<PAGE>

                         SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C. 20549

                                     FORM 10-Q
                     QUARTERLY REPORT UNDER SECTION 13 OR 15(d)
                       OF THE SECURITIES EXCHANGE ACT OF 1934

                                     (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, 1998

                                         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 000-21561

                         MIAMI COMPUTER SUPPLY CORPORATION
      (Exact name of registrant as specified in its articles of incorporation)


                           OHIO                    31-1001529
             (State or other jurisdiction of    (I.R.S. Employer
              incorporation or organization)   Identification No.)

                  4750 HEMPSTEAD STATION DRIVE, DAYTON, OHIO 45429
                      (Address of principal executive offices)

                                   (937) 291-8282
                (Registrant's telephone number, including area code)

     Indicate by check 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) had been subject to 
such filing requirements for the past 90 days.

                               Yes   X      No
                                   -----       -----

     At November 11, 1998, 11,235,607 shares of common stock, no par value 
per share, of the registrant were outstanding.

<PAGE>

                         MIAMI COMPUTER SUPPLY CORPORATION

                                     FORM 10-Q
                          QUARTER ENDED SEPTEMBER 30, 1998

                                       INDEX

<TABLE>
<CAPTION>
                                                                             PAGE
<S>                                                                          <C>
PART I - FINANCIAL INFORMATION
Item 1.  Financial Statements:
  Consolidated Statement of Operations . . . . . . . . . . . . . . . . . .    3
  Consolidated Balance Sheet . . . . . . . . . . . . . . . . . . . . . . .    4
  Consolidated Statement of Cash Flows . . . . . . . . . . . . . . . . . .    5
  Notes to Consolidated Financial Statements . . . . . . . . . . . . . . .   6-7

Item 2.  Management's Discussion and Analysis of 
  Results of Operations and Financial Condition. . . . . . . . . . . . . .   7-10

PART II - OTHER INFORMATION
Item 1.  Legal Proceedings. . . . . . . . . . . . . . . . . . . . . . . .    11
Item 2.  Changes in Securities. . . . . . . . . . . . . . . . . . . . . .    11
Item 3.  Default Upon Senior Securities.. . . . . . . . . . . . . . . . .    11
Item 4.  Submission of Matters to a Vote of Security Holders. . . . . . .    11
Item 5.  Other Information. . . . . . . . . . . . . . . . . . . . . . . .    11
Item 6.  Exhibits and Reports on Form 8-K . . . . . . . . . . . . . . . .    11
Signatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12

</TABLE>

                                      2
<PAGE>

                           PART I - FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

                         MIAMI COMPUTER SUPPLY CORPORATION

                       CONSOLIDATED STATEMENTS OF OPERATIONS
                                    (UNAUDITED)

<TABLE>
<CAPTION>

                                                                 QUARTER ENDED              NINE MONTHS ENDED
                                                                 SEPTEMBER 30,                SEPTEMBER 30,
                                                                 -------------              -----------------
                                                              1998           1997           1998           1997
                                                         -------------  -------------  -------------  -------------
<S>                                                      <C>            <C>            <C>            <C>
Net sales  . . . . . . . . . . . . . . . . . . . .       $  75,489,583  $  29,001,730  $ 197,797,028  $  71,351,489
Cost of sales. . . . . . . . . . . . . . . . . . .          58,612,237     23,608,006    154,296,662     58,616,014
                                                         -------------  -------------  -------------  -------------

Gross profit . . . . . . . . . . . . . . . . . . .          16,877,346      5,393,724     43,500,366     12,735,475

Selling, general and administrative
  expenses . . . . . . . . . . . . . . . . . . . .          13,394,779      4,364,419     34,660,213     10,121,730
                                                         -------------  -------------  -------------  -------------

Operating income . . . . . . . . . . . . . . . . .           3,482,567      1,029,305      8,840,153      2,613,745
Interest expense . . . . . . . . . . . . . . . . .            (348,369)       (51,385)    (1,592,844)       (75,969)
Other income . . . . . . . . . . . . . . . . . . .              38,582          2,328        117,409         28,921
                                                         -------------  -------------  -------------  -------------

Income before income taxes . . . . . . . . . . . .           3,172,780        980,248      7,364,718      2,566,697
Provision for income taxes . . . . . . . . . . . .           1,387,778        406,803      3,259,574      1,049,315
                                                         -------------  -------------  -------------  -------------

Net income . . . . . . . . . . . . . . . . . . . .       $   1,785,002  $     573,445  $   4,105,144  $   1,517,382
                                                         -------------  -------------  -------------  -------------
                                                         -------------  -------------  -------------  -------------

Earnings per share of common stock-
  basic . . . . . . . .  . . . . . . . . . . . . .       $        0.17  $        0.10  $        0.46  $        0.27
                                                         -------------  -------------  -------------  -------------
                                                         -------------  -------------  -------------  -------------

Earnings per share of common stock-
  diluted. . . . . . . . . . . . . . . . . . . . .       $        0.17  $        0.10  $        0.45  $        0.27
                                                         -------------  -------------  -------------  -------------
                                                         -------------  -------------  -------------  -------------

Weighted average number of common
  shares outstanding-basic . . . . . . . . . . . .          10,553,191      5,893,077      8,925,673      5,538,015
                                                         -------------  -------------  -------------  -------------
                                                         -------------  -------------  -------------  -------------

Weighted average number of common
  shares outstanding-diluted . . . . . . . . . . .          10,788,005      5,923,013      9,129,690      5,570,507
                                                         -------------  -------------  -------------  -------------
                                                         -------------  -------------  -------------  -------------
</TABLE>

The accompanying notes are an integral part of these consolidated financial
                                    statements.

                                      3
<PAGE>

                         MIAMI COMPUTER SUPPLY CORPORATION

                            CONSOLIDATED BALANCE SHEETS
                                    (UNAUDITED)

<TABLE>
<CAPTION>

                                                          SEPTEMBER 30,   DECEMBER 31,
                                                              1998           1997
                                                          -------------   ------------
<S>                                                       <C>             <C>
Assets
Current assets:
  Cash .  . . . . . . . . . . . . . . . . . . . . . . .   $  1,660,721   $  1,662,420
  Accounts receivable . . . . . . . . . . . . . . . . .     48,524,478     21,490,282
  Inventories . . . . . . . . . . . . . . . . . . . . .     30,480,339      9,111,620
  Prepaid expenses. . . . . . . . . . . . . . . . . . .        920,099        314,060
  Deferred income tax assets. . . . . . . . . . . . . .        244,159        275,206
                                                          -------------   ------------
    Total current assets. . . . . . . . . . . . . . . .     81,829,796     32,853,588

Property and equipment - net of accumulated
  depreciation. . . . . . . . . . . . . . . . . . . . .      7,942,414      1,885,131
Other assets:
  Intangible assets . . . . . . . . . . . . . . . . . .     59,122,227     14,408,481
  Other . . . . . . . . . . . . . . . . . . . . . . . .      1,865,891        773,745
                                                          -------------   ------------
     Total assets . . . . . . . . . . . . . . . . . . .   $150,760,328    $49,920,945
                                                          -------------   ------------
                                                          -------------   ------------

Liabilities and Stockholders' Equity
Current liabilities:
  Line-of-credit. . . . . . . . . . . . . . . . . . . .   $               $ 8,040,313
  Notes payable relating to business combinations . . .                     2,791,000
  Accounts payable - trade. . . . . . . . . . . . . . .     23,039,970     11,338,272
  Accrued expenses, taxes and withholdings. . . . . . .      5,925,613      2,440,737
  Current portion of long-term debt . . . . . . . . . .        132,477         55,467
                                                          -------------   ------------
    Total current liabilities . . . . . . . . . . . . .     29,098,060     24,665,789

  Long-term debt. . . . . . . . . . . . . . . . . . . .     32,115,898        112,615
  Deferred income taxes . . . . . . . . . . . . . . . .         83,218        111,644
                                                          -------------   ------------

    Total liabilities . . . . . . . . . . . . . . . . .     61,297,176     24,890,048
                                                          -------------   ------------
Stockholders' equity:
  Preferred stock, no par value, 5,000,000 shares
    authorized; none outstanding at September 30, 1998
    and December 31, 1997 . . . . . . . . . . . . . . .
  Common stock, no par value; 30,000,000 shares
    authorized, 11,209,540 shares outstanding at
    September 30, 1998; 6,621,164 shares outstanding at
    December 31, 1997 . . . . . . . . . . . . . . . . .
  Additional paid-in capital. . . . . . . . . . . . . .     80,074,735     19,095,494
  Retained earnings . . . . . . . . . . . . . . . . . .     10,055,547      5,950,403
  Less - Treasury stock, at cost  . . . . . . . . . . .       (667,130)       (15,000)
                                                          -------------   ------------

    Total stockholders' equity. . . . . . . . . . . . .     89,463,152     25,030,897
                                                          -------------   ------------

    Total liabilities and stockholders' equity. . . . .   $150,760,328    $49,920,945
                                                          -------------   ------------
                                                          -------------   ------------

</TABLE>

    The accompanying notes are an integral part of these consolidated financial
                                    statements.

                                      4
<PAGE>

                         MIAMI COMPUTER SUPPLY CORPORATION

                       CONSOLIDATED STATEMENTS OF CASH FLOWS
                                    (UNAUDITED)

<TABLE>
<CAPTION>

                                                                             NINE MONTHS ENDED
                                                                                SEPTEMBER 30,
                                                                             -----------------
                                                                             1998           1997
                                                                         ------------   ------------
<S>                                                                      <C>            <C>
Cash flows used in operating activities:
  Net income. . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $  4,105,144   $  1,517,382
  Adjustments to reconcile net income to cash used in
    operating activities:
Depreciation and amortization . . . . . . . . . . . . . . . . . . . .       1,556,998        278,739
Changes in assets and liabilities net of effects of acquisitions
  of businesses:
    Accounts receivable . . . . . . . . . . . . . . . . . . . . . . .     (10,430,480)    (3,813,480)
    Inventories . . . . . . . . . . . . . . . . . . . . . . . . . . .      (7,690,687)    (1,548,632) 
    Prepaid expenses and deposits . . . . . . . . . . . . . . . . . .        (461,680)       251,360
    Accounts payable - trade. . . . . . . . . . . . . . . . . . . . .       1,545,912      2,384,705
    Accrued expenses, taxes and withholding . . . . . . . . . . . . .       1,095,094       (158,397)
                                                                         ------------   ------------
    Cash used in operating activities . . . . . . . . . . . . . . . .     (10,279,699)    (1,088,323)
                                                                         ------------   ------------
Cash flows from investing activities:
  Capital expenditures  . . . . . . . . . . . . . . . . . . . . . . .      (3,371,027)      (427,541)
  Investment in other assets. . . . . . . . . . . . . . . . . . . . .        (482,129)      (140,000)
  Business combinations . . . . . . . . . . . . . . . . . . . . . . .     (28,302,984)    (2,485,000)
  Cash included in acquisitions . . . . . . . . . . . . . . . . . . .         529,645         83,657
                                                                         ------------   ------------

Cash used in investing activities . . . . . . . . . . . . . . . . . .     (31,626,495)    (2,968,884)
                                                                         ------------   ------------
Cash flows from financing activities:
  Net proceeds from offering of common stock. . . . . . . . . . . . .      35,928,772
  Net borrowings (payments) under line-of-credit. . . . . . . . . . .      23,859,686      3,553,440
  Increase in long-term debt. . . . . . . . . . . . . . . . . . . . .         236,428
  Principal payments on long-term debt. . . . . . . . . . . . . . . .        (170,978)       (27,238)
  Payment of debt acquired in business combinations . . . . . . . . .     (14,676,350)
  Purchase of treasury shares, net of issuance. . . . . . . . . . . .      (3,273,063)
  Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              --        (82,899)
                                                                         ------------   ------------

Cash provided by financing activities . . . . . . . . . . . . . . . .      41,904,495      3,443,303
                                                                         ------------   ------------

Net decrease in cash. . . . . . . . . . . . . . . . . . . . . . . . .          (1,699)      (613,904)
  Cash - beginning of period. . . . . . . . . . . . . . . . . . . . .       1,662,420        780,875
                                                                         ------------   ------------

Cash - end of period  . . . . . . . . . . . . . . . . . . . . . . . .    $  1,660,721   $    166,971
                                                                         ------------   ------------
                                                                         ------------   ------------
Supplemental cash flow information:
  Cash paid for interest. . . . . . . . . . . . . . . . . . . . . . .    $  1,452,456   $     76,456
  Cash paid for income taxes. . . . . . . . . . . . . . . . . . . . .       2,989,688        935,358
  Common stock issued in business combinations. . . . . . . . . . . .      27,386,398     10,746,245

</TABLE>

    The accompanying notes are an integral part of these consolidated financial
                                    statements.

                                      5
<PAGE>

                         MIAMI COMPUTER SUPPLY CORPORATION

                     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                     (UNAUDITED)

NOTE 1 - GENERAL

     The accompanying unaudited consolidated financial statements have been 
prepared in accordance with the instructions and requirements of Form 10-Q. 
Consequently, they do not include all the disclosures required under 
generally accepted accounting principles for complete financial statements.  
However, in the opinion of the management of Miami Computer Supply 
Corporation (the "Company"), the consolidated financial statements presented 
herein contain all adjustments (consisting only of normal recurring 
adjustments) necessary to present fairly the financial position, results of 
operations and cash flows of the Company and its consolidated subsidiaries.  
The results of operations for the period ended September 30, 1998 are not 
necessarily indicative of the results that may be expected for the entire 
fiscal year or any other interim period.  For further information regarding 
the Company's accounting policies and the basis of presentation of the 
financial statements, refer to the consolidated financial statements and 
notes included in the Company's Annual Report on Form 10-K for the year ended 
December 31, 1997.

NOTE 2 - COMMON STOCK

     On March 26, 1998, the Company declared a three for two stock split on 
its common stock, which was payable on April 24, 1998.  All share and per 
share data contained herein has been restated to reflect the stock split.

     On June 30, 1998, the Company completed a public stock offering 
("Offering") for 2,100,000 shares of its common stock.  Proceeds from the 
Offering were $16.00 per share less the underwriting discount and related 
offering expenses.  The Offering closed on July 6, 1998.  On July 23, 1998, in 
connection with the Offering, the underwriters overallotment of 315,000 
shares were sold at $16.00 per share less the underwriting discount.

     In September 1998, the Board of Directors authorized the repurchase of up 
to 5.0% of the outstanding shares of common stock of the Company through 
open-market repurchases and privately negotiated purchases, if any, from time 
to time when deemed appropriate by management.

NOTE 3 - ACQUISITIONS

     The Company is engaged in an active acquisition program.  From April 
1997 through December 1997, the Company acquired the stock or assets of six 
(6) separate entities:  Imperial Data Supply Corporation ("IDS"), Data 
Associates, Inc. ("DA"), Force 4 Data Products, Inc. ("Force 4"), NTI Data 
Products, Inc. ("NTI"), Britco, Inc. ("Britco"), and TBS Printware, Inc. 
("TBS"), all in purchase business combinations.  None of the acquired 
entities, each of which is engaged in providing computer supply products, 
were individually significant to the Company's consolidated financial 
statements.  Earnings of each of the acquired entities, have been recorded by 
the Company beginning with the respective acquisition dates.  The aggregate 
purchase price of the acquired entities which totaled $17,821,903, was 
comprised of cash, 1,314,164 shares of the Company's common stock with a fair 
value of $10,746,245, notes payable due to sellers aggregating $2,791,000 due 
in January, 1998, and related out of pocket expenses totaling $787,158.  One 
acquisition calls for contingent consideration of  up to $2,200,000 if 
certain operating results occur within the thirty-three month period 
following the acquisition.   The acquisition price has been allocated to the 
estimated fair value of the assets acquired and the liabilities assumed, with 
the residual being allocated to intangible assets (goodwill) which is being 
amortized over a forty year life. 

     Effective January 1, 1998, the Company completed its acquisition of 
Minnesota Western/Creative Office Products, Inc. ("MW") in a purchase 
business combination.  MW is engaged in designing, selling and distributing 
audio visual equipment and supplies.  The purchase price totaled $24,664,311 
and was comprised of cash, 1,322,555 shares of the Company's common stock 
with a fair value of $12,343,842 and related out of pocket expenses totaling 
$320,469.  The purchase price was allocated to the estimated fair values of 
the assets acquired and liabilities assumed with the residual being allocated 
to intangible assets (goodwill) which is being amortized over a forty year 
life.

     Effective March 1, 1998 and June 1, 1998, the Company completed its 
acquisitions of Computer Showcase, Inc. ("CS") and Electronic Image Systems, 
Inc. ("EIS") in purchase business combinations.  CS is a distributor of 
visual presentation systems and products and EIS is a distributor and 
integrator of presentation systems.  The acquisitions were not significant to 
the Company's consolidated financial statements.

     Effective September 1, 1998, the Company completed the acquisition of 
Consolidated Media Systems, Inc. ("CMS") in a business purchase combination. 
CMS is a distributor of business and professional audio-video products.  The 
purchase price was comprised of $10,246,500 in cash, and 632,586 shares of the 
Company's common stock with a fair value of $10,453,500. The purchase price was 
allocated to the estimated fair values of the assets acquired and liabilities
assumed with the residual being allocated to intangible assets (goodwill) which
is being amortized over a forty year life.

                                      6
<PAGE>

     The following pro forma data reflects the impact of the foregoing 
business combinations as if they had occurred on the first day of each period 
indicated.

<TABLE>
<CAPTION>
                                                           3 Months Ended               9 Months Ended
                                                           September 30,                 September 30,
                                                       1998           1997           1998           1997
                                                       ----           ----           ----           ----
   <S>                                            <C>            <C>            <C>            <C>
   Net sales . . . . . . . . . . . . . . . .      $  92,051,599  $  72,687,529  $ 253,716,805  $ 212,490,154
   Net income. . . . . . . . . . . . . . . .          1,893,261        181,318      4,220,926      1,933,690
   Earnings per share of common stock
     basic . . . . . . . . . . . . . . . . .                .18            .02            .44            .22
   Earnings per share of common stock
     diluted . . . . . . . . . . . . . . . .                .17            .02            .43            .21

</TABLE>

     Effective September 25, 1998, the Company completed its acquisition of 
Optical Express Computer Supplies, Inc., ("Optical Express") in a purchase 
business combination.  Optical Express is a distributor of computer and data 
storage supplies in Minneapolis, Minnesota.  This acquisition was not 
significant to the Company's financial statements.

NOTE 4 - LONG TERM DEBT

     As disclosed in the Company's consolidated financial statements included 
in its Annual Report on Form 10-K for the year ended December 31, 1997, in 
January 1998, the Company entered into a new $50 million borrowing 
arrangement permitting the Company to borrow funds for a three year period.  
Accordingly, borrowings under the arrangement at September 30, 1998 have been 
classified as long-term debt.  

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND
        FINANCIAL CONDITION

GENERAL
     The following discussion should be read in conjunction with the 
information contained in the unaudited Consolidated Financial Statements and 
Notes to Consolidated Financial Statements. The following information 
contains "forward-looking statements" within the meaning of the Private 
Securities Litigation Reform Act of 1995 (the "Act") and is subject to the 
safe harbor created by that Act. The words "estimate," "project," 
"anticipate," "expect," "intend," "believe," "plans" and similar expressions 
are intended to identify forward-looking statements. Because such 
forward-looking statements involve risks and uncertainties, there are 
important factors that could cause actual results to differ materially from 
those expressed or implied by such forward-looking statements. Factors that 
could cause actual results to differ materially include, but are not limited 
to, changes in general economic and business conditions, the availability of 
capital on acceptable terms, actions of competitors, and changes in business 
strategies and other factors as discussed in Exhibit 99.

     The Company intends to continue its aggressive acquisition strategy of 
entering new markets domestically and internationally on an opportunistic 
basis, to acquire computer and office automation supply and presentation 
products distribution companies and to hire certain experienced sales 
representatives in and outside of the Company's current market areas, some of 
whom may be constrained from working in their present locations for a period 
of time.  The Company actively continues to evaluate other potential 
acquisitions and to identify and have preliminary discussions and 
negotiations with potential acquisition candidates. There can be no assurance 
that any acquisition can or will be consummated on terms favorable to the 
Company (or at all), or that the Company will not need additional debt or 
equity financing to continue its acquisition strategy.

THREE MONTHS ENDED SEPTEMBER 30, 1998 COMPARED TO THREE MONTHS ENDED 
SEPTEMBER 30, 1997

     NET SALES. Net sales for the three months ended September 30, 1998 
increased by $46.5 million, or 160.3%, to $75.5 million from $29.0 million 
for the three months ended September 30, 1997.  Of the increase, sales to the 
Company's core customer base increased 19.5%; the balance of the increase 
resulted from acquisitions.

     GROSS PROFIT. Gross profit for the three months ended September 30, 1998 
increased by $11.5 million, or 212.9% to $16.9 million from $5.4 million for 
the three months ended September 30, 1997.  Gross profit as a percentage of 
net sales for the three months ended September 30, 1998 was 22.4% compared 
to18.6% for the three months ended September 30, 1997. The increase in the 
gross profit percentage was due primarily to the result of the higher margins 
of MW, which was acquired effective January 1, 1998.

     SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and 
administrative expenses for the three months ended September 30, 1998 
increased by $9.0 million, to $13.4 million from $4.4 million for the three 
months ended September 30, 1997.  The majority of the increase resulted from 
acquisitions the Company has completed since September 30, 1997.  As a 
percentage of net sales, selling, general and administrative expenses were 
17.7% for the three months ended September 30, 1998 compared to 15.0% for the 
three months 

                                      7
<PAGE>

ended September 30, 1997. This increase as a percentage of sales is due 
primarily from the results of  MW, which has a higher selling, general and 
administrative expense percentage, while maintaining a higher gross profit 
percentage.

     OPERATING INCOME. Operating income for the three months ended September 
30, 1998 increased by $2.5 million to $3.5 million from $1.0 million for the 
three months ended September 30, 1997 for the reasons stated above.  
Operating margin increased to 4.6% for the three months ended September 30, 
1998 compared to 3.5% for the three months ended September 30, 1997.

     INTEREST EXPENSE. Interest expense for the three months ended September 
30, 1998 increased by $296,984 to $348,369 from $51,385 for the three months 
ended September 30, 1997 due primarily to the increased level of indebtedness 
during 1998, utilized to fund business combinations and the growth in working 
capital. Proceeds from the June 30, 1998 stock offering were used to reduce 
the outstanding debt at that date.

     PROVISION FOR INCOME TAXES. The provision for income taxes for the three 
months ended September 30, 1998 increased $980,975 to $1,387,778 from 
$406,803 for the three months ended September 30, 1997.  The Company's 
effective tax rate was 43.7% for the three months ended September 30, 1998 
and 41.5% for the three months ended September 30, 1997.  Increased 
amortization of goodwill, most of which was not deductible for tax purposes, 
was the reason for the higher tax rate during the 1998 three month period.

NINE MONTHS ENDED SEPTEMBER 30, 1998 COMPARED TO NINE MONTHS ENDED SEPTEMBER 
30, 1997

NET SALES. Net sales for the nine months ended September 30, 1998 increased 
by $126.4 million, or 177.0%, to $197.8 million from $71.4 million for the 
nine months ended September 30, 1997.  Of the increase, sales to the 
Company's core customer base increased 18.7%; the balance of the increase 
resulted from acquisitions.  

GROSS PROFIT. Gross profit for the nine months ended September 30, 1998 
increased by $30.8 million, or 242.6% to $43.5 million from $12.7 million for 
the nine months ended September 30, 1997.  Gross profit as a percentage of 
net sales for the nine months ended September 30, 1998 was 22.0% compared to 
17.8% for the nine months ended September 30, 1997.  The increase in the 
gross profit percentage was due primarily to the result of the higher margins 
of MW, which was acquired effective January 1, 1998.

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and 
administrative expenses for the nine months ended September 30, 1998 
increased by $24.5 million, to $34.7 million from $10.2 million for the nine 
months ended September 30, 1997.  The majority of the increase resulted from 
acquisitions the Company has completed since September 30, 1997.   As a 
percentage of net sales, selling, general and administrative expenses were 
17.5% for the nine months ended September 30, 1998 compared to 14.2% for the 
nine months ended September 30, 1997. This increase as a percentage of sales 
is due primarily from the results of MW, which has a higher selling, general 
and administrative expense percentage, while maintaining  a higher gross 
profit percentage.

OPERATING INCOME. Operating income for the nine months ended September 30, 
1998 increased by $6.2 million to $8.8 million from $2.6 million for the nine 
months ended September 30, 1997, for the reasons stated above.   Operating 
margins were 4.5% for the nine months ended September 30, 1998 compared to 
3.7% for the nine months ended September 30, 1997.

INTEREST EXPENSE. Interest expense for the nine months ended September 30, 
1998 increased to $1,592,844 from $75,969 for the nine months ended September 
30, 1997 due primarily to the increased level of indebtedness during 1998, 
which was used for business combinations and working capital.

PROVISION FOR INCOME TAXES. The provision for income taxes for the nine 
months ended September 30, 1998 increased $2.3 million to $3.3 million from 
$1.0 million for the nine months ended September 30, 1997.  The Company's 
effective tax rate was 44.3% for the nine months ended September 30, 1998 as 
compared to 40.9% for the corresponding period of the prior year.  Increased 
amortization of goodwill, most of which was not deductible for tax purposes, 
was the reason for the higher tax rate during the 1998 nine month period.

LIQUIDITY AND CAPITAL RESOURCES

     Net cash flows used in operating activities totaled $10.3 million for 
the first nine months of 1998 compared to $1.1 million used by operating 
activities during the first nine months of 1997. The change in net cash flows 
from operating activities was due primarily to an increase in accounts 
receivable and inventory and to support business growth.

     Net cash used in investing activities was $31.6 million for the nine 
months ended September 30, 1998 versus $3.0 million for the nine months ended 
September 30, 1997.  The net cash used in investing activities primarily 
reflects the acquisitions completed during the period.  Net cash provided by 
financing activities totaled $41.9 million for the nine months ended 
September 30, 1998 compared with $3.4 million for the nine months ended 
September 30, 1997. This increase was due to the June 30, 1998 stock 
offering, the proceeds of which were used to repay borrowings in the third 
quarter.

                                      8
<PAGE>

     Capital expenditures for the nine months ended September 30, 1998 
totaled $3.4 million and were used primarily to upgrade the Company's 
management information systems. 

     The Company believes that its cash on hand and borrowing capacity under 
the Credit Facility (see below) will be sufficient to fund its ongoing 
operations and budgeted capital expenditures for the next twelve months, 
although actual capital needs may change, particularly in connection with 
acquisitions which the Company may make in the future. The Company's 
long-term requirements, including capital expenditures and acquisitions, are 
expected to be financed by a combination of additional borrowings and other 
sources of external financing as needed.

CREDIT FACILITY

     On January 8, 1998, the Company revised its Credit Facility.  The new 
Credit Facility is a $50.0 million secured revolving credit facility provided 
by National City Bank, Dayton, Ohio (the "Bank") and two other banks.  The 
Credit Facility contains restrictive covenants which include, among other 
restrictions: (i) the maintenance of certain financial ratios; (ii) 
restrictions on ( a ) the purchase or sale of assets, ( b ) any merger, sale 
or consolidation activity, ( c ) loans, investments and guarantees made by 
the Company, ( d ) lease, sale and leaseback transactions, and ( e ) capital 
expenditures; and (iii) certain limitations on the incurrence of other 
indebtedness; and (iv) the prohibition of the payment of cash dividends and 
the repurchase of the Company's stock which restriction was waived in 
connection with the Company's stock repurchase program and the Company's 
Employee Payroll Deduction Stock Purchase Plan.

     Loans may be made at the Bank's prime rate (the "Prime Rate") or at the 
defined published eurodollar rate plus a "eurodollar margin" which ranges 
from 150 to 225 basis points ("Applicable Eurodollar Margin") based on the 
Company's ratio of consolidated total indebtedness to consolidated earnings 
before interest, taxes, depreciation and amortization (the "Debt/EBITDA 
Ratio") ranging from greater than  2.75:1 (for which the Applicable 
Eurodollar Margin would be the highest) to less than 2.0:1 (for which the 
Applicable Eurodollar Margin would be the lowest).  In addition, the Company 
has agreed to pay a commitment fee ranging from 20.0 to 37.5 basis points per 
annum, depending upon the Company's EBITDA Ratio and a letter of credit fee 
equal to the Applicable Eurodollar Margin then in effect, plus a facing fee 
of 1/8 of 1% per annum on the credit amount.

     The indebtedness under the Credit Facility is secured by substantially 
all of the assets of the Company, including accounts receivable, equipment 
and inventory. In addition, the Credit Facility requires that the Company 
maintain as of September 30, 1998 a net worth of $17.7 million and thereafter 
increasing by an amount equal to 50.0% of the Company's net income and 90% of 
stock issued beginning with the fourth quarter of 1997, maintain the ratio of 
total indebtedness to earnings before interest, taxes, depreciation and 
amortization below 3.75, and maintain a fixed charge coverage ratio of at 
least 1.40.  The Credit Facility also contains certain other covenants.  The 
Company was, at September 30, 1998 and is, as of the date hereof, in 
compliance with all covenants.

     Loans under the Credit Facility have a maturity date of December 29, 
2000. All borrowings under the Credit Facility are classified as long-term 
debt.

YEAR 2000

1) THE RISKS AND THE COMPANY'S STATE OF READINESS:
     The Company is aware of the issues associated with the hardware, 
software and operating systems in existing computer and telecommunication 
systems as the millennium approaches.  The "year 2000" problem is pervasive 
and complex as virtually every computer operation will be affected in some 
way by the rollover of the two digit year value to 00.  The issue is whether 
computer and other computer operated systems will properly recognize 
date-sensitive information when the year changes to 2000.  Systems that do 
not properly recognize such information could generate erroneous data or 
cause a system to fail.

     The Company is utilizing internal and external resources to identify and 
correct, or reprogram, all systems for year 2000 compliance.  The Company's 
AS/400 hardware and operating system are already compliant.  The Company is 
in the process of implementing a corporate wide financial and distribution 
software package from J. D. Edwards Company in response to the Company's 
expansion and acquisition program.  This software package is already year 
2000 compliant, and installation is expected to be complete January 1, 1999. 
Implementation of the J.D. Edwards Company software package is on schedule 
for the January 1, 1999 installation.  The Company's subsidiaries will be 
converted to this software package during the first six months of 1999.

     All other equipment is currently undergoing compliance testing.  In 
cases of non-compliance, equipment will be replaced by January 1, 1999.  This 
equipment includes PCs, networking equipment, telecommunication equipment, 
phone and alarm systems.

     The Company has not completed an assessment of third party readiness.  
The Company regularly carries products and accessories manufactured by over 
500 original equipment manufacturers.  Approximately 54.3% of the Company's 
net sales for the nine 

                                      9
<PAGE>

months ended September 30, 1998 were provided by its key suppliers.  The 
Company intends to obtain written assurance from these suppliers that they 
expect to be Year 2000 compliant on a timely basis.  Should a significant 
number of the Company's suppliers not be Year 2000 compliant, the Company 
might not  be able to supply its customers with product on a timely basis.  
Such a disruption could have a material adverse affect on the Company's 
operation and financial performance.  The Company expects to complete its 
evaluation of third party readiness during the first quarter of 1999.

2) THE COSTS TO ADDRESS THE COMPANY'S YEAR 2000 ISSUES:
     The cost of year 2000 compliance and J.D. Edwards conversion to date has 
approximated $1.5 million.  The cost to bring the Company into compliance and 
convert its financial and distribution systems to the J. D. Edwards system is 
currently estimated to be approximately $4.8 million. 

3) THE COMPANY'S CONTINGENCY PLANS:
     The Company is continuing to develop contingency plans as needed in the 
future.

                                      10
<PAGE>

                             PART II-OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS
     The Company is, from time to time, involved in litigation in the 
ordinary course of its business.  As of the date of this Form 10-Q, 
management does not believe that such litigation is material.

ITEM 2.  CHANGES IN SECURITIES AND USE OF PROCEEDS
     On April 30, 1997, the Company purchased certain specified assets and
assumed certain liabilities of Imperial Data Supply Corporation, a Washington
Corporation ("IDSC"). The Company issued 106,383 shares of its Common Stock to
John Keegan, the President and a stockholder of IDSC, Valerie Keegan, the wife
of John Keegan a stockholder of IDSC, Melva Potter, a stockholder of IDSC and
the William H. Potter Testamentary Trust, also a stockholder of IDSC, as a
portion of the consideration paid for said assets.

     On July 1, 1997, the Company acquired Force 4 D.P. Supplies, Inc., an
Oregon corporation ("Force 4"), by means of Force 4's merger with and into MCSC
Oregon Acquisition Corporation, a subsidiary of the Company organized in Oregon.
The Company issued 129,730 shares of its Common Stock to Daniel W. Wisdom,
President and sole stockholder of Force 4, as a portion of the consideration
paid for 100% of the issued and outstanding common stock of Force 4.

     On July 15, 1997, the Company acquired Data Associates, Inc., a Georgia
corporation ("Data"), by means of Data's merger with and into MCSC Georgia
Acquisition Corporation, a subsidiary of the Company organized in Georgia. The
Company issued 154,996 shares of its Common Stock to Gerald G. Gould, President
and 50.1% stockholder of Data, and J. Philip Crone, Vice President and 49.9%
stockholder of Data, as a portion of the consideration paid for 100% of the
issued and outstanding common stock of Data.

     On October 8, 1997, the Company acquired NTI Data Products, Inc. a New
Hampshire corporation ("NTI"), by means of NTI's merger with and into MCSC New
Hampshire Acquisition Corporation, a subsidiary of the Company organized in New
Hampshire. The Company issued 137,501 shares of its Common Stock to Thomas R.
James, President and a stockholder of NTI, and Stephen M. Mulloy, Vice President
and a stockholder of NTI, as a portion of the consideration paid for 100.0% of
the issued and outstanding common stock of NTI.

     On December 5, 1997, the Company acquired Britco, Inc., a Texas corporation
("Britco"), by means of Britco's merger with and into MCSC Texas Acquisition
Corporation, a subsidiary of the Company organized in Texas. The Company issued
275,000 shares of its Common Stock to Gretchen K. Ferguson, the President and a
stockholder of Britco, and Charles L. Ferguson, the Vice President and a
stockholder of Britco, as a portion of the consideration paid for 100.0% of the
issued and outstanding common stock of Britco.

     On December 31, 1997, the Company acquired TBS Printware Corporation, a
California corporation ("TBS"), by means of TBS's merger with and into MCSC
Fremont Acquisition Corporation, a subsidiary of the Company organized in
California. The Company issued 315,000 shares of its Common Stock to Robert
Salomon, a director, the Chief Executive Officer and a stockholder of TBS, John
McCoubrie, a director, the President and a stockholder of TBS and Lothar Rowe, a
director and a stockholder of TBS as a portion of the consideration paid for
100.0% of the issued and outstanding common stock of TBS.

     On January 15, 1998, the Company acquired Minnesota Western/Creative Office
Products, Inc., a California corporation ("MW"), by means of MW's merger with
and into MCSC California Acquisition Corporation, a subsidiary of the Company
organized in California. The Company issued 1,322,555 shares of its Common Stock
to H. Clark Gilson, a director, the President and a stockholder of MW,
individually and together with Kay A. Gilson, his spouse, as Trustees of the
Gilson Trust, dated November 5, 1993, Ruy J. Pereira, a director, a Vice
President and a stockholder of MW, individually and as Trustee of the Pereira
Trust, dated November 12, 1992, Mr. Larry R. Goodman, a director, a Vice
President and a stockholder of MW, individually and together with Linda D.
Goodman, his spouse, as Trustees of the Goodman Trust, dated February 7, 1994,
as a portion of the consideration paid for 100.0% of the issued and outstanding
common stock of MW.

     On March 3, 1998, the Company acquired Computer Showcase, Inc., a Georgia
corporation ("CSI"), by means of CSI's merger with and into MCSC Bulldog
Acquisition Corporation, a subsidiary of the Company organized in Georgia. The
Company issued 180,269 shares of its Common Stock to Deborah Smith, a director,
the President and a stockholder of CSI and Jerrold H. Smith, a director, the
Vice President and a stockholder of CSI, as a portion of the consideration paid
for 100.0% of the issued and outstanding common stock of CSI.

     On June 15, 1998, the Company acquired Electronic Image Systems, Inc., a
Washington corporation ("EIS"), by means of EIS's merger with and into MCSC
Cougar Acquisition Corporation, a subsidiary of the Company organized in
Washington. The Company issued 132,136 shares of its Common Stock to Michael C.
Richardson, a director, the Chief Executive Officer, Secretary, and Vice
President and a stockholder of EIS and Michael A. Clark, a director, the
President and a stockholder of EIS, as a portion of the consideration paid for
100% of the issued and outstanding common stock of EIS.

     On September 11, 1998, the Company acquired Consolidated Media Systems, 
Inc., a Tennessee Corporation, by means of CMS' merger with and into MCSC 
Tennessee Acquisition Corporation, a subsidiary of the Company organized in 
Tennessee.  The Company issued 632,586 shares of its Common Stock to Donald 
W. Sandlin, President and a stockholder of CMS, John W. Miles, 
Secretary-Treasurer and a stockholder of CMS, and John D. Lentz, board member 
and a stockholder of CMS, as a portion of the consideration paid for 100% of 
the issued and outstanding common stock of CMS.

     On September 25, 1998, the Company acquired Optical Express, Inc., a 
Minnesota Corporation ("Optical") by means of Optical's merger with and into 
MCSC.  The Company issued 39,966 shares of its Common Stock to Warren Michael 
Adams, President and a stockholder of Optical, Michael G. Brown, 
Vice-President of Marketing and a stockholder of Optical, and Thomas R. 
Murphy, Sales Manager and a stockholder of Optical, as a portion of the 
consideration paid for said assets.

     Each of the foregoing transactions was exempt from the registration 
requirements of the Securities Act under Section 4(2) therof and Rule 506 of 
Regulation D of the General Rules and Regulations promulgated thereunder 
("Regulation D").  the securities in each of the foregoing acquisitions were 
privately placed with individuals, who represented their status as accredited 
investors as that term is defined in Rule 501(a) of Regulation D.

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES
     Not applicable.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
     Not applicable.

ITEM 5.  OTHER INFORMATION
     Not applicable.

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K
(a)  Exhibits

<TABLE>
<CAPTION>

Exhibit No.                         Exhibit Description
--------------------------------------------------------------------------------
<S>            <C>
    3.1        Amended and Restated Articles of Incorporation of Miami Computer
               Supply Corporation.(1)
 
    3.2        Amended and Restated Code of Regulations of Miami Computer Supply
               Corporation.(1)
 
    4.0        Form of Stock Certificate of Miami Computer Supply
               Corporation.(1)
 
   10.1        Lease by and between Draft Partnership and Miami Computer Supply,
               Inc. dated October 26, 1995.(1)
 
   10.2        Lease by and between John Schwarz, Sr., Marcella Schwarz, John
               and Robert T. Schwarz and Miami Computer Supply, Inc., dated June
               30, 1994.(1)
 
   10.3        Miami Computer Supply, Inc. Profit Sharing Plan.(1)
 
   10.4        Miami Computer Supply, Inc. Section 125C Cafeteria Plan.(1)
 
   10.5        Credit Facility between Miami Computer Supply, Inc. and National
               City Bank, as Administrative Agent, and the Named Lending
               Institutions, dated January 8, 1998.(2)
 
   10.5.1      Amendment No. 1 to Credit Facility dated February 13, 1998.(2)
 
   10.5.2      Amendment No. 2 to the Credit Facility dated May 15, 1998.(3)
 
   10.6        Epson Authorized Reseller Agreement dated June 28, 1995.(1)
 
   10.7        Proxima Reseller Agreement dated May 29, 1996.(1)
 
   10.8        Hewlett Packard U.S. Reseller Channel Agreement as amended
               January 1, 1996.(1)
 
   10.9        Lexmark Dealer Agreement dated November 1986.(1)
 
   10.10       3M Authorized Distributor Agreement dated January 27, 1987.(1)
 
   10.11       Employment Agreement by and between Miami Computer Supply, Inc.,
               and Thomas C. Winstel dated May 30, 1996.(1)
 
   10.12       Employment Agreement by and between Miami Computer Supply, Inc.
               and Richard A. Newkold dated May 30, 1996.(1)
 
   10.13       Employment Agreement by and between Miami Computer Supply, Inc.
               and Roger E. Turvy dated May 30, 1996.(1)
 
   10.14       Employment Agreement by and between Miami Computer Supply, Inc.
               and Michael E. Peppel dated May 30, 1996.(1)
 
   10.15       Employment Agreement by and between Miami Computer Supply, Inc.
               and John C. Huffman III dated May 30, 1996.(1)
 
   10.16       Split Dollar Agreement by and between Miami Computer Supply, Inc.
               and Thomas C. Winstel dated December 1, 1995.(1)
 
   10.17       Split Dollar Agreement by and between Miami Computer Supply, Inc.
               and Richard A. Newkold dated December 1, 1995.(1)
 
   10.18       Split Dollar Agreement by and between Miami Computer Supply, Inc.
               and Roger E. Turvy dated December 1, 1995.(1)
 
   10.19       Miami Computer Supply Corporation 1996 Stock Option Plan.(1)
 
   10.20       Miami Computer Supply Corporation Non-employee Director Stock
               Option Plan.(1)

   10.21       Severance Agreement for Albert L. Schwarz dated December 23, 
               1997.(4)

   10.22       Miami Computer Supply Corporation 1998 Employee Payroll Deduction
               Stock Purchase Plan.(3)
 
   10.23       Miami Computer Supply 1998 Stock Option Plan.(3)
 
   10.24       Agreement and Plan of Reorganization by and between Miami
               Computer Supply Corporation, MCSC Texas Acquisition Corporation,
               Britco, Inc., Gretchen K. Ferguson and Charles L. Ferguson dated
               November 26, 1997.(5)
 
   10.25       Agreement and Plan of Reorganization by and among Miami Computer
               Supply Corporation, MCSC California Acquisition Corporation,
               Minnesota Western/Creative Office Products, Inc. and the Named
               Stockholders dated November 21, 1997.(6)
 
   10.26       Agreement and Plan of Reorganization by and among Miami Computer
               Supply Corporation, MCSC Fremont Acquisition Corporation, TBS
               Printware Corporation and the Named Stockholders dated December
               23, 1997.(7)
  
   10.27       Lease Agreement by and between 921 Parker Street, a California
               General Partnership, and Minnesota Western/Creative Office
               Products, Inc. dated July, 1994.(3)
 
   10.28       Lease Agreement by and between 180 S. Prospect Partners and
               Minnesota Western/Creative Office Products, Inc. dated August 26,
               1996.(3)

   10.29       Agreement and Plan of Reorganization by and among Miami Computer
               Supply Corporation, MCSC Tennessee Acquisition Corporation,
               Consolidated Media Systems, Inc. and the Named Stockholders,
               dated July 16, 1998.(8)

   27.0        Financial Data Schedule.

   99.0        Safe Harbor Under the Private Securities Litigation Reform Act of
               1995.
</TABLE>
------------------------
(1)  Incorporated by reference from the Company's Registration Statement on Form
     S-1 as filed with the Commission on November 11, 1996, SEC File No. 
     333-12689.
 
(2)  Incorporated by reference from the Company's Registration Statement on Form
     S-3 as filed with the Commission on March 5, 1998, SEC File No. 333-36299.

(3)  Incorporated by reference from the Company's Registration Statement on Form
     S-1 filed with the Commission on May 27, 1998, as amended, SEC File No.
     333-53639.
 
(4)  Incorporated by reference from the Company's Form 8-K as filed with the
     Commission on January 2, 1998.
 
(5)  Incorporated by reference from the Company's Current Report on Form 8-K as
     filed with the Commission on December 15, 1997.
 
(6)  Incorporated by reference from the Company's Current Report on Form 8-K as
     filed with the Commission on January 30, 1998.
 
(7)  Incorporated by reference from the Company's Current Report on Form 8-K as
     filed with the Commission on February 12, 1998.

(8)  Incorporated by reference from the Company's Current Report on Form 8-K as
     filed with the Commission on September 23, 1998.

(b)  Reports on Form 8-K

     Report on Form 8-K, Item 5--Other Events, regarding the Company's Stock 
     Repurchase Plan filed with the Securities and Exchange Commission on 
     September 17, 1998.

     Report on Form 8-K, Item 2--Acquisition or Disposition of Assets and Item 7
     Financial Statements And Exhibits, Regarding the Company's acquisition of 
     Consolidated Media Systems, Inc. filed with the Securities and Exchange 
     Commission on September 23, 1998. This form 8-K includes the following 
     financial statements and pro forma data: unaudited financial statements of 
     CMS as of June 30, 1998 and for the six months ended June 30, 1998 and 
     1997, and the audited financial statements of CMS as of December 31, 1997 
     and 1996 and for each of the three years in the period ended December 31, 
     1997; unaudited proforma financial information of the Company reflecting 
     the CMS acquisition as of June 30, 1998 and for the six months ended June 
     30, 1998 and for the year ended December 31, 1997.

(c)  Prospectus 

     Report on Prospectus, regarding secondary offering of additional shares 
filed with the Securities and Exchange Commission on July 1, 1998.

                                      11
<PAGE>

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.

                         MIAMI COMPUTER SUPPLY CORPORATION
                                    (Registrant)

Date:  November 16, 1998

                     By:/s/ Ira H. Stanley
                        Ira H. Stanley
                        Vice President, Chief Financial Officer

                                      12