECUTED  IN CONNECTION HEREWITH SHALL BE
SUBJECT  TO  LITIGATION  IN  COURTS  HAVING SITUS WITHIN CHICAGO, ILLINOIS. BOTH
PARTIES  HEREBY CONSENTS AND SUBMITS TO THE JURISDICTION OF ANY LOCAL,  STATE OR
FEDERAL COURT LOCATED IN CHICAGO,  ILLINOIS,  AND HEREBY IRREVOCABLY  WAIVES ANY
RIGHT IT MAY HAVE TO REQUEST OR DEMAND TRIAL BY JURY, TO TRANSFER OR CHANGE  THE
VENUE  OF  ANY  SUIT,  ACTION  OR  OTHER  PROCEEDING  BROUGHT BY THE  LENDER  IN
ACCORDANCE  WITH  THIS  PARAGRAPH,  OR TO  CLAIM  THAT  ANY  SUCH PROCEEDING HAS
BEEN BROUGHT IN AN INCONVENIENT FORUM.

                                       2

<PAGE>  4

         NO PROVISION OF THIS NOTE OR ANY RELATED  DOCUMENT OR INSTRUMENT  SHALL
BE  CONSTRUED TO REQUIRE THE LENDER TO EXTEND ANY CREDIT OR MAKE ANY LOAN TO THE
BORROWER,  OR TO  REQUIRE  THE  BORROWER  TO  BORROW,  WHETHER OR NOT ANY FEE IS
PAYABLE BY THE BORROWER IN CONNECTION HEREWITH. THE BORROWER CLEARLY UNDERSTANDS
AND  AGREES  THAT  THIS  NOTE IS A DEMAND  OBLIGATION  PAYMENT  OF WHICH IN FULL
(INCLUDING  PRINCIPAL,  INTEREST,  AND ANY OTHER AMOUNTS) MAY BE DEMANDED BY THE
LENDER AT ANY TIME IN ITS DISCRETION WITHOUT PRIOR ORAL OR WRITTEN NOTICE OF ANY
KIND, AND REGARDLESS OF WHETHER OR NOT AN ADVANCE HAS BEEN  OUTSTANDING  THROUGH
OR BEYOND ITS INTERIM MATURITY DATE.

                        COMPUTER DISCOUNT WAREHOUSE, INC.


                        By: /s/ Harry Harczak
                            -------------------------
                        Name: Harry Harczak
                        Title: Chief Financial Officer


                        By: /s/ Michael P. Krasny
                            --------------------------
                        Name: Michael P. Krasny
                        Title: Chairman and Chief Executive Officer


                        Address for notices:
                        CDW Computer Centers, Inc.
                        200 North Milwaukee Ave.
                        Vernon Hills, Illinois 60061
                        Attention:  Mr. Harry Harczak

FORM 9640-B LARGE CORPORATE BORROWERS, UNCOMMITTED DEMAND LINE

                                       3

<PAGE>  5


                                                     June 10, 1997

Mr. Harry Harczak
Chief Financial Officer
CDW COMPUTER CENTERS, INC.
1020 E. Lake Cook Road
Buffalo Grove, IL 60089

Dear Harry:

The  interest  rate that The Northern  Trust  Company will offer you on Advances
made under the Line of Credit  Demand Note dated June 30,  1997  executed by CDW
Computer  Centers,  Inc.  are Prime - 2.5% (with a floor of NY Federal  funds +.
45%), NY Federal funds +. 45% or 30, 60, or 90 day LIBOR +. 45%.

YOU SHALL INCUR AND PAY A PREPAYMENT  PENALTY FOR ANY LOSS, IF ANY,  INCURRED BY
NORTHERN AS A RESULT OF THE PREPAYMENT OF ANY LIBOR ADVANCE, AND SUCH LOSS SHALL
BE CUSTOMARILY DETERMINED IN NORTHERN'S GOOD FAITH DISCRETION.

Please  indicate  your  acceptance  of the  above by  signing  this  letter  and
returning it to my attention at Northern by June 30, 1997.

                                                     Best regards,

                                                     /s/ BRIAN D, BEITZ
                                                     ------------------
                                                     Brian D. Beitz
                                                     Vice President

Accepted and Agreed
CDW Computer Centers, Inc.

By: /s/ MICHAEL P. KRASNY
    ---------------------
       Michael P. Krasny
       Chairman and Chief Executive Officer

By: /s/ HARRY J. HARCZAK
    --------------------
       Harry J. Harczak
       Chief Financial Officer

Date:    6-27-97
         -------

                                       4

<PAGE>  6
                                   CERTIFICATE
                        BORROWING RESOLUTION & INCUMBENCY
                                   CORPORATION

The undersigned  certifies that set forth below is a copy of a Resolution of the
Board of Directors of CDW Computer Centers,  Inc., an Illinois  corporation (the
"Corporation", or the "Borrower") which Resolution was properly adopted, has not
been modified or rescinded, and is still in effect:

Resolved that this Corporation  borrow from The Northern Trust Company an amount
not  to  exceed   Fifteen   Million  and   no/100ths   UNITED   STATES   DOLLARS
($15,000,000.00) at any one time outstanding pursuant to the terms of the Master
Note dated as of June 30, 1997 (the  foregoing  document(s),  together  with any
related   documents,    being   collectively    referred   to   as   the   "Loan
Document(s)")filed  with this resolution,  the form of which Loan Document(s) is
approved;  that the any two of the "Named" officers be designated to execute and
deliver the Loan  Documents  with such changes as (s)he may approve as evidenced
by his  (her)  execution  of the  Loan  Documents;  that  the  Secretary  or any
Assistant  Secretary be and each hereby is, acting alone,  authorized to, attest
the  execution;  that any two of the  "Named"  officers of this  Corporation  be
authorized  to request  borrowings  under the Loan  Documents,  to  execute  and
deliver  from  time to time any notes and other  documents  and  instruments  in
connection  therewith,  whether  or not  specifically  referenced  in  the  Loan
Documents,  and to take any actions  deemed  necessary  or  appropriate  by such
officer to carry out the  provisions  of the Loan  Documents  and such notes and
other  documents  and  instruments;  and that any  actions of the type set forth
above  previously  taken by any of the foregoing  officers are hereby  approved,
adopted and ratified.

The  undersigned  does hereby further  certify that the persons named below have
been duly elected or appointed, have duly qualified as, and on this day are, the
"Named"  officers  of the  Borrower,  as  indicated  below,  and that set  forth
opposite  the  respective  name of each is a  sample  of the  signature  of such
person:

     NAME                     OFFICE                     SIGNATURE

Michael P. Krasny         Chairman & CEO            /s/ MICHAEL P. KRASNY
- -----------------         --------------            ----------------------

Gregory Zeman               President               /s/ GREGORY ZEMAN
- -------------               ---------               ----------------------

Harry J. Harczak      Chief Financial Officer       /s/ HARRY J. HARCZAK
- ----------------      -----------------------       ----------------------

      Dated as of June 30,1997.


              Signature /s/ MICHAEL P. KRASNY
                       ----------------------

              Name: Michael P. Krasny
                   ------------------

              Title: Chairman, Chief Executive Officer, Secretary and Treasurer
                    -----------------------------------------------------------

              Name of Borrower: CDW Computer Centers, Inc.
                               ---------------------------

         The  undersigned  (MAY NOT BE THE SAME PERSON WHO SIGNS  ABOVE)  hereby
certifies that the person who executed the foregoing portion of this Certificate
on behalf of the  Borrower  have been duly  elected or appointed as Secretary of
the Borrower, and that set forth above is the signature of such person.

              Signature /s/ HARRY J. HARCZAK
                       ---------------------

              Type Name: Harry J. Harczak
                        -----------------

              Title: Chief Financial Officer
                    ------------------------

              Name of Borrower: CDW Computer Centers, Inc.
                               ---------------------------

                                       5

<PAGE>  7
                                   CERTIFICATE
                       NO AMENDMENT TO ARTICLES AND BYLAWS


         The undersigned  does hereby certify that the Articles of Incorporation
and  Bylaws  of  CDW  COMPUTER  CENTERS,  INC.  , an  Illinois  corporation,  as
previously  furnished to The Northern Trust Company under  Certificate(s)  dated
June 30,  1995 , have not been  amended,  modified or  rescinded  in any respect
since such date, and remain in full force and effect.

      Date as of June 30, 1997.


               Signature /s/ MICHAEL P. KRASNY
                        ----------------------

               Type Name    Michael P. Krasny
                        ----------------------

               Title Chairman, Chief Executive Officer, Secretary and Treasurer
                    -----------------------------------------------------------

               Name of Borrower   CDW Computer Centers, Inc.
                               -------------------------------





FORM 9718 (R 11/91)

                                       6


<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from Form 10-Q
dated June 30, 1997 and is qualified in its entirety by reference to such 
financial statements.
</LEGEND>                               
<MULTIPLIER>   1,000 
<CURRENCY>     U.S. Dollar
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 APR-01-1997
<PERIOD-END>                                   JUN-30-1997
<EXCHANGE-RATE>                                          1
<CASH>                                              11,354
<SECURITIES>                                        69,001
<RECEIVABLES>                                       65,917
<ALLOWANCES>                                         1,500
<INVENTORY>                                         47,012
<CURRENT-ASSETS>                                   198,728
<PP&E>                                              22,361
<DEPRECIATION>                                       4,878
<TOTAL-ASSETS>                                     224,704 
<CURRENT-LIABILITIES>                               52,902
<BONDS>                                                  0
                                    0
                                              0
<COMMON>                                               215 
<OTHER-SE>                                         171,587
<TOTAL-LIABILITY-AND-EQUITY>                       224,704
<SALES>                                            304,545
<TOTAL-REVENUES>                                   304,545
<CGS>                                              262,888
<TOTAL-COSTS>                                      262,888
<OTHER-EXPENSES>                                    21,586
<LOSS-PROVISION>                                         0
<INTEREST-EXPENSE>                                       0
<INCOME-PRETAX>                                     21,043
<INCOME-TAX>                                         8,343
<INCOME-CONTINUING>                                 12,700
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                        12,700
<EPS-PRIMARY>                                         0.59
<EPS-DILUTED>                                            0
        

</TABLE>


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