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 SEPTEMBER 30, 1999 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)


- --------------------------------------------------------------------------------
(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  November 15, 1999, 43,314,278 common shares were  issued  and  43,214,278
were outstanding.


 2



                           CDW COMPUTER CENTERS, INC.

                                TABLE OF CONTENTS

                                                                       Page No.
                                                                     -----------

PART I.      Financial Information

   Item 1.    Financial Statements (unaudited):

              Condensed Consolidated Balance Sheets -
              September 30, 1999 and  December 31, 1998                    1

              Condensed Consolidated Statements of Income -
              Three and nine months ended  September 30, 1999 and 1998     2

              Condensed Consolidated Statement of Shareholders' Equity -
              Nine months ended September 30, 1999                         3

              Condensed Consolidated Statements of Cash Flows -
              Nine months ended September 30, 1999 and 1998                4

              Notes to Condensed Consolidated Financial Statements       5 - 8


    Item 2.   Management's Discussion and Analysis of
              Financial Condition and Results of Operations              9 - 16


PART II.     Other Information

    Item 1.    Legal Proceedings                                           17
    Item 6.    Exhibits and Reports on Form 8-K                            17

               Signatures                                                  18

                                       ii

 3
PART I. FINANCIAL INFORMATION
ITEM I. FINANCIAL STATEMENTS

                  CDW COMPUTER CENTERS, INC. AND SUBSIDIARIES
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (in thousands)
                                   (unaudited)





                                                              September 30,           December 31,
                                                                  1999                    1998
                                                              -------------           ------------
ASSETS
                                                                                 
Current assets:
      Cash and cash equivalents                                 $  16,296              $   4,230
      Marketable securities                                        76,562                 66,458
      Accounts receivable, net of allowance for doubtful
        accounts of $4,300 and $3,185, respectively               242,700                152,308
      Miscellaneous receivables                                     6,400                  5,896
      Merchandise inventory                                        87,142                 64,392
      Prepaid expenses and other assets                             1,223                  1,423
      Deferred income taxes                                         4,886                  5,081
                                                                ---------              ---------

         Total current assets                                     435,209                299,788

Property and equipment, net                                        38,509                 37,056
Deferred income taxes and other assets                              7,125                  4,977
                                                                ---------              ---------

          TOTAL ASSETS                                          $ 480,843              $ 341,821
                                                                =========              =========

LIABILITIES AND SHAREHOLDERS' EQUITY

Current liabilities:
      Accounts payable                                          $  98,947              $  41,358
      Accrued expenses:
         Compensation                                              20,555                 16,279
         Income taxes                                                   -                  5,146
         Exit costs                                                 2,262                  2,715
         Other                                                      6,614                  5,560
                                                                ---------              ---------

          Total current liabilities                               128,378                 71,058
                                                                ---------              ---------

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; 43,266 and 43,142 shares issued
         respectively                                                 217                    216
      Paid-in capital                                              94,477                 81,352
      Retained earnings                                           260,446                192,259
      Unearned compensation                                          (586)                  (975)
                                                                ---------              ---------
         Subtotal shareholders' equity                            354,554                272,852
                                                                ---------              ---------
      Less cost of common shares in treasury, 100 shares           (2,089)                (2,089)
                                                                ---------              ---------
         Total shareholders' equity                               352,465                270,763
                                                                ---------              ---------

          TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY            $ 480,843              $ 341,821
                                                                =========              =========


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


                                       1

 4

                   CDW COMPUTER CENTERS, INC. AND SUBSIDIARIES
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                      (in thousands, except per share data)
                                   (unaudited)



                                                         Three Months Ended            Nine Months Ended
                                                            September 30,                September 30,
                                                   ----------------------------- ----------------------------
                                                        1999           1998          1999             1998
                                                   -------------   ------------- -------------    -------------
                                                                                       
 Net sales                                           $ 683,012       $ 462,720    $1,819,972       $1,256,256
 Cost of sales                                         597,398         403,857     1,591,705        1,096,539
                                                     ---------       ---------    ----------       ----------

 Gross profit                                           85,614          58,863       228,267          159,717

 Selling and administrative expenses                    43,523          31,707       118,423           84,350
                                                      ---------      ---------    ----------       ----------

 Income from operations                                 42,091          27,156       109,844           75,367

 Interest income                                         1,363           1,305         3,366            3,516
 Other expense                                             (96)            (77)         (317)            (239)
                                                     ---------       ---------    ----------       ----------

 Income before income taxes                             43,358          28,384       112,893           78,644

 Income tax provision                                   17,170          11,243        44,706           31,145
                                                     ---------       ---------    ----------       ----------

 Net income                                          $  26,188       $  17,141    $   68,187       $   47,499
                                                     =========       =========    ==========       ==========

 Earnings per share
    Basic                                            $    0.61       $    0.40    $     1.58       $     1.10
                                                     =========       =========    ==========       ==========
    Diluted                                          $    0.59       $    0.39    $     1.55       $     1.09
                                                     =========       =========    ==========       ==========

 Weighted average number of
 common shares outstanding
    Basic                                               43,150          43,076        43,104           43,086
                                                     =========       =========    ==========       ==========
    Diluted                                             44,108          43,344        43,972           43,404
                                                     =========       =========    ==========       ==========


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

                                        2

 5

                   CDW COMPUTER CENTERS, INC. AND SUBSIDIARIES
            CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY
                                 (in thousands)
                                  (unaudited)




                                                                                                                           Total
                                             Common Shares     Paid in    Retained      Unearned    Treasury Shares    Shareholders'
                                             Shares  Amount    Capital    Earnings    Compensation  Shares   Amount        Equity
                                             --------------------------------------------------------------------------------------
                                                                                               
BALANCE AT DECEMBER 31, 1998                 43,142  $  216   $  81,352   $ 192,259   $    (975)       100   $(2,089)  $  270,763

MPK Restricted Stock Plan forfeitures                              (101)                    101                                 -

Amortization of unearned compensation                                                       288                               288

Exercise of stock options                       124       1       1,545                                                     1,546

Tax benefit from stock option transactions                       11,681                                                    11,681

Net income                                                                   68,187                                        68,187
                                             --------------------------------------------------------------------------------------
BALANCE AT SEPTEMBER 30, 1999                43,266  $  217   $  94,477   $ 260,446   $    (586)      100    $(2,089)  $  352,465
                                             ======================================================================================




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

                                        3

 6


                  CDW COMPUTER CENTERS, INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)




                                                                               Nine Months Ended September 30,
                                                                               -------------------------------
                                                                                 1999                   1998
                                                                               --------               --------
                                                                                                
Cash flows from operating activities:

Net income                                                                     $ 68,187                $ 47,499

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

        Depreciation                                                              5,143                   3,429
        Accretion of marketable securities, net                                  (2,184)                 (2,033)
        Allowance for doubtful accounts                                           1,115                     935
        Stock-based compensation expense                                            288                     355
        Legal fees assumed by majority shareholder, net of tax                        -                     673
        Deferred income taxes                                                       698                     144
        Tax benefit from stock option exercises                                  11,681                   3,268


        Changes in assets and liabilities:
            Accounts receivable                                                 (91,507)                (49,554)
            Miscellaneous receivables                                              (504)                 (2,111)
            Merchandise inventory                                               (22,750)                  6,652
            Prepaid expenses and other assets                                       191                     (71)
            Accounts payable                                                     57,589                   1,472
            Accrued compensation                                                  4,276                   2,230
            Accrued income taxes and other expenses                              (4,092)                 (4,363)
            Accrued exit costs                                                     (453)                   (554)
                                                                               --------                --------

        Net cash provided by operating activities                                27,678                   7,971
                                                                               --------                --------

Cash flows from investing activities:

        Purchases of available-for-sale securities                              (66,703)                (24,810)
        Redemptions of available-for-sale securities                             44,292                  21,250
        Purchases of held-to-maturity securities                                (50,020)                (64,945)
        Redemptions of held-to-maturity securities                               64,511                  69,656
        Investments in and advances to joint venture                             (2,642)                      -
        Purchase of property and equipment                                       (6,596)                (12,426)
                                                                               --------                --------

        Net cash used in investing activities                                   (17,158)                (11,275)
                                                                               --------                --------

Cash flows from financing activities:

        Proceeds from exercise of stock options                                   1,546                     453
        Repurchases of treasury shares                                                -                  (2,089)
                                                                               --------                --------

        Net cash provided by / (used in) financing activities                     1,546                  (1,636)
                                                                               --------                --------

Net increase / (decrease) in cash                                                12,066                  (4,940)

Cash and cash equivalents - beginning of period                                   4,230                  18,233
                                                                               --------                --------

Cash and cash equivalents - end of period                                      $ 16,296                $ 13,293
                                                                               ========                ========



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

                                       4

  7


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


1.  Description of Business

     CDW  Computer  Centers,   Inc.  and  its  subsidiaries   (collectively  the
"Company") are engaged in the distribution of brand name personal  computers and
related  products  primarily  through  direct  marketing to end users within the
United  States.  The  Company's  primary  business is conducted  from a combined
sales,  corporate  office,  warehouse  and showroom  facility  located in Vernon
Hills,  Illinois.  The Company also  operates a sales  office in Buffalo  Grove,
Illinois,  a retail showroom in Chicago,  Illinois and a government sales office
in Chantilly, Virginia.

     The  Company  extends  credit to  business,  government  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 condensed consolidated 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 1998
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 1998  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  September  30,  1999 and  December  31,1998,  the results of
operations for the three and nine months ended  September 30, 1999 and 1998, the
cash  flows for the nine  months  ended  September  30,  1999 and 1998,  and the
changes in  shareholders'  equity for the nine months ended  September 30, 1999.
The  unaudited  condensed  consolidated  statements  of income for such  interim
periods are not necessarily indicative of results for the full year.

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

     A reconciliation  of basic and diluted earnings  per-share  computations in
accordance  with  Financial  Accounting  Standards  No. 128 "Earnings Per Share"
(SFAS 128) is included in Note 6 to the financial statements.

                                       5

 8

     On April 20,  1999,  the  Board of  Directors  of the  Company  approved  a
two-for-one  stock split to be effected in the form of a stock dividend  payable
on May 19, 1999 to all common shareholders of record at the close of business on
May 5, 1999.  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 September 30, 1999, were (in thousands):




                                                                                  Gross
                                                                                Unrealized
                                                                                  Holding
                                                              Estimated -------------------------   Amortized
                                                             Fair Value     Gains      (Losses)        Cost
                                                             -------------------------------------------------
                                                                                           
Security
Type
Available-for-sale:
      U.S. Government and Government Agency Securities         $  25,129    $    -   $     (19)     $   25,148
                                                             -------------------------------------------------
      Total available-for-sale                                    25,129         -         (19)         25,148
                                                             -------------------------------------------------

Held to maturity:
      U.S. Government and Government Agency Securities            51,356         -         (58)         51,414
                                                             -------------------------------------------------
      Total held-to-maturity                                      51,356         -         (58)         51,414
                                                             -------------------------------------------------
Total marketable securities                                    $  76,485    $    -   $     (77)      $  76,562
                                                             =================================================


      The Company's investments in securities  held-to-maturity at September 30,
1999 were all due in one year or less by  contractual  maturity.  Estimated fair
values of marketable securities are based on quoted market prices.

4.  Facilities & Exit Accrual

     In July 1997, the Company relocated to its current facility in Vernon Hills
and  vacated  its  Buffalo  Grove  facility.  The  Company  recorded  a  pre-tax
non-recurring charge to operating results for exit costs 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  Company  reopened  the office  portion of the Buffalo  Grove  facility
during the fourth quarter of 1998 as a telemarketing facility.  Accordingly, the
Company records a  proportionate  share of the rent and other operating costs to
selling and  administrative  expenses.  The  Company  sublet the  warehouse  and
showroom  portions of the Buffalo Grove facility to a third party for the period
beginning June 15, 1999, and  continuing  through  December 31, 2003, the end of
the lease term. The remaining portion of the rent not covered by the sublease or
the amount  recorded  to selling and  administrative  expenses  continues  to be
charged against the exit accrual.  There is no assurance that the remaining exit
liability  of $2.3  million at  September  30,  1999,  will be adequate to cover
actual  costs in the event the  sublessee is unable or unwilling to complete the
lease term.

     During the nine months  ended  September  30,  1999,  the  Company  charged
approximately  $453,000 against the exit accrual in cash payments for rent, real
estate taxes and maintenance of the facility, net of sub-lease payments received
which totaled approximately $187,000.  During the comparable period in 1998, the
Company  charged  approximately  $554,000  against the exit  accrual for similar
costs.

                                       6

 9

     On October 11,  1999 the Company  entered  into a lease  agreement  for two
floors of office space  totaling  approximately  72,000  square feet in Chicago,
Illinois. The Company plans to establish a sales office in the facility with the
lease  commencing  for one floor on April 1, 2000,  and for the second  floor on
September 1, 2000.  The lease provides a ten year term,  with certain  expansion
and  renewal  options.  The Company  plans to expend  between $8 million and $10
million for computer and telecommunication equipment, furniture and improvements
related to the  facility.  Minimum  future rent  payments for all the  Company's
lease  obligations,  including  the new  Chicago  facility  are as  follows  (in
thousands):


               Years Ended December 31,                              Amount
               ------------------------                        -----------------
               2000                                                    $   1,467
               2001                                                        1,925
               2002                                                        1,926
               2003                                                        1,958
               2004                                                        1,149
               Thereafter                                                  2,402
                                                               -----------------
                                                                       $  10,827
                                                               =================


5.  Financing Arrangements

     The Company has an  aggregate  $50  million  available  pursuant to two $25
million  unsecured  lines of credit with two financial  institutions,  one which
expires in June 2000, at which time the Company  intends to renew the line,  and
another which does not have a fixed expiration date.  Borrowings under the first
credit facility 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
September  30,  1999,  there  were no  borrowings  against  either of the credit
facilities.

     The Company has entered into  security  agreements  with certain  financial
institutions  ("Flooring  Companies")  in order to  facilitate  the  purchase of
inventory  from  various  suppliers  under  certain  terms and  conditions.  The
agreements  allow for a maximum credit line of $64.0 million  collateralized  by
inventory purchases financed by the Flooring  Companies.  At September 30, 1999,
all amounts owed the Flooring Companies are included in trade accounts payable.

 6.  Earnings Per Share

     The Company  had  approximately  43,266,000  issued and  43,166,000  shares
outstanding  at  September  30, 1999.  The Company has also  granted  options to
purchase  common  shares to the  directors  and  coworkers of the Company  under
several  stock  option  plans.  These  options  have a  dilutive  effect  on the
calculation  of earnings per share.  The  following is a  reconciliation  of the
numerators  and  denominators  of the  basic  and  diluted  earnings  per  share
computations as required by SFAS 128.

                                       7

 10




                                                  Three Months Ended                  Nine months Ended
                                                     September 30,                      September 30,
                                              ----------------------------       ----------------------------
                                                 1999            1998               1999            1998
                                              ------------    ------------       ------------    ------------
                                                                                    
     Basic earnings per share:
     Income available to
          common shareholders (numerator)        $ 26,188        $ 17,141           $ 68,187        $ 47,499
                                              ------------    ------------       ------------    ------------
     Weighted average common
          shares outstanding (denominator)         43,150          43,076             43,104          43,086
                                              ------------    ------------       ------------    ------------
     Basic earnings per share                    $   0.61         $  0.40           $   1.58         $  1.10
                                              ============    ============       ============    ============

     Diluted earnings per share:
     Income available to
          common shareholders (numerator)        $ 26,188        $ 17,141           $ 68,187        $ 47,499
                                              ------------    ------------       ------------    ------------
     Weighted average common
          shares outstanding                       43,150          43,076             43,104          43,086
     Effect of dilutive securities:
          Options on common stock                     958             268                868             318
                                              ------------    ------------       ------------    ------------
     Total common shares and dilutive
     securities (denominator)                      44,108          43,344             43,972          43,404
                                              ------------    ------------       ------------    ------------
     Diluted earnings per share                  $   0.59         $  0.39           $   1.55         $  1.09
                                              ============    ============       ============    ============



7.  Leasing Joint Venture

     In April 1999, CDW Capital Corporation,  a wholly-owned  subsidiary of CDW,
and  First  Portland  Corporation   ("FIRSTCORP")  formed  CDW  Leasing,  L.L.C.
("CDW-L"), a 50/50 joint venture. CDW-L provides captive leasing services to CDW
customers.  FIRSTCORP is a full-service  leasing  organization that has provided
third party leasing solutions to CDW customers for more than three years.  Under
the terms of an  operating  agreement,  FIRSTCORP  provides  leasing  management
services to CDW-L, with net earnings of the venture allocated 50% to CDW and 50%
to FIRSTCORP.  CDW Capital  Corporation  contributed  $100,000 to the capital of
CDW-L and has committed to loan up to $10 million to CDW-L on a secured basis to
fund new leases  initiated by CDW-L.  The  investment  in CDW-L is accounted for
using the equity method.  The investment and loan to CDW-L at September 30, 1999
is not  material to the total  assets of the Company and is included in Deferred
Income Taxes and Other Assets on the consolidated  Balance Sheets.  In addition,
the income  recognized by the Company from its investment in CDW-L for the three
and nine months ended  September  30, 1999 were not material to the total income
of the Company as reported on the consolidated Statements of Income.

                                       8

 11



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.




Financial Information                                                      Percentage of Net Sales
                                                          -----------------------------------------------------------
                                                             Three Months Ended             Nine months Ended
                                                               September 30,                  September 30,
                                                          -----------------------------------------------------------
                                                          -------------------------   -------------------------------
                                                              1999         1998             1999           1998
                                                                                            

Net sales                                                     100.0 %     100.0 %          100.0 %        100.0 %
Cost of sales                                                  87.5        87.3             87.5           87.3
                                                          -------------------------       ------------------------
Gross profit                                                   12.5        12.7             12.5           12.7
Selling and administrative expenses                             6.4         6.9              6.5            6.7
                                                          -------------------------       ------------------------
Income from operations                                          6.1         5.8              6.0            6.0
Other income, net                                               0.2         0.3              0.2            0.3
                                                          -------------------------      -------------------------
Income before income taxes                                      6.3         6.1              6.2            6.3
Income tax provision                                            2.5         2.4              2.5            2.5
                                                          -------------------------      -------------------------
Net income                                                      3.8 %       3.7 %            3.7 %          3.8 %
                                                          =========================      =========================






Operating Statistics                                       Three Months Ended                Nine months Ended
                                                             September 30,                     September 30,
                                                    -------------------------------      ----------------------------
                                                          1999           1998               1999           1998
                                                          ----           ----               ----           ----
                                                                                            
Number of invoices processed                            770,356        595,015            2,127,800      1,730,674
Average invoice size                                       $931           $828                 $901           $775
Number of account managers, end of period                   744            625
Customers serviced - commercial                         126,000        107,000              233,000        205,000
% of sales to commercial customers                        93.5%          89.0%                92.4%          87.2%
Annualized inventory turns                                   28             31                   28             25
                                                    ----------------------------------------------------------------



                                       9


 12



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



                                                Three Months Ended         Nine Months Ended
          Analysis of Product Mix                  September 30,             September 30,

                                                  1999      1998           1999        1998
                                                --------------------------------------------
                                                                          
          Notebooks & Laptops                     21.3 %   19.3 %           20.2  %   19.8 %
          Desktop Computers                       14.1     15.2             15.0      15.7
          Software                                13.0     13.7             13.3      13.6
          Printers                                11.1     12.7             11.4      12.7
          Data Storage Devices                    11.0     12.1             10.5      11.6
          Network & Communication Products         9.8      9.9              9.6       9.3
          Monitors & Video Products                7.1      7.6              7.2       7.9
          Add-On Boards & Memory                   4.7      3.7              4.6       4.0
          Supplies                                 3.7      1.1              3.6        .4
          Input Devices                            1.9      2.3              2.2       2.6
          Multi-Media Devices                      1.1      1.9              1.3       2.0
          Other Accessories                        1.2      0.5              1.1       0.4
                                                 -------------------------------------------
          Total                                  100.0 %  100.0 %          100.0  %  100.0 %
                                                 ===========================================


Three months ended  September 30, 1999 compared to three months ended  September
30, 1998

     Net sales in the third quarter of 1999  increased  47.6% to a record $683.0
million  compared to $462.7  million in the third quarter of 1998. The growth in
net sales is primarily  attributable  to a higher  concentration  of  commercial
accounts,  a higher  level of sales per  active  account  and  increases  in the
average  invoice  size and number of  invoices  processed.  Sales to  commercial
accounts,   including  business,   government,   educational  and  institutional
customers,  increased  to 93.5% of net sales in the third  quarter  of 1999 from
89.0% in the third quarter of 1998.  The number of active  commercial  customers
increased  17.8% to  126,000 in the third  quarter  of 1999 from  107,000 in the
third  quarter of 1998.  For the three months  ended  September  30,  1999,  the
average  invoice  size  increased  12.4%  to $931  and the  number  of  invoices
processed  increased  29.5% to over  770,000.  Notebook  computers  continue  to
represent the largest component of the Company's product mix.

     The average  selling price of desktop and server CPU's  decreased  1.3% and
the average selling price of notebook CPU's declined 5.3% from the third quarter
of 1998.  The  Company  believes  there may be future  decreases  in prices  for
personal  computers and related products.  Such decreases require the Company to
sell more  units in order to  maintain  or  increase  the  level of  sales.  The
Company's sales growth rate and operating results could be adversely affected by
future  manufacturer  price reductions or if the Company's  sales and  marketing
efforts  fail to  increase  the level of unit  sales.  Sales of Compaq,  Hewlett
Packard,  IBM, Microsoft and Toshiba products comprise a substantial  portion of
the Company's sales.  The loss of any of these, or any other key vendors,  could
have an adverse effect on the Company's  results from operations.  The statement
concerning future prices,  sales and results from operations are forward looking
statements that involve certain risks and uncertainties such as stated above.

                                       10

 13


     The fastest  growing  product  categories in terms of sales dollars and the
respective  growth  rates in the third  quarter  of 1999  compared  to the third
quarter of 1998 were:

      Product Category                         Growth Rate
      ----------------                         -----------
Add-On Boards & Memory                            87.7%
Notebooks & Laptops                               62.8%
Network and Communication Products                46.6%
Software                                          40.0%
Monitors & Video Products                         36.8%

Demand for certain  products and the growth of certain product  categories,  are
driven by  advances  in  technology  and the  development  of new  products  and
applications  by  the  industry  manufacturers,  and  acceptance  of  these  new
technologies   and  products  by   end-users.   Any  slowdown  in  the  rate  of
technological  advancement and new product development by industry manufacturers
could have a material adverse effect on the Company's future sales growth.

     Gross profit  decreased as a percentage of net sales to 12.5% for the three
months ended September 30, 1999, compared to 12.7% in the third quarter of 1998.
The  decrease in gross  profit as a  percentage  of net sales is  primarily  the
result of lower  selling  margins  achieved on certain  product  lines and lower
levels of vendor support programs. On a forward-looking basis, it is likely that
the gross profit margin  achieved will fluctuate from quarter to quarter and may
be lower than the 12.5%  achieved in the third  quarter of 1999.  The  statement
concerning  future gross profit is a forward  looking  statement  that  involves
certain risks and uncertainties  such as the continued  participation by vendors
in inventory price protection and rebate programs,  pricing strategies,  product
mix, market  conditions and other factors which could result in a fluctuation of
gross margins below recent experience. Certain manufacturers may make additional
changes  that  limit the  amount of price  protection  for which the  Company is
eligible.  Such changes  could have a negative  impact on gross margin in future
periods.  Vendor rebate programs are at the discretion of the vendor and many of
these  programs  are  dependent  on  achieving  certain  goals  and  objectives.
Accordingly,  there is no certainty  that such  programs  will continue at their
current levels or that the established goals and objectives will be attained.

     Selling and administrative expenses, which include net advertising expense,
other selling  administrative  expenses and the executive  incentive  bonus pool
declined to 6.4% of net sales in the three months ended  September 30, 1999 from
6.9% in the same period of 1998.

     Net  advertising  expense  decreased as a percentage  of net sales to 0.52%
from 0.85% for the three months ended September 30, 1999 and 1998, respectively.
Gross  advertising  expense  increased  $2.6  million,  while  decreasing  as  a
percentage  of net  sales in the  third  quarter  to 2.4% from 3.0% in the third
quarter of 1998. The Company decreased catalog circulation versus the prior year
while  increasing  the number of national  advertising  pages and  expanding its
spending  on  its  corporate   branding  campaign  and  other  direct  marketing
activities.  Based upon the  Company's  planned  marketing  initiatives,  future
levels of gross  advertising  expense as a percentage of net sales are likely to
be  relatively  consistent  with or higher than the level  achieved in the third
quarter  of  1999.  Cooperative  advertising   reimbursements   decreased  as  a
percentage  of net sales to 1.9% of net sales in the third  quarter of 1999 from
2.1% in the third quarter of 1998.  The  cooperative  advertising  reimbursement
rate  may  fluctuate  in  future  quarters  depending  on the  level  of  vendor
participation  achieved,  changes in vendor programs and collection  experience.
The statements concerning future advertising expense and cooperative advertising
reimbursements  are forward  looking  statements  that involve certain risks and
uncertainties  including  the ability to identify and implement  cost  effective
incremental  advertising  and  marketing  programs  as  well  as  the  continued
participation of vendors in the cooperative advertising reimbursement program.

     Other selling and  administrative  costs  decreased to 5.5% of net sales in
the third  quarter of 1999 from 5.7% in the same  period of 1998.  Increases  in
coworker  productivity  offset increased payroll and associated costs related to
expansion of the sales force.  As of  September  30, 1999,  there were 744 sales

                                       11

 14

account  managers,  an increase of 19.0% from 625 sales  account  managers as of
September  30, 1998.  Approximately  76% of the 744 sales  account  managers had
fewer than 24 months experience and 56% had fewer than 12 months, as compared to
72% and 56% at September  30, 1998.  The Company plans to increase the number of
sales  account  managers to 800 by December  31, 1999 and to within the range of
1,050 to 1,150 by December 31, 2000.

     In October 1999,  the Company agreed to lease  approximately  72,000 square
feet of office  space in Chicago,  Illinois as an  additional  sales office (see
Working  Capital and Footnote 4 to the  financial  statements).  Average  annual
future  minimum  lease  expense for the new sales office is  approximately  $1.1
million per year. As a result of the  expansion  of the sales  force and the new
sales office the Company's  selling and  administrative  costs may increase as a
percentage of net sales in future periods.

     The executive  incentive  bonus pool increased to $2.5 million in the third
quarter of 1999 from $1.0 million in the third  quarter of 1998.  For 1999,  the
Compensation and Stock Option Committee established the bonus pool at 15% of the
increase in operating income over the prior year.

     Interest income, net of other expenses,  increased slightly to $1.3 million
in the third  quarter of 1999  compared to $1.2 million in the third  quarter of
1998.

     The effective  income tax rate,  expressed as a percentage of income before
income taxes, was 39.6% for the three months ended September 30, 1999 and 1998.

     Net  income  for the three  months  ended  September  30,  1999,  was $26.2
million,  a 52.8%  increase  over  $17.1  million  for the  three  months  ended
September  30, 1998.  Diluted  earnings per share was $0.59 for the three months
ended  September  30, 1999 and $0.39 in the same period of 1998,  an increase of
51.3%. All per share amounts have been adjusted to reflect the two-for-one stock
split effected in the form of a stock dividend paid on May 19, 1999.

Nine months ended September 30, 1999 compared to nine months ended September 30,
1998

     Net sales in the first  nine  months  of 1999  increased  44.9% to a record
$1.820 billion  compared to $1.256 billion in the first nine months of 1998. The
growth in net  sales is  primarily  attributable  to a higher  concentration  of
commercial accounts, a higher level of sales per active account and increases in
the average invoice size and number of invoices  processed.  Sales to commercial
accounts,   including  business,   government,   educational  and  institutional
customers, increased to 92.4% of net sales in the first nine months of 1999 from
87.2% in the  first  nine  months  of 1998.  The  number  of  active  commercial
customers  increased  13.7% to  233,000  in the first  nine  months of 1999 from
205,000 in the first nine months of 1998.  For the nine months  ended  September
30, 1999,  the average  invoice size  increased  16.3% to $901 and the number of
invoices  processed  increased  23.0% to over 2.1  million.  Notebook  computers
continue to represent the largest component of the Company's product mix.

     The average  selling price of desktop and server CPU's  increased  4.4% and
the average  selling price of notebook  CPU's  declined 4.1% from the first nine
months of 1998. The Company believes there may be future decreases in prices for
personal  computers and related products.  Such decreases require the Company to
sell more  units in order to  maintain  or  increase  the  level of  sales.  The
Company's sales growth rate and operating results could be adversely affected by
future  manufacturer  price reductions or if the Company's  sales and  marketing
efforts  fail to  increase  the level of unit  sales.  Sales of Compaq,  Hewlett
Packard,  IBM, Microsoft and Toshiba products comprise a substantial  portion of
the Company's sales.  The loss of any of these, or any other key vendors,  could
have an adverse effect on the Company's  results from operations.  The statement
concerning future prices,  sales and results from operations are forward looking
statements that involve certain risks and uncertainties such as stated above.

                                       12

 15


     The fastest  growing  product  categories in terms of sales dollars and the
respective  growth rates in the nine months ended September 30, 1999 compared to
the nine months ended September 30, 1998 were:

      Product Category                       Growth Rate
      ----------------                       -----------
Add-On Boards & Memory                          66.9%
Network & Communication Products                48.9%
Notebooks & Laptops                             48.3%
Software                                        41.5%
Desktop Computers                               38.3%

Demand for certain  products and the growth of certain product  categories,  are
driven by  advances  in  technology  and the  development  of new  products  and
applications  by  the  industry  manufacturers,  and  acceptance  of  these  new
technologies   and  products  by   end-users.   Any  slowdown  in  the  rate  of
technological  advancement and new product development by industry manufacturers
could have a material adverse effect on the Company's future sales growth.

     Gross profit  decreased as a percentage  of net sales to 12.5% for the nine
months ended  September 30, 1999,  compared to 12.7% in the first nine months of
1998. The decrease in gross profit as a percentage of net sales is primarily the
result of lower  selling  margins  achieved on certain  product  lines and lower
levels of vendor support programs. On a forward-looking basis, it is likely that
the gross profit margin  achieved will fluctuate from quarter to quarter and may
be lower than the 12.5% achieved in the first nine months of 1999. The statement
concerning  future gross profit is a forward  looking  statement  that  involves
certain risks and uncertainties  such as the continued  participation by vendors
in inventory price protection and rebate programs,  pricing strategies,  product
mix, market  conditions and other factors which could result in a fluctuation of
gross margins below recent experience. Certain manufacturers may make additional
changes  that  limit the  amount of price  protection  for which the  Company is
eligible.  Such changes  could have a negative  impact on gross margin in future
periods.  Vendor rebate programs are at the discretion of the vendor and many of
these  programs  are  dependent  on  achieving  certain  goals  and  objectives.
Accordingly,  there is no certainty  that such  programs  will continue at their
current levels or that the established goals and objectives will be attained.

     Selling and administrative expenses, which include net advertising expense,
other selling  administrative  expenses and the executive  incentive  bonus pool
declined to 6.5% of net sales in the nine months ended  September  30, 1999 from
6.7% for the same period of 1998.

     Net  advertising  expense  decreased as a percentage  of net sales to 0.62%
from 0.75% for the nine months ended September 30, 1999 and 1998,  respectively.
Gross  advertising   expense  increased  $9.6  million  while  decreasing  as  a
percentage  of net sales in the first nine  months to 2.6% from 3.1% in the same
period of 1998.  The Company  decreased  catalog  circulation  and the number of
national  advertising  pages versus the prior year, while expanding its spending
on its corporate branding campaign and other direct marketing activities.  Based
upon  the  Company's  planned  marketing  initiatives,  future  levels  of gross
advertising  expense as a  percentage  of net sales are likely to be  relatively
consistent  with or higher  than the level  achieved in the first nine months of
1999.  Cooperative  advertising  reimbursements  as a  percentage  of net  sales
declined to 2.0% of net sales in the first nine months of 1999 from 2.3% for the
nine months ended September 30, 1998. The cooperative advertising  reimbursement
rate  may  fluctuate  in  future  quarters  depending  on the  level  of  vendor
participation  achieved,  changes in vendor programs and collection  experience.
The statements concerning future advertising expense and cooperative advertising
reimbursements  are forward  looking  statements  that involve certain risks and
uncertainties  including  the ability to identify and implement  cost  effective
incremental  advertising  and  marketing  programs  as  well  as  the  continued
participation of vendors in the cooperative advertising reimbursement program.

     Other selling and  administrative  costs  decreased to 5.6% of net sales in
the first nine months of 1999 from 5.7% in the same period of 1998. Increases in
coworker  productivity  offset increased payroll and associated costs related to
expansion of the sales force.

                                       13

 16

     In October 1999,  the Company agreed to lease  approximately  72,000 square
feet of office  space in Chicago,  Illinois as an  additional  sales office (see
Working  Capital and Footnote 4 to the  financial  statements).  Average  annual
future  minimum  lease  expense for the new sales office is  approximately  $1.1
million per year.  As a result of the  expansion  of the sales force and the new
sales office the Company's  selling and  administrative  costs may increase as a
percentage of net sales in future periods.

     The executive  incentive  bonus pool increased to $5.7 million in the first
nine  months of 1999 from $2.2  million  in the first nine  months of 1998.  For
1999, the Compensation and Stock Option Committee  established the bonus pool at
15% of the increase in operating income over the prior year.

     Interest  income,  net of other expenses,  decreased to $3.0 million in the
first nine months of 1999  compared to $3.3  million in the first nine months of
1998.

     The effective  income tax rate,  expressed as a percentage of income before
income taxes, was 39.6% for the nine months ended September 30, 1999 and 1998.

     Net income for the nine months ended September 30, 1999, was $68.2 million,
a 43.6%  increase  over $47.5  million for the nine months ended  September  30,
1998.  Diluted  earnings per share was $1.55 for the nine months ended September
30, 1999,  and $1.09 for the same period of 1998, an increase of 42.2%.  All per
share amounts have been adjusted to reflect the two-for-one stock split effected
in the form of a stock dividend paid on May 19, 1999.


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  September  30,  1999,  the  Company  had  cash,  cash  equivalents  and
marketable  securities of $92.8 million and working  capital of $306.8  million,
representing  an  increase  of $22.2  million  in  cash,  cash  equivalents  and
marketable  securities and an increase of $78.1 million in working  capital from
December 31, 1998.

     The Company has an  aggregate  $50  million  available  pursuant to two $25
million  unsecured  lines of credit with two financial  institutions,  one which
expires in June 2000, at which time the Company  intends to renew the line,  and
another which does not have a fixed expiration date.  Borrowings under the first
credit facility 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
September  30,  1999,  there  were no  borrowings  against  either of the credit
facilities.

     The Company plans to expend  between $8 million and $10 million  during the
next twelve months for computer and telecommunication  equipment,  furniture and
improvements related to the new sales office in Chicago, Illinois.

     The Company's current primary and anticipated use of cash is to fund future
growth in working capital and capital  expenditures.  The Company  believes that

                                       14

 17

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 September 30, 2000.

Cash flows for the nine months ended September 30, 1999

     Net  cash  provided  by  operating  activities  for the nine  months  ended
September 30, 1999,  was  $27.7 million.  The primary factors that  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 commercial accounts with open credit terms to 69.5% for the
nine months ended September 30, 1999 from 61.9% for the same period of 1998. The
accounts  receivable  days sales  outstanding  at September 30, 1999 was 32.7 as
compared with 29.0 at December 31, 1998.  Inventory  increased during the period
in response to increased sales volume.  Annualized  inventory turnover increased
to  approximately  28 times for the nine months ended September 30, 1999 from 25
for the nine months ended  September 30, 1998. The increase in accounts  payable
reflects  timing of payments to vendors at the end of the respective  periods as
well as the increase in inventory levels during the year.

     Cash provided by operating  activities for the nine months ended  September
30, 1999,  was  positively  impacted by a $11.7 million tax benefit  recorded to
paid-in-capital,  relating to the  exercise of shares  pursuant to the MPK Stock
Option Plan and the CDW Incentive Stock Option Plan.

     Net cash used in investing  activities for the nine months ended  September
30,  1999,  was $17.2  million,  including  approximately  $7.0 million used for
capital  expenditures.  The  capital  expenditures  made  by  the  Company  were
primarily  related to the purchase of  machinery  and  equipment  for the Vernon
Hills facility.

Year 2000 Readiness Disclosure

General
     The Year 2000  Issue  ("Y2K")  is the  result of  computer  programs  being
written using two digits rather than four to define the applicable  year. Any of
the Company's computer programs that have date-sensitive  software may recognize
a date using "00" as the year 1900  rather  than  2000.  This could  result in a
system failure or miscalculations causing disruptions of operations,  including,
among other things, a temporary  inability to process  transactions,  receive or
ship products, send invoices, or engage in similar normal business activities.

     The Company has established a Y2K project designed to make all its hardware
and software systems Y2K compliant by December 31, 1999.

Project
CDW's Y2K project consists of two components,internal and external. The internal
section has been divided into five steps:
1.   Awareness   -   Awareness  includes  evaluating  industry  best  practices,
     generating management and employee awareness, establishing   communications
     methods and establishing the project team.
2.   Assessment  -  This  phase  includes   hardware  and  software   compliance
     assessment,   establishment   of  the  size  and  scope  of  the   project,
     establishment of a project timeline,  priorities,  budgeting and allocation
     of resources.
3.   Renovation - Renovation consists of establishing a detailed  implementation
     plan, the design of new systems and system  corrections,  writing of system
     code and software and hardware testing.
4.   Validation - Validation includes testing new systems and system corrections
     to ensure they will function  properly in operation.

                                       15

 18

5.   Implementation - Final  certification of  the  new and  corrected  systems,
     implementation  of the  systems and monitoring to  ensure they continue  to
     function.

     Substantially  all phases of the project as they relate to internal systems
were  completed as of March 31, 1999. The Company plans to focus the majority of
its efforts for the  remainder of 1999 on the  external  portion of the project.
The Company  will also test all  its  internal  systems  a second time to ensure
those systems are properly converted.

     The external  portion of the project focuses on assessing the Y2K readiness
of  product  and  service  vendors  and its  potential  impact on the  Company's
operations.  The Company  distributed  questionnaires  to these vendors for this
purpose. To date the Company has received responses from over 30% of the vendors
contacted, each indicating they were not anticipating business disruption due to
Y2K. The Company is working to obtain responses from all significant vendors and
work to resolve  identifiable  issues,  if any, to minimize  potential  business
interruptions.  This portion of the project is expected to be completed prior to
December 31, 1999.

Costs

     The Company  originally  estimated  that total  costs for the Y2K  project,
through December 31, 1999,  would range between $750,000 and $1 million.  Actual
costs  incurred  to date for the Y2K  project  have been lower  than  originally
estimated.  As such,  the Company now estimates that total costs for the project
will range between  $500,000 and $650,000.  As of September 30, 1999 the Company
has  incurred,  and recorded as operating  expenses,  approximately  $370,000 in
costs  related to the  project,  of which  approximately  $130,000  was incurred
during the nine months ended  September 30, 1999. The Company's  expenditures to
date consist  primarily of internal  payroll costs related to the assessment and
correction of internal systems.  Of the estimated remaining costs of $130,000 to
$280,000,  approximately  75% relate to the cost of assessing and  communicating
with vendors and 25% relate to the correction of internal systems.

Risks
     The  failure  to  correct  a  material  Y2K  problem  could  result  in  an
interruption  in,  or a  failure  of,  certain  normal  business  activities  or
operations.  Such failures could  materially and adversely  affect the Company's
results of operations and financial  condition.  Due to the general  uncertainty
inherent in the Y2K problem,  resulting in part from the  uncertainty of the Y2K
readiness of third-party  suppliers,  the Company is unable to determine at this
time whether the consequences of Y2K failures will have a material impact on the
Company's  results of  operations  and  financial  condition.  The Company's Y2K
project is expected to  significantly  reduce the Company's level of uncertainty
about the Y2K problem and, in particular, about the Y2K compliance and readiness
of its material  vendors.  The Company believes that, with the completion of the
project as scheduled,  the  possibility of significant  interruptions  of normal
operations should be minimized.

     The  statements  concerning  future  impact of the Y2K  issue  are  forward
looking  statements  that involve certain risks and  uncertainties,  such as the
inability to receive  products on a timely basis from vendors,  ship products to
customers,  receive payments from customers and other factors which could have a
material impact on the Company's  results from  operations.  Certain vendors may
fail to adequately  prepare their  information  systems or the Company's own Y2K
project may not correct all Y2K issues. Accordingly,  there is no certainty that
the  Company's  vendors will complete  their Y2K projects  prior to December 31,
1999, which if not completed could affect the operations of the Company as noted
above.

     Certain  statements  included in  Management's  Discussion  and Analysis of
Financial  Condition and Results of Operations  concerning  the Company's  sales
growth, gross profit as a percentage of sales, advertising expense,  cooperative
advertising  reimbursements  and the  potential  impact on operations of the Y2K
issue  are   forward-looking   statements   that  involve   certain   risks  and
uncertainties, as specified herein.

                                       16

 19



Part II       Other Information

Item 1.       Legal Proceedings

     The Company is currently not a party to any material legal proceedings.

Item 5.       Other information

     On November 2, 1999 pursuant to unanimous consent of the Company's Board of
     Directors,  the Company  expanded its Board of  Directors to seven  members
     from five,  and elected Casey Cowell and Donald P. Jacobs to fill the newly
     created positions,  effective  immediately. Each new member's term will run
     until the 2000 annual meeting at which time all directors' terms expire.

     Mr. Cowell co-founded U.S. Robotics,  one of the world's leading  suppliers
     of data communications  products and systems. He served as Chairman and CEO
     of U.S. Robotics from inception until its acquisition by 3Com in June 1997.
     Mr. Cowell  is  chairman and principal  owner of  Durandal, Inc., a holding
     company for several diversified private companies, and serves on the  board
     of directors of 3Com. A graduate of the  University  of Chicago, Mr. Cowell
     is a member of the board of trustees for the University of Chicago  and the
     Illinois Institute of Technology.

     Dr. Donald P. Jacobs  is the dean of the J.L.  Kellogg  Graduate  School of
     Management  and has  been a member of the Kellogg faculty since joining the
     school  in 1957.  Dr.  Jacobs serves as chairman of the public review board
     of   Arthur  Andersen  and  serves  on the  board of  directors of  several
     corporations, including Commonwealth Edison, Hartmarx and Terex. Dr. Jacobs
     received his Bachelor of Arts degree from  Roosevelt  University, Master of
     Arts  degree  and Doctorate  in  economics  from  Columbia  University  and
     numerous  honorary  degrees from  prestigious  national  and international
     universities.

Item 6.       Exhibits and Reports on Form 8-K

(a)      Exhibits:

     10 (zz)   Lease  Agreement  Dated  October 11, 1999  between the Company as
               Lessee and Solano Associates as Lessor

     27 (a)    Financial Data Schedule (for the three months ended September 30,
               1999)

(b)      Reports on Form 8-K:

     There were no reports on Form 8-K filed for the three months ended
     September 30, 1999.

                                       17

 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     November 15, 1999               /s/ Harry J. Harczak, Jr.
                      ---------------------           --------------------------
                                                      Harry J. Harczak, Jr.
                                                      Chief Financial  Officer &
                                                      Treasurer

             Date     November 15, 1999               /s/ Sandra M. Rouhselang
                      ---------------------           --------------------------
                                                      Sandra M. Rouhselang
                                                      Controller


                                       18

 21


                                Index to Exhibits

10 (zz)  Lease  Agreement Dated October 11,  1999 between the  Company as Lessee
         and Solano Associates as Lessor
27       Financial Data Schedule