QUICKTURN DESIGN SYSTEMS INC
10-Q, 1998-11-13
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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<PAGE>

                                  UNITED STATES
                       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, 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 : 0-22738

                         QUICKTURN DESIGN SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)

                  DELAWARE                              77-0159619
    (State or other jurisdiction of                  (I.R.S. Employer
     incorporation or organization)                  Identification No.)

                55 W. Trimble Road, San Jose, California 95131
             (Address of principal executive offices) (zip code)

       Registrant's telephone number, including area code: (408) 914-6000

                                   NO CHANGE
         -------------------------------------------------------------
         (Former name or former address, 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 [ ]

As of October 31, 1998 there were 18,077,059 shares of the registrant's common
stock outstanding.

This quarterly report on Form 10-Q contains 26 pages, of which this is page 1.


<PAGE>

PART I. FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

                         QUICKTURN DESIGN SYSTEMS, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                  (AMOUNTS IN THOUSANDS EXCEPT PER SHARE DATA)
                                   (UNAUDITED)
<TABLE>
<CAPTION>
                                                Three Months Ended       Nine Months Ended
                                                   September 30,          September 30,
                                                -------------------      ------------------
                                                  1998        1997        1998        1997
                                                -------     --------    --------    --------
<S>                                             <C>         <C>         <C>         <C>
Revenue                                                
  Product revenue                               $15,556     $ 22,174    $ 45,297    $ 56,663
  Maintenance and service revenue                10,021        7,890      27,792      21,241
                                                -------     --------    --------    --------
     Total revenue                               25,577       30,064      73,089      77,904

Cost of revenue
  Cost of product revenue                         4,494        6,420      20,160      19,193
  Cost of maintenance and service revenue         2,895        2,393       8,889       4,846
                                                -------     --------    --------    --------
     Total cost of revenue                        7,389        8,813      29,049      24,039
                                                -------     --------    --------    --------

     Gross profit                                18,188       21,251      44,040      53,865

Operating expenses
   Research and development                       5,347        5,884      17,811      17,555
   Sales and marketing                            9,389        9,389      28,493      26,710
   General and administrative                     6,940        3,034      13,596       8,391
   Acquisition and merger related charges           ---       18,031         ---      19,231
                                                -------     --------    --------    --------
     Total operating expenses                    21,676       36,338      59,900      71,887
                                                -------     --------    --------    --------

     Operating loss                              (3,488)     (15,087)    (15,860)    (18,022)

Other income, net                                   734          636       2,221       1,546
                                                -------     --------    --------    --------
   Net loss before benefit from
      income taxes                               (2,754)     (14,451)    (13,639)    (16,476)

Benefit from income taxes                        (1,129)      (6,925)     (5,592)     (7,552)
                                                -------     --------    --------    --------
   Net loss                                    $ (1,625)    $ (7,526)   $ (8,047)   $ (8,924)
                                                -------     --------    --------    --------
                                                -------     --------    --------    --------

Basic and diluted net loss per share           $  (0.09)    $  (0.43)   $  (0.45)   $  (0.53)
                                                -------     --------    --------    --------
                                                -------     --------    --------    --------

Number of shares used in earnings
  per share calculations                         17,809       17,462      17,772      16,954
                                                -------     --------    --------    --------
                                                -------     --------    --------    --------
</TABLE>

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


                                      - 2 -
<PAGE>

                         QUICKTURN DESIGN SYSTEMS, INC.
             CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
                             (AMOUNTS IN THOUSANDS)
                                   (UNAUDITED)

<TABLE>
<CAPTION>
                                                        Three Months Ended              Nine Months Ended
                                                           September 30,                  September 30,
                                                    ----------------------------   ----------------------------
                                                        1998           1997            1998           1997
                                                    -------------  -------------   -------------  -------------
<S>                                                 <C>            <C>             <C>            <C>
Net loss                                            $     (1,625)  $     (7,526)   $     (8,047)  $     (8,924)

Other comprehensive income (loss)
    Foreign currency translation adjustment                  (24)          (226)           (527)          (301)
                                                    -------------  -------------   -------------  -------------

    Unrealized gains on securities
      Unrealized holding gains arising during period         203             75             187             68
      Less:  reclassification adjustment
        for gain included in net loss                         (6)           ---             (15)           ---
                                                    -------------  -------------   -------------  -------------
    Net unrealized gain on securities                        197             75             172             68
                                                    -------------  -------------   -------------  -------------

    Total other comprehensive income (loss)                  173           (151)           (355)          (233)
                                                    -------------  -------------   -------------  -------------

Comprehensive loss                                  $     (1,452)  $     (7,677)   $     (8,402)  $     (9,157)
                                                    -------------  -------------   -------------  -------------
                                                    -------------  -------------   -------------  -------------
</TABLE>


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


                                      - 3 -
<PAGE>

                         QUICKTURN DESIGN SYSTEMS, INC.
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                    (AMOUNTS IN THOUSANDS EXCEPT SHARE DATA)

<TABLE>
<CAPTION>
                                                                  September 30,         December 31,
                                                                       1998                 1997
                                                                 -----------------    -----------------
                                                                   (unaudited)
<S>                                                                <C>                <C>
ASSETS
    Current assets
      Cash and cash equivalents                                  $         25,182     $         14,589
      Marketable securities                                                12,610               18,219
      Accounts receivable,  net of allowance for doubtful         
          accounts of $1,840 in 1998 and 1997                              17,486               31,709
      Inventories                                                           6,932               10,899
      Prepaid expenses and other current assets                             4,000                4,324
      Deferred income taxes                                                 8,697                8,697
                                                                 -----------------    -----------------
          Total current assets                                             74,907               88,437
    Marketable securities                                                  20,995               20,326
    Fixed assets, net                                                      12,838               11,118
    Deferred income taxes                                                   8,029                8,029
    Other assets                                                            1,301                1,282
                                                                 -----------------    -----------------
          Total assets                                           $        118,070     $        129,192
                                                                 -----------------    -----------------
                                                                 -----------------    -----------------
                                                                   
LIABILITIES
    Current liabilities
      Short term debt                                            $            ---     $          1,095
      Accounts payable                                                      4,840                6,231
      Accrued liabilities                                                  19,914               20,351
      Deferred revenue                                                      8,460                9,617
                                                                 -----------------    -----------------
           Total current liabilities                                       33,214               37,294
                                                                 -----------------    -----------------
           Total liabilities                                               33,214               37,294
                                                                 -----------------    -----------------
STOCKHOLDERS' EQUITY 
      Common stock, $.001 par value:                             
        Authorized:  40,000,000 shares;                          
        Issued and outstanding: 18,062,179 shares in 1998;    
        17,606,006 shares in 1997                                              18                   18
      Additional paid-in capital                                           93,751               91,122
      Deferred compensation                                                  (382)                (573)
      Retained earnings (deficit)                                          (6,150)               1,896
      Accumulated other comprehensive loss                                   (920)                (565)
      Treasury stock at cost                                     
           (195,000 shares in 1998; none in 1997)                          (1,461)                 ---
                                                                 -----------------    -----------------
           Total stockholders' equity                                      84,856               91,898
                                                                 -----------------    -----------------
           Total liabilities and stockholders' equity            $        118,070     $        129,192
                                                                 -----------------    -----------------
                                                                 -----------------    -----------------
</TABLE>

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


                                        - 4 -
<PAGE>

                         QUICKTURN DESIGN SYSTEMS, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (AMOUNTS IN THOUSANDS)
<TABLE>
<CAPTION>
                                                                          Nine months ended
                                                                            September 30,
                                                                   --------------------------------
                                                                        1998             1997
                                                                   ---------------  ---------------
<S>                                                                <C>              <C>
CASH FLOWS FROM OPERATING ACTIVITIES                               
Net loss                                                            $     (8,047)     $    (8,924)
Adjustments to reconcile net loss to net cash                       
provided by operating activities                                    
    Depreciation and amortization                                          5,193            6,075
    Amortization of deferred compensation                                    108              146
    Gain on sale of marketable securities                                    (15)             ---
    Write off of Arkos Acquisition                                           ---           18,031
Changes in current assets and liabilities                           
    Accounts receivable                                                   14,223           (3,763)
    Inventories                                                            3,967           (4,199)
    Prepaid expenses and other current assets                                324              327
    Deferred tax asset                                                       ---           (6,925)
    Accounts payable and accrued liabilities                              (1,828)           4,472
    Deferred revenue                                                      (1,157)          (1,270)
                                                                   --------------   ---------------
         Net cash provided by operating activities                        12,768            3,970
                                                                   --------------   ---------------
CASH FLOWS FROM INVESTING ACTIVITIES                               
    Acquisition of fixed assets                                           (6,763)          (5,077)
    Sale of marketable securities                                         23,871           12,055
    Purchase of marketable securities                                    (18,744)         (16,235)
    Purchase of Arkos Design, Inc.                                           ---           (5,000)
    Increase (decrease) in other assets                                     (169)           1,279
                                                                   ---------------  ---------------
         Net cash used in investing activities                            (1,805)         (12,978)
                                                                   ---------------  ---------------
CASH FLOWS FROM FINANCING ACTIVITIES                              
    Payment of debt                                                       (1,095)          (2,065)
    Proceeds from stock issuances                                          2,713            2,974
    Repurchase of treasury shares                                         (1,461)             ---
                                                                   --------------   ---------------
         Net cash provided by financing activities                           157              909
                                                                   --------------   ---------------
                                                                   
Effect of exchange rates on cash and cash equivalents                       (527)            (301)
                                                                    
Net increase (decrease) in cash and cash equivalents                      10,593           (8,400)
Cash and cash equivalents at beginning of year                            14,589           25,790
                                                                   --------------   ---------------
Cash and cash equivalents at end of period                          $     25,182      $    17,390
                                                                   --------------   ---------------
                                                                   --------------   ---------------
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION                  
    Cash paid during the period for:                              
       Interest                                                     $         51     $        232
       Income taxes                                                 $        497     $      2,494
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND                    
  FINANCING ACTIVITIES                                              
    Unrealized holding gains on marketable securities               $        187     $         68
    Increase in inventory reserves related to Arkos Acquisition     $        ---     $      4,172
    Assets acquired in Arkos Acquisition                            $        ---     $        641
    Common stock and warrants issued in Arkos Acquisition           $        ---     $      9,500
</TABLE>

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


                                       - 5 -
<PAGE>
                        QUICKTURN DESIGN SYSTEMS, INC.
               NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1.     BASIS OF PRESENTATION
       The condensed consolidated financial statements are unaudited (except for
       the balance sheet information as of December 31, 1997, which is derived
       from the Company's audited financial statements) and reflect all
       adjustments (consisting only of normal recurring adjustments) which are,
       in the opinion of management, necessary for a fair presentation of the
       financial position and operating results for the interim periods. The
       condensed consolidated financial statements should be read in conjunction
       with the consolidated financial statements and notes thereto, together
       with Management's Discussion and Analysis of Financial Condition and
       Results of Operations contained in the Company's 1997 Annual Report to
       Stockholders. The results of operations for the nine months ended
       September 30, 1998 are not necessarily indicative of the results for the
       entire fiscal year ending December 31, 1998, or any future interim
       period.

2.     INVENTORIES
       Inventories comprise:

<TABLE>
<CAPTION>
                                                 September 30,           December 31,
       (IN THOUSANDS)                                1998                    1997
       ---------------------------------------------------------------------------------
                                                  (UNAUDITED)
       <S>                                      <C>                    <C>
       Raw materials                              $      5,937          $       6,780
       Work in process                                     995                  4,119
                                                -----------------      -----------------
                                                  $      6,932          $      10,899
                                                -----------------      -----------------
                                                -----------------      -----------------
</TABLE>

       In the second quarter of 1998, the Company incurred an inventory
       obsolescence charge of $5.7 million in connection with the introduction
       of its Mercury-TM- Design Verification System.

3.     RECLASSIFICATION
       Certain prior year amounts have been reclassified to conform to the
       current year presentation.

4.     RECENT ACCOUNTING PRONOUNCEMENT
       In October 1997, the Accounting Standards Executive Committee of the
       American Institute of Certified Public Accountants issued Statement of
       Position 97-2, "Software Revenue Recognition" ("SOP 97-2"). This
       statement delineates the accounting for software product and maintenance
       revenues. It supersedes Statement of Position 91-1, "Software Revenue
       Recognition," and is effective for transactions entered into in fiscal
       years beginning after December 15, 1997. The Company has evaluated the


                                       - 6 -
<PAGE>

       requirements of SOP 97-2, as amended by Statement of Position 98-4,
       "Deferral of the Effective Date of Provisions of SOP 97-2, Software
       Revenue Recognition," and believes its revenue recognition policy is in
       compliance with the terms of the current pronouncements.

       In June 1998, the Financial Accounting Standards Board issued Statement
       of Financial Accounting Standards No. 133, "Accounting for Derivative
       Instruments and Hedging Activities" ("SFAS 133"), which establishes
       accounting and reporting standards for derivative instruments and hedging
       activities. SFAS 133 requires that an entity recognize all derivatives as
       either assets or liabilities in the balance sheets and measure those
       instruments at fair value. This statement becomes effective for the
       Company for fiscal years beginning after December 15, 1999. The Company
       is evaluating the requirements of SFAS 133 and the effects, if any, on
       the Company's current reporting and disclosures.

5.     STOCK REPURCHASE PROGRAM
       In April 1998, the Board of Directors authorized the repurchase of shares
       of the Company's common stock, at management's discretion, for total
       expenditures of up to $10 million. Shares repurchased under this program
       are expected to be used for issuance upon exercise of employee stock
       options previously granted or to be granted in the future under the
       Company's employee stock plans, thereby reducing the potential dilution
       that might otherwise result from such exercises. The Company's
       repurchases of shares of common stock are recorded as "Treasury stock at
       cost" and result in a reduction of Stockholders' Equity. As of
       September 30, 1998, 195,000 shares of common stock at an average per
       share cost of $7.494 had been repurchased under this Stock Repurchase
       Program.

6.     STOCK OPTION REPRICING
       In June 1998, the Company offered employees the right to cancel certain
       outstanding stock options at their original exercise prices and receive
       new options with a new exercise price. The new exercise price is $7.438
       per share, based on the closing price of the common stock on the last
       trading day prior to the date individual employees accepted the repricing
       offer. Options to purchase a total of 1,546,503 shares at original
       exercise prices ranging from $7.813 to $19.000 per share were cancelled
       and new options to purchase an equivalent number of shares were issued in
       June 1998. Vesting under the new options commences on the original
       vesting dates, and occurs over a new vesting period of five years.
       Furthermore, the Company amended its stock option plans to require
       stockholders' approval of future repricings of stock options. See
       "---Part II., Item 6.(a) Exhibit 10.1 1996 Supplemental Stock Plan, as
       amended" and "--- Part II., Item 6.(a) Exhibit 10.2 1997 Stock Option
       Plan, as amended."


                                       - 7 -
<PAGE>

7.      EARNINGS PER SHARE

        Basic and diluted earnings per share were calculated as follows:

<TABLE>
<CAPTION>
                                                                    Three Months Ended September 30,                          
                                          -------------------------------------------------------------------------------------
        (UNAUDITED)                                        1998                                      1997
                                          -----------------------------------------  ------------------------------------------
        (AMOUNTS IN THOUSANDS                   Net                    Per-share          Net                      Per-share
         EXCEPT PER-SHARE DATA)                Loss         Shares       Amount           Loss        Shares        Amount
        ---------------------------------------------------------------------------  ------------------------------------------
        <S>                               <C>               <C>        <C>           <C>              <C>          <C>
        Net loss                          $      (1,625)                             $     (7,526)

        BASIC AND DILUTED EPS
        Loss available to                 --------------                             -------------
           common stockholders            $      (1,625)      17,809    $   (0.09)   $     (7,526)        17,462   $     (0.43)
                                          --------------  ------------  -----------  --------------  ------------  ------------
                                          --------------  ------------  -----------  --------------  ------------  ------------

                                                                    Nine Months Ended September 30,
                                          -------------------------------------------------------------------------------------
        (UNAUDITED)                                        1998                                      1997
                                          -----------------------------------------  ------------------------------------------
        (AMOUNTS IN THOUSANDS                   Net                    Per-share          Net                      Per-share
         EXCEPT PER-SHARE DATA)                Loss         Shares       Amount           Loss        Shares        Amount
        ---------------------------------------------------------------------------  ------------------------------------------
        <S>                               <C>               <C>        <C>           <C>              <C>          <C>
        Net loss                          $      (8,047)                             $     (8,924)

        BASIC AND DILUTED EPS
        Loss available to                 --------------                             -------------
           common stockholders            $      (8,047)      17,772    $   (0.45)   $     (8,924)        16,954   $     (0.53)
                                          --------------  ------------  -----------  --------------  ------------  ------------
                                          --------------  ------------  -----------  --------------  ------------  ------------
</TABLE>

        At September 30, 1998 and 1997, options to purchase 3,684,405 and
        3,357,607 shares of common stock, respectively, and, warrants for
        1,200,000 shares of common stock, were outstanding but not included in
        the calculation of diluted earnings per share because their inclusion
        would have been anti-dilutive.


                                       - 8 -
<PAGE>

8.      COMPREHENSIVE INCOME

        Effective in the first quarter of 1998, the Company has adopted
        Statement of Financial Accounting Standard No. 130, "Reporting
        Comprehensive Income" ("SFAS 130"). Comprehensive income generally
        represents all changes in stockholders' equity except those resulting
        from investments or contributions by stockholders. The Company has
        reclassified earlier financial statements for comparative purposes. The
        adoption of this standard did not have a material impact on the
        Company's results of operations.

        There were no tax effects allocated to the components of other
        comprehensive loss for the nine months ended September 30, 1998 and
        1997.

        Changes in accumulated other comprehensive loss balances are as follows:

<TABLE>
<CAPTION>
                                                    Foreign      Net Unrealized      Accumulated
                                                   Currency          Gain on            Other
        (UNAUDITED)                               Translation      Marketable       Comprehensive
        (IN THOUSANDS)                            Adjustments      Securities           Loss
        ----------------------------------------------------------------------------------------------
        <S>                                      <C>             <C>                <C>
        For the Nine Months Ended September 30, 1998:

        Balance, December 31, 1997                $      (653)      $        88       $      (565)
          Current-period change                          (527)              172              (355)
                                                 ------------    --------------     ---------------
        Balance, September 30, 1998               $    (1,180)      $       260       $      (920)
                                                 ------------    --------------     ---------------
                                                 ------------    --------------     ---------------
</TABLE>

9.      BANK BORROWING ARRANGEMENTS

        The Company has an unsecured revolving line of credit totaling $5.0 
        million which provides for borrowings through June 1, 1999.  The Company
        is currently in compliance with the covenants of this borrowing 
        agreement.  To date, no funds have been drawn against the line of 
        credit.


                                       - 9 -
<PAGE>

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

RESULTS OF OPERATIONS

TOTAL REVENUE
The Company's 1998 third quarter total revenue of $25.6 million represented a
15% decrease compared to the third quarter total revenue of the prior year.
Total revenue for the first nine months of 1998 of $73.1 million decreased 6%
compared to the first nine months of the prior year. The decreases in total
revenue were attributable primarily to lower product sales in the Asia-Pacific
region and certain segments of the U.S. market, particularly those customers 
that are heavily dependent on sales to the Asia-Pacific region, partially 
offset by increases in maintenance and service revenue. See "---Risk Factors:
International Sales", "---Risk Factors: Potential Fluctuations in Quarterly
Results", "---Risk Factors: Customer Concentration", "---Risk Factors: New
Product Transition", "---Risk Factors: Software Revenue Recognition" and
"---Risk Factors: Dependence Upon Certain Suppliers."

Product revenue for the third quarter of the current year decreased by 30% from
the third quarter of 1997. For the first nine months of the current year,
product revenue decreased by 20% from the first nine months of the prior year.
The decreases in product revenue were primarily driven by the weakness in the
Asia-Pacific market and its indirect adverse effect on the U.S. market, as
discussed above.

Maintenance and service revenue for the third quarter of the current year
increased by 27% over the third quarter of 1997. For the first nine months of
the current year, maintenance and service revenue increased by 31% over the
first nine months of the prior year. The increases in maintenance and service
revenue were attributable primarily to a larger number of maintenance contracts
on customers' installed systems and to increased sales of the Company's custom
engineering services.

International revenue accounted for approximately 28% and 35% of total revenue
in the third quarters of 1998 and 1997, respectively. For the first nine months
of 1998 and 1997, international revenue was approximately 27% and 34% of total
revenue, respectively. The decrease in international revenue as a percentage of
total revenue for the third quarter of 1998 was due primarily to decreased sales
in both the Asia-Pacific and European regions in the third quarter of 1998. The


                                       - 10 -
<PAGE>

decrease in international revenue as a percentage of total revenue for the first
nine months of 1998 was due primarily to lower sales in Asia-Pacific, slightly
offset by overall increased sales in Europe in the first nine months of 1998.
Revenue in the Asia-Pacific region decreased by 39% in the third quarter of 1998
compared to the third quarter of 1997, and decreased by 47% in the first nine
months of 1998 compared to the first nine months of 1997. See "---Risk Factors:
International Sales."

GROSS MARGINS
Gross margins were 71% in the third quarters of both the current year and prior
year. Gross margins in the first nine months of the current year were 60%, which
included an inventory obsolescence charge of $5.7 million resulting from the
introduction of the Company's Mercury Design Verification System ("Mercury") in
the second quarter of the current year. Excluding this inventory obsolescence
charge, gross margins in the first nine months of 1998 were 68% as compared to
69% in the first nine months of 1997. The decrease in gross margins in the first
nine months of 1998, excluding the inventory obsolescence charge, was
attributable primarily to decreased maintenance and service gross margins due to
increased field support requirements to service new and existing contracts. See
"---Risk Factors: Gross Margins."

RESEARCH AND DEVELOPMENT
Research and development expenses decreased by 9% in the third quarter of 1998
compared to the third quarter of the prior year. This decrease was attributable
primarily to reduced hardware prototype expenses for the new Mercury product in 
the third quarter of 1998 as compared to the third quarter of 1997. As a 
percentage of total revenue, research and development expenses were 
approximately 21% and 20% for the third quarters of the current year and prior
year, respectively. For the first nine months of the current year and prior
year, research and development expenses were 24% and 23% of total revenue,
respectively. The Company expects to continue to invest a significant amount of
its resources in research and development.

SALES AND MARKETING
Sales and marketing expenses were flat for the third quarter of 1998 compared to
the third quarter of the prior year. As a percentage of total revenue, sales and
marketing expenses were approximately 37% and 31% in the third quarters of the
current year and prior year, respectively. For the first nine months in the
current year and prior year, sales and marketing expenses were 39% and 34% of
total revenue, respectively. The Company expects that sales and marketing
expenses will continue to increase in dollar amounts as the Company expands its
sales and marketing efforts.


                                       - 11 -
<PAGE>

GENERAL AND ADMINISTRATIVE
General and administrative expenses increased by 129% in the third quarter of
1998 compared to the third quarter of the previous year. This increase was due
largely to legal and advisory expenses of $4.0 million related to an unsolicited
tender offer in the third quarter of 1998, and increased legal costs related to
ongoing patent infringement and other legal proceedings. See "---Part II., 
Item 1. Legal Proceedings." As a percentage of total revenue, general and 
administrative expenses were approximately 27% and 10% for the third quarters 
of the current year and prior year, respectively. For the first nine months of 
the current year and prior year, general and administrative expenses were 19% 
and 11% of total revenue, respectively. The Company expects general and 
administrative expenses to increase in 1998 due primarily to continued legal 
costs.

ACQUISITION AND MERGER RELATED CHARGES
In connection with its merger with SpeedSim, Inc. (the "SpeedSim Merger"), 
the Company recorded one-time charges of $1.2 million in the first quarter of 
1997 that included fees for investment banking, legal and accounting services 
and other costs of consolidating. In connection with the Company's 
acquisition of the assets of Arkos Design, Inc. (the "Arkos Acquisition"), 
the Company incurred charges of $18.0 million in the third quarter of 1997 
representing the allocation of the purchase price and the accrual of certain 
liabilities and other costs.  The balance of the purchase price will be 
amortized over three to five years.

OTHER INCOME, NET
Other income, net, for the third quarter of the current year increased by 15%
over the third quarter of the prior year. For the first nine months of the
current year, other income, net, increased by 44% over the first nine months of
the previous year. The increases were due primarily to increased interest income
due to higher interest rates and higher average balances of cash and marketable
securities, and reduced interest expenses related to the decreased level of debt
associated with maturing equipment leases.

BENEFIT FROM INCOME TAXES
The tax benefit rates were 41% for both the third quarter and first nine months
of 1998, and 48% and 46% for the third quarter and first nine months of 1997,
respectively. The tax benefit rates were in excess of the federal statutory rate
of 35% primarily because of federal and state general business credits and
interest income on investments in tax-exempt obligations.


                                       - 12 -
<PAGE>

NET LOSS AND QUARTERLY RESULTS
The net loss in the third quarter of 1998 was $1.6 million, which included legal
and advisory expenses of $4.0 million related to an unsolicited tender offer, or
$2.3 million, net of tax. See "General and Administrative" above. Excluding the 
expenses related to the tender offer, net income for the third quarter of 1998 
was $735,000. In the corresponding quarter of 1997, the net loss was $7.5 
million, which included one-time charges of $18.0 million for the Arkos 
Acquisition, or $10.0 million, net of tax. See "Acquisitions and Merger Related 
Charges" above. Excluding the Arkos Acquisition charges, net income for the 
third quarter of 1997 was $2.5 million. The decrease in net income, excluding 
the tender offer expenses and the acquisition charges, was due primarily to a 
decrease in revenue. See "Total Revenue" above.

LIQUIDITY AND CAPITAL RESOURCES
Cash and cash equivalents increased by $10.6 million from December 31, 1997 to
September 30, 1998. Net cash provided by operations was $12.8 million, due
primarily to decreased accounts receivable of $14.2 million, decreased
inventories of $4.0 million and depreciation and amortization of $5.2 million,
partially offset by a net loss of $8.0 million, decreased accounts payable and
accrued liabilities of $1.8 million, and decreased deferred revenue of $1.2
million. Net cash used in investing activities was $1.8 million, due primarily
to purchases of marketable securities of $18.7 million and for the acquisition
of fixed assets of $6.8 million, partially offset by sales of marketable
securities of $23.9 million. Net cash provided by financing activities was
$157,000, due primarily to proceeds from stock issuances of $2.7 million,
partially offset by the repurchase of treasury shares of $1.5 million and
payments of debts of $1.1 million.

The Company believes that its cash and cash equivalents, together with its
existing credit facility and the cash flows expected to be generated by
operations, will be sufficient to meet its anticipated cash needs for working
capital, capital expenditures and marketing expansion through at least the next
12 months. Thereafter, if cash generated from operations is insufficient to
satisfy the Company's liquidity requirements, the Company may sell additional
equity or debt securities or obtain additional credit facilities.

RISK FACTORS
IN ADDITION TO OTHER INFORMATION IN THE COMPANY'S ANNUAL REPORT ON FORM 10-K FOR
THE YEAR ENDED DECEMBER 31, 1997 AND IN THE DOCUMENTS INCORPORATED BY REFERENCE
THEREIN, THE FOLLOWING RISK FACTORS SHOULD BE CAREFULLY CONSIDERED IN EVALUATING
THE COMPANY AND ITS BUSINESS BECAUSE SUCH FACTORS CURRENTLY HAVE A SIGNIFICANT
IMPACT OR MAY HAVE A SIGNIFICANT IMPACT ON THE COMPANY'S BUSINESS, OPERATING
RESULTS OR FINANCIAL CONDITION.


                                       - 13 -
<PAGE>

POTENTIAL FLUCTUATIONS IN QUARTERLY RESULTS
Many of the Company's customers order on an as-needed basis and often delay
delivery of firm purchase orders until the commencement dates of such customers'
development projects are determined. Moreover, a significant portion of the
Company's revenue in each quarter generally results from shipments in the last
few weeks of the quarter; therefore, a delay in the shipment of a few orders can
have a significant impact upon total revenue and results of operations in a
given quarter.

CUSTOMER CONCENTRATION
A relatively limited number of customers have historically accounted for a
substantial portion of the Company's revenue. These customers represent early
adopters of emulation technology, typically utilized for the design of complex
integrated circuits. In particular, the Company's top ten customers represented
65% and 58% of total revenue in the third quarters of 1998 and 1997,
respectively. In the first nine months of 1998 and 1997, the top ten customers
accounted for 53% and 44% of total revenue, respectively. The Company expects
that sales of its products to a relatively limited number of customers will
continue to account for a high percentage of revenue for the foreseeable future.
The loss of a major customer or any reduction in orders by such a customer could
have an adverse effect on the Company's financial condition or results of
operations. The Company believes that in the future its results of operations in
a quarterly period could be impacted by the timing of customer development
projects and related purchase orders for the Company's emulation systems, new
product announcements and releases by the Company, and economic conditions
generally and in the electronics industry specifically.

NEW PRODUCT TRANSITION
In June 1998, the Company announced its new Mercury Design Verification System,
which is designed to replace certain of the Company's existing emulation
products. There can be no assurance that this announcement will not cause
customers to defer purchases of the Company's existing emulation products, or
that the transition to the new Mercury System will not be disrupted due to slow
market acceptance or due to disruptions in manufacturing or component
availability, all of which could materially adversely affect the Company's
results of operations.

SOFTWARE REVENUE RECOGNITION
In October 1997, the Accounting Standards Executive Committee of the American
Institute of Certified Public Accountants issued Statement of Position 97-2,
"Software Revenue Recognition" ("SOP 97-2"), which is effective for 


                                       - 14 -
<PAGE>

transactions entered into in fiscal years beginning after December 15, 1997. 
SOP 97-2 was amended by Statement of Position 98-4, "Deferral of the Effective 
Date of Provisions of SOP 97-2, Software Revenue Recognition." Because of the 
uncertainties related to the outcome of these pronouncements, the impact on the 
future financial results of the Company is not currently determinable.

INTERNATIONAL SALES
As a significant portion of the Company's total revenue and net income are
derived from international operations, fluctuations of the U.S. dollar against
foreign currencies and the seasonality of Asia-Pacific, European, and other
international markets could impact the Company's results of operations and
financial condition in a particular quarter.

Revenue from most international customers is denominated in U.S. dollars.
However, receivables from certain other international customers are denominated
in local currencies. Such receivables are hedged, where practicable, by forward
exchange contracts to minimize the impact of foreign exchange rate movements on
the Company's operating results. There have been no material gains or losses
associated with the Company's hedging program. However, there can be no
assurance that fluctuations in the currency exchange rates in the future will
not have a material adverse impact on the receivables derived from foreign
currency denominated sales and thus the Company's operating results and
financial condition. See Note 2 of the Notes to Consolidated Financial
Statements in the Company's 1997 Annual Report to Stockholders.

The Company plans to continue to expand its international sales and distribution
channels. However, there can be no assurance that the Company's products will
achieve widespread commercial acceptance in international markets in the future.
The Company is uncertain whether the recent weakness experienced in the
Asia-Pacific markets will continue in the foreseeable future due to extreme
currency devaluation and liquidity problems in this region. Additionally,
Electronic Design Automation ("EDA") spending budgets of major Japanese
electronics firms have been and may continue to be decreased; consequently,
sales of the Company's design verification products in Japan may continue to be
down in the foreseeable future. The Company's future international sales may be
subject to additional risks associated with international operations, including
currency exchange fluctuations, tariff regulations and requirements for export,
which licenses may on occasion be delayed or difficult to obtain.


                                       - 15 -
<PAGE>

DEPENDENCE UPON CERTAIN SUPPLIERS
Certain key components and board assemblies used in the Company's emulation
products are presently available from sole or limited sources. The inability to
develop alternate sources for these sole or limited sources or to obtain
sufficient quantities of these components or board assemblies could result in
delays or reductions in product shipments which could adversely affect the
Company's results of operations. In particular, the Company currently relies on
Xilinx, Inc. ("Xilinx") for its supply of field programmable gate arrays
("FPGAs") and on General Dynamics for its computer board assemblies. General
Dynamics has recently informed the Company that it will terminate its board
assembly services to the Company some time in early 1999. The Company is
currently in the final stages of negotiation with IBM Corporation ("IBM") to
replace the services currently provided by General Dynamics. There can be no
assurance that these negotiations will be successfully completed or that other
disruptions might not occur during the transition from General Dynamics to IBM.
If for this or any other reason there were to be a reduction or interruption of 
FPGA supply or board assemblies to the Company, the Company's results of 
operations would be materially adversely affected. Although the Company believes
that it can eventually obtain FPGAs and board assemblies from alternate sources 
in the event of a reduction or interruption of FPGA supply or board assemblies 
from Xilinx, IBM or General Dynamics, a significant amount of time and resources
would be required to redesign the Company's emulation systems and software to
accommodate an alternate FPGA supplier or board assembler. In such event, the
Company's results of operations could be materially adversely affected. The
Company currently mitigates this risk by maintaining inventory of these
components in excess of its near-term forecasted requirements. However, there
can be no assurance that these measures will be adequate to alleviate any future
supply problems.

GROSS MARGINS
There can be no assurance that the Company will be able to sustain its recent
gross margins. Furthermore, to the extent that the Company's cost reduction
goals are achieved, any resulting cost savings that are passed on to the
Company's customers may also have an adverse effect on gross margins.

COMPETITION
The EDA industry is highly competitive and rapidly changing. The Company faces
significant competition for emulation-based system-level verification and
cycle-based simulation, in addition to competition from traditional design
verification methodologies which rely on the approach of building and then
testing complete system prototypes. Because of the growing demand for a design
verification methodology which reduces the number of costly design 


                                       - 16 -
<PAGE>

iterations and improves product quality, the Company expects competition in 
the market for system-level verification and cycle-based simulation to 
increase as other companies attempt to introduce emulation and cycle-based 
simulation products and product enhancements, and as major new EDA 
technologies may emerge. Moreover, the Company competes with companies that 
have significantly greater financial, technical and marketing resources, 
greater name recognition and larger installed bases than the Company. In 
addition, many of these competitors have established relationships with 
current and potential customers of the Company. Increased competition could 
result in price reductions, reduced margins and loss of market share, all of 
which could materially adversely affect the Company. The Company believes 
that the principal competitive factors in the EDA market are quality of 
results, the mission-critical nature of the technology, technical support, 
product performance, reputation, price and support of industry standards. The 
Company believes that it currently competes favorably with respect to these 
factors. However, there can be no assurance that the Company will be able to 
compete successfully against current and future competitors or that 
competitive pressures faced by the Company will not materially adversely 
affect its business, operating results and financial condition.

In addition, competitors may resort to litigation as a means of competition.
Such litigation may result in substantial costs to the Company and significant
diversion of management time. In 1995, Mentor Graphics Corporation ("Mentor")
filed suit against the Company for declaratory judgment of non-infringement,
invalidity and unenforceability of several of the Company's patents. Several
actions between the Company and Mentor were consolidated in the U.S. District
Court for the District of Oregon, where six of the Company's patents are now
involved in the disputes. The Company has filed counterclaims against Mentor and
Mentor's French subsidiary, Meta Systems ("Meta"), for infringement and
threatened infringement of those six patents. Mentor has also filed claims
against the Company for defamation and tortious interference. The Company is
also involved in litigation with Mentor's subsidiary in Germany, with Meta in
France, and with Aptix Corporation and Meta in the U.S. District Court, the
Northern District of California. See "---Part II., Item 1. Legal Proceedings."
Although patent and intellectual property disputes in the EDA industry are often
settled through licensing, cross-licensing or similar arrangements, costs
associated with such litigation and arrangements may be substantial.


                                       - 17 -
<PAGE>

IMPACT OF THE YEAR 2000 ISSUE
Many existing computer systems, applications and other control devices use
computer programs that recognize only two digits rather than four digits to
define an applicable year. Therefore, any of the Company's computer systems or
other equipment with embedded date-sensitive technology may recognize a date
using "00" as the year 1900 rather than the year 2000 (the "Year 2000 Issue").
This could result in a system failure or miscalculations causing disruptions of
the Company's operations, or in the ability of the Company's customers to
effectively utilize the Company's design verification products.

The company initiated a Year 2000 Compliance project in the fall of 1997. The
scope of this project includes addressing the Year 2000 Issue in six key areas:
(1) Quickturn's proprietary design verification products, (2) internal-use
computer systems for conducting business operations and product development, (3)
internal embedded systems or "infrastructure", (4) third-party suppliers of
products and services, (5) customers, and (6) marketing joint ventures and other
partnerships. The project consists of addressing these six areas in four phases,
which are: (1) planning, (2) investigation, (3) remediation, and (4) testing.

The Company has completed the planning phase, which involved identifying and
documenting all areas where material disruption of the Company's activities
might occur in case of Year 2000 failure and implementing a plan to remediate
these problems. A project team (the "Year 2000 Committee") is formally chartered
with carrying out the Project. The Year 2000 Committee reports regularly to the
Company's Board of Directors.

To date, the Company has also substantially completed the investigation phase in
all six areas. The investigation includes specifically identifying computer and
other systems, including Quickturn verification products and third party systems
used in Quickturn products and in business operations, that are vulnerable to
Year 2000 failure. During this phase, the Company substantially completed formal
communications with its significant suppliers to determine the extent to which
the Company is vulnerable to those third parties' failure to remedy their own
Year 2000 Issue. Computer equipment and embedded-systems vendors, business
service providers and other third-party vendors on whom the Company relies to
carry out normal business operations generally have indicated substantial
compliance with, or awareness of, the Year 2000 issue. However, the Company's
operations could be materially affected if certain utilities, government
entities or private businesses that interface with these entities are not Year
2000 compliant. To date, the Company cannot be certain that such entities will
achieve Year 2000 compliance.


                                       - 18 -
<PAGE>

Based on the results of the investigation phase, the Company has determined that
it will be required to modify or replace certain portions of its software so
that its computer systems and design verification products will properly utilize
dates beyond December 31, 1999. The Company presently believes that, with
modifications to existing software or conversion to new software, the Year 2000
Issue can be mitigated. However, if such modifications and/or conversions are
not made, the Year 2000 Issue could have a material impact on the operations of
the Company. There can be no assurance that the systems of third parties on
which the Company's systems and business operations rely will be converted in a
timely fashion, or that a failure to convert by a third party, or a conversion
that is incompatible with the Company's systems, would not have a material
adverse effect on the Company.

To mitigate such third party issues, the Company is currently addressing
contingency plans in the event of any material third party failure to comply.
Contingency plans may include such things as stockpiling raw materials, seeking
alternate suppliers, using alternate operating sites or backup systems, or other
measures.

To date, the Company has substantially completed the remediation phase with
respect to internal-use computer hardware and software and embedded systems.
A majority of the critical business and development computer systems have been 
remediated and are in the testing phase. Testing of these systems is expected 
to be completed by March 1999. Quickturn verification product remediation is 
currently under way, with final compliance estimated to be achieved by mid-1999 
for all current product lines and for those products that may be introduced by 
that date. Year 2000 remediation efforts are not expected to materially impact 
or delay the Company's other information technology ("IT") projects or new 
product introductions. In addition, the Company intends to closely monitor the 
remediation efforts by third party business service providers, customers and 
partners. However, there can be no assurance that the efforts of these third 
parties will be successful and that their failure to comply will not materially 
impact the operations of the Company.

The costs to complete the Year 2000 project are based on management's best
estimates. Management currently estimates the total costs of the Year 2000
project at $500,000. The Company is utilizing both internal and external
resources to reprogram, or replace, and test software for Year 2000
modifications. These costs have been and will be absorbed substantially in the
research and development and IT functions. Estimated costs incurred to date for
the Year 2000 Issue modifications are $120,000, all of which have been expensed
in the period incurred. Estimated costs do not include the costs associated with


                                       - 19 -
<PAGE>

contingency plans, which are currently being developed. There can be no 
assurance that these cost estimates will be achieved and actual results could 
differ materially from these estimates. Specific factors that might cause 
such material difference include, but are not limited to, the availability 
and cost of personnel trained in this area, the ability to locate and correct 
all relevant computer code, the failure of third parties which are material to 
the Company's operations to mitigate their own Year 2000 Issue, and similar 
uncertainties. However, the Company is vigilantly pursuing the Year 2000 
Issue, and believes, that once all phases of the project have been completed 
and contingency plans have been explored and put in place, the Company will 
be able to significantly reduce the impact of any disruptions that may occur 
due to this issue.

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133, "Accounting for Derivative Instruments
and Hedging Activities" ("SFAS 133"), which establishes accounting and reporting
standards for derivative instruments and hedging activities. SFAS 133 requires
an entity to recognize all derivatives as either assets or liabilities in the
balance sheets and measure those instruments at fair value. This statement
becomes effective for the Company for fiscal years beginning after December 15,
1999. The Company is evaluating the requirements of SFAS 133 and the effects, if
any, on the Company's current reporting and disclosures.

UNSOLICITED TENDER OFFER
On August 12, 1998, a subsidiary of Mentor Graphics Corporation initiated an 
unsolicited tender offer (the "Tender Offer") to purchase all outstanding shares
of the Company's Common Stock.  The Tender Offer has had, and may continue to 
have, various adverse effects on the Company's business and results of 
operations, including the increased susceptibility of key employees of the 
Company to employment offers by other companies, the risk of negative reactions 
among distributors, suppliers or customers of the Company to the prospect of 
such a change in control of the Company, the distraction of management and other
key employees and the fees and other expenses of financial, legal and other 
advisors to the Company in responding to the tender offer and related legal 
actions.


                                       - 20 -
<PAGE>

OTHER RISK FACTORS
Other factors which could adversely affect the Company's quarterly operating
results in the future include efficiencies as they relate to managing
inventories and fixed assets, the timing of expenditures in anticipation of
increased sales, customer product delivery requirements and shortages of
components or labor.

Due to the factors above, the Company's future earnings and stock price may be
subject to significant volatility, particularly on a quarterly basis. Any
shortfall in total revenue or earnings from levels expected by securities
analysts has had and could in the future have an immediate and significant
adverse effect on the trading price of the Company's common stock. Additionally,
the Company may not learn of such shortfalls until late in a fiscal quarter, 
which could result in an even more immediate and adverse effect on the trading 
price of the Company's common stock.

ITEM 3 IS NOT APPLICABLE AND HAS BEEN OMITTED.


                                       - 21 -
<PAGE>

PART II.  OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

In January 1996, the Company filed a complaint with the International Trade
Commission (the "ITC") in Washington, DC, seeking to stop unfair importation of
logic emulation systems manufactured by Meta Systems ("Meta"), a French
subsidiary of Mentor Graphics Corporation ("Mentor"). In the complaint, the
Company alleges that Mentor's hardware logic emulation systems infringe the
Company's patents. In December 1997, the ITC issued: (1) a Permanent Limited
Exclusion Order which permanently prohibits the importation of hardware logic
emulation system, subassemblies or components manufactured by Mentor and/or
Meta, and (2) a Permanent Cease and Desist Order permanently prohibiting Mentor
from, among other things, selling, offering for sale or advertising the same
hardware logic emulation devices. The ITC's two orders remain in effect until
April 28, 2009, the latest expiration date of the Company's patents involved in
the investigation.

The Company is also engaged in a Federal District Court case with Mentor and
Meta involving six of the Company's patents. Mentor and Meta are seeking a
declaratory judgment of noninfringement, invalidity and unenforceability of the
patents in dispute, and the Company has filed counteractions against Mentor and
Meta for infringement and threatened infringement of the six patents. Mentor has
also claimed in this Federal District Court case that press releases issued by
the Company were defamatory and interfered with Mentor's prospective economic
relations. In June 1997, Quickturn filed a motion for preliminary injunction,
asking the District Court to prohibit Mentor from manufacturing, assembling,
marketing, loaning or otherwise distributing emulation products and components
in the United States, which products and components infringe certain claims in
Quickturn's U.S. Patent No. 5,036,473. On August 1, 1997, the U.S. District
Court in Oregon granted Quickturn's motion for a preliminary injunction against
Mentor's domestic emulation activities. The Federal Circuit Court of Appeals
affirmed the Oregon District Court's decision on August 5, 1998. The Oregon
action is presently set for trial in January 1999.

In October 1997, the Company filed a complaint alleging infringement of the 
German part of the Company's European Patent No. 0 437 491 B1 against Mentor 
Graphics (Deutschland) GmbH, in the District Court of Dusseldorf.  The main 
court hearing for this matter is set for March 1999.

In November 1996, Aptix Corporation ("Aptix") filed a suit against the Company,
in the U.S. District Court, the Northern District of California, alleging


                                       - 22 -
<PAGE>

various violations of the antitrust laws and unfair competition. The District
Court granted a summary judgment motion in favor of the Company and dismissed
the case. Aptix has requested the Court to reconsider its decision and
dismissal.

In February 1998, Aptix and Meta filed a lawsuit against the Company, in the
U.S. District Court, the Northern District of California, alleging infringement
of a U.S. patent owned by Aptix and licensed to Meta. The Company named Mentor
as a party to this suit and filed a counter claim requesting the Court to
declare the Aptix patent to be unenforceable based on inequitable conduct during
the prosecution of the patent. The Company also requested permission from the
Court to bring a claim against Aptix, Meta and Mentor for abuse of process. The
case is currently in the discovery phase.

In October 1998, the Company filed a complaint alleging infringement of the
French part of the Company's European Patent No. 0 437 491 B1 against Mentor
Graphics (France) SARL, Meta Systems (France), a subsidiary of Mentor Graphics
Corporation, and Mentor Graphics (Netherlands) BV, in the District Court of
Paris.

The Company has mounted vigorous defenses against Mentor's defamation and
tortious interference claims and against Aptix and Meta's patent infringement
claim. The outcome of these actions cannot be predicted with certainty.

The Company is engaged in certain other legal and administrative proceedings
incidental to its normal business activities. While it is not possible to
determine the ultimate outcome of these actions at this time, management
believes that any liabilities resulting from such proceedings, or claims which
are pending or known to be threatened, will not have a material adverse effect
on the Company's consolidated financial position or results of operations.

In addition to the legal proceedings described above, the Company is engaged in 
legal proceedings with Mentor Graphics Corporation in connection with the 
Tender Offer.  These legal proceedings are described more fully in the 
Company's filings with the Securities and Exchange Commission on schedule 14D-9 
and the amendments thereto.


                                       - 23 -
<PAGE>

ITEM 5.  OTHER INFORMATION

On August 24, 1998 the board of directors of the Company announced its decision
to recommend that the Company's stockholders reject Mentor Graphics
Corporation's unsolicited tender offer for all outstanding shares of the
Company's Common Stock.  The Company and Mentor Graphics Corporation are 
currently engaged in patent and other litigation concerning various matters, 
including the tender offer. For more information, see the Company's filings with
the Securities and Exchange Commission under Sections 14(a) and 14(d) of the 
Securities and Exchange Act of 1934.


                                       - 24 -
<PAGE>

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

(a)  EXHIBITS

     Exhibit 3.2:    Bylaws of the Registrant, as amended through August 21, 
                     1998.

     Exhibit 10.1:   1996 Supplemental Stock Plan, as amended.

     Exhibit 10.2:   1997 Stock Option Plan, as amended.

     Exhibit 27:     Financial Data Schedule.

(b)  REPORT ON FORM 8-K

     No reports on Form 8-K were filed in the quarter ended September 30, 1998.


ITEMS 2, 3 AND 4 ARE NOT APPLICABLE AND HAVE BEEN OMITTED.


                                     - 25 -
<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.


                                       QUICKTURN DESIGN SYSTEMS, Inc.
                                       ------------------------------
                                                 (Registrant)


Date:  November 13, 1998               By:  /s/  RAYMOND K. OSTBY
       -----------------                    ---------------------------
                                            Raymond K. Ostby,
                                            Vice President, Finance and
                                            Administration,
                                            Chief Financial Officer and
                                            Secretary
                                            (Principal Accounting Officer
                                            and Duly Authorized Officer)


                                     - 26 -

<PAGE>

                                       BYLAWS
                                          
                                         OF
                                          
                          QUICKTURN DESIGN SYSTEMS, INC.,
                               a Delaware Corporation
                                          
                        (AS AMENDED THROUGH AUGUST 21, 1998)



<PAGE>

                                 TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>        <C>                                                              <C>
ARTICLE I - CORPORATE OFFICES 1

    1.1    REGISTERED OFFICE                                                  1
    1.2    OTHER OFFICES                                                      1

ARTICLE II - MEETINGS OF STOCKHOLDERS                                         1

    2.1    PLACE OF MEETINGS                                                  1
    2.2    ANNUAL MEETING                                                     1
    2.3    SPECIAL MEETING                                                    1
    2.4    NOTICE OF STOCKHOLDERS' MEETINGS                                   2
    2.5    ADVANCE NOTICE OF STOCKHOLDER NOMINEES AND STOCKHOLDER BUSINESS    2
    2.6    MANNER OF GIVING NOTICE; AFFIDAVIT OF NOTICE                       3
    2.7    QUORUM                                                             3
    2.8    ADJOURNED MEETING; NOTICE                                          4
    2.9    VOTING                                                             4
    2.10   WAIVER OF NOTICE                                                   4
    2.11   STOCKHOLDER ACTION BY WRITTEN CONSENT WITHOUT A MEETING            5
    2.12   RECORD DATE FOR STOCKHOLDER NOTICE; VOTING; GIVING CONSENTS        5
    2.13   PROXIES                                                            6
    2.14   LIST OF STOCKHOLDERS ENTITLED TO VOTE                              6
    2.15   CONDUCT OF BUSINESS                                                6

ARTICLE III - DIRECTORS                                                       7

    3.1    POWERS                                                             7
    3.2    NUMBER                                                             7
    3.3    LECTION, QUALIFICATION AND TERM OF OFFICE OF DIRECTORS             7
    3.4    RESIGNATION AND VACANCIES                                          7
    3.5    PLACE OF MEETINGS; MEETINGS BY TELEPHONE                           8
    3.6    FIRST MEETINGS                                                     8
    3.7    REGULAR MEETINGS                                                   9
    3.8    SPECIAL MEETINGS; NOTICE                                           9
    3.9    QUORUM                                                             9

                                       -i-

<PAGE>

                                  TABLE OF CONTENTS
                                     (continued)

                                                                            Page
                                                                            ----

    3.10   WAIVER OF NOTICE                                                   9
    3.11   ADJOURNED MEETING; NOTICE                                         10
    3.12   CONDUCT OF BUSINESS                                               10
    3.13   BOARD ACTION BY WRITTEN CONSENT WITHOUT A MEETING                 10
    3.14   FEES AND COMPENSATION OF DIRECTORS                                10
    3.15   APPROVAL OF LOANS TO OFFICERS                                     10
    3.16   REMOVAL OF DIRECTORS                                              11

ARTICLE IV - COMMITTEES                                                      11

    4.1    COMMITTEES OF DIRECTORS                                           11
    4.2    COMMITTEE MINUTES                                                 12
    4.3    MEETINGS AND ACTION OF COMMITTEES                                 12

ARTICLE V - OFFICERS                                                         12

    5.1    OFFICERS                                                          12
    5.2    ELECTION OF OFFICERS                                              12
    5.3    REMOVAL AND RESIGNATION OF OFFICERS                               13
    5.4    CHAIRMAN OF THE BOARD                                             13
    5.5    CHIEF EXECUTIVE OFFICER                                           13
    5.6    PRESIDENT                                                         14
    5.7    VICE PRESIDENT                                                    14
    5.8    SECRETARY                                                         14
    5.9    CHIEF FINANCIAL OFFICER                                           15
    5.10   ASSISTANT SECRETARY                                               15
    5.11   AUTHORITY AND DUTIES OF OFFICERS                                  15

ARTICLE VI - INDEMNITY                                                       15

    6.1    INDEMNIFICATION OF DIRECTORS AND OFFICERS                         15
    6.2    INDEMNIFICATION OF OTHERS                                         15
    6.3    INSURANCE                                                         16

ARTICLE VII - RECORDS AND REPORTS                                            16

    7.1    MAINTENANCE AND INSPECTION OF RECORDS                             16
    7.2    INSPECTION BY DIRECTORS                                           17
    7.3    REPRESENTATION OF SHARES OF OTHER CORPORATIONS                    17

ARTICLE VIII - GENERAL MATTERS                                               17

                                       -ii-

<PAGE>

                                  TABLE OF CONTENTS
                                     (continued)
                                                                            Page
                                                                            ----

    8.1    CHECKS                                                            17
    8.2    EXECUTION OF CORPORATE CONTRACTS AND INSTRUMENTS                  18
    8.3    STOCK CERTIFICATES; PARTLY PAID SHARES                            19
    8.4    SPECIAL DESIGNATION ON CERTIFICATES                               19
    8.5    LOST CERTIFICATES                                                 20
    8.6    CONSTRUCTION; DEFINITIONS                                         20
    8.7    DIVIDENDS                                                         20
    8.8    FISCAL YEAR                                                       20
    8.9    SEAL                                                              20
    8.10   TRANSFER OF STOCK                                                 20
    8.11   STOCK TRANSFER AGREEMENTS                                         20
    8.12   REGISTERED STOCKHOLDERS                                           20

ARTICLE IX - AMENDMENTS                                                      20

ARTICLE X - DISSOLUTION                                                      21

ARTICLE XI - CUSTODIAN                                                       21

    11.1   APPOINTMENT OF A CUSTODIAN IN CERTAIN CASES                       21
    11.2   DUTIES OF CUSTODIAN                                               22
</TABLE>

                                       -iii-

<PAGE>

                                       BYLAWS
                                          
                                         OF
                                          
                           QUICKTURN DESIGN SYSTEMS, INC.
                                          
                        (AS AMENDED THROUGH AUGUST 21, 1998)
                                          
                                     ARTICLE I
                                          
                                 CORPORATE OFFICES

       1.1     REGISTERED OFFICE

       The registered office of the Corporation shall be in the City of 
Dover, County of Kent, State of Delaware.  The name of the registered agent 
of the Corporation at such location is The Corporation Trust Company.

       1.2     OTHER OFFICES

       The board of directors may at any time establish other offices at any 
place or places where the Corporation is qualified to do business.

                                     ARTICLE II

                              MEETINGS OF STOCKHOLDERS

       2.1     PLACE OF MEETINGS

       Meetings of stockholders shall be held at any place, within or outside 
the State of Delaware, designated by the board of directors.  In the absence 
of any such designation, stockholders' meetings shall be held at the 
registered office of the Corporation.

       2.2     ANNUAL MEETING

       The annual meeting of stockholders shall be held each year on a date 
and at a time designated by the board of directors.  At the meeting, 
directors shall be elected and any other proper business may be transacted.

       2.3     SPECIAL MEETING

       A special meeting of the stockholders may be called at any time by (i) 
the board of directors, (ii) the chairman of the board, (iii) the president, 
(iv) the chief executive officer or (v) subject to the procedures set forth 
in this Section 2.3, one or more stockholders holding shares in the aggregate 
entitled to cast not less than ten percent (10%) of the votes at that meeting.

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       Upon request in writing sent by registered mail to the president or 
chief executive officer by any stockholder or stockholders entitled to call a 
special meeting of stockholders pursuant to this Section 2.3, the board of 
directors shall determine a place and time for such meeting, which time shall 
be not less than ninety (90) nor more than one hundred (100) days after the 
receipt and determination of the validity of such request, and a record date 
for the determination of stockholders entitled to vote at such meeting in the 
manner set forth in Section 2.12 hereof. Following such receipt and 
determination, it shall be the duty of the secretary to cause notice to be 
given to the stockholders entitled to vote at such meeting, in the manner set 
forth in Section 2.4 hereof, that a meeting will be held at the place and 
time so determined.

       2.4     NOTICE OF STOCKHOLDERS' MEETINGS

       All notices of meetings with stockholders shall be in writing and 
shall be sent or otherwise given in accordance with Section 2.6 of these 
Bylaws not less than 10 nor more than 60 days before the date of the meeting 
to each stockholder entitled to vote at such meeting.  The notice shall 
specify the place, date and hour of the meeting, and, in the case of a 
special meeting, the purpose or purposes for which the meeting is called.

       2.5     ADVANCE NOTICE OF STOCKHOLDER NOMINEES AND STOCKHOLDER BUSINESS

       To be properly brought before an annual meeting or special meeting, 
nominations for the election of director or other business must be (a) 
specified in the notice of meeting (or any supplement thereto) given by or at 
the direction of the board of directors, (b) otherwise properly brought 
before the meeting by or at the direction of the board of directors, or (c) 
otherwise properly brought before the meeting by a stockholder.  For such 
nominations or other business to be considered properly brought before the 
meeting by a stockholder, such stockholder must have given timely notice and 
in proper form of his intent to bring such business before such meeting.  To 
be timely, such stockholder's notice must be delivered to or mailed and 
received by the secretary of the Corporation not less than 90 days prior to 
the meeting; provided, however, that in the event that less than 100 days 
notice or prior public disclosure of the date of the meeting is given or made 
to stockholders, notice by the stockholder to be timely must be so received 
not later than the close of business on the tenth day following the day on 
which such notice of the date of the meeting was mailed or such public 
disclosure was made.  To be in proper form, a stockholder's notice to the 
secretary shall set forth:

               (i)    the name and address of the stockholder who intends to
               make the nominations, propose the business, and, as the case may
               be, the name and address of the person or persons to be nominated
               or the nature of the business to be proposed;

               (ii)   a representation that the stockholder is a holder of
               record of stock of the Corporation entitled to vote at such
               meeting and, if applicable, intends to appear in person or by
               proxy at the meeting to 

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               nominate the person or persons specified in the notice or 
               introduce the business specified in the notice;

               (iii) if applicable, a description of all arrangements or
               understandings between the stockholder and each nominee and any
               other person or persons (naming such person or persons) pursuant
               to which the nomination or nominations are to be made by the
               stockholder;

               (iv)   such other information regarding each nominee or each
               matter of business to be proposed by such stockholder as would be
               required to be included in a proxy statement filed pursuant to
               the proxy rules of the Securities and Exchange Commission had the
               nominee been nominated, or intended to be nominated, or the
               matter been proposed, or intended to be proposed by the board of
               directors; and

               (v)    if applicable, the consent of each nominee to serve as
               director of the Corporation if so elected.

       The chairman of the meeting may refuse to acknowledge the nomination 
of any person or the proposal of any business not made in compliance with the 
foregoing procedure.

       2.6     MANNER OF GIVING NOTICE; AFFIDAVIT OF NOTICE

       Written notice of any meeting of stockholders, if mailed, is given 
when deposited in the United States mail, postage prepaid, directed to the 
stockholder at his address as it appears on the records of the Corporation.  
An affidavit of the secretary or an assistant secretary or of the transfer 
agent of the Corporation that the notice has been given shall, in the absence 
of fraud, be prima facie evidence of the facts stated therein.

       2.7     QUORUM

       The holders of a majority of the stock issued and outstanding and 
entitled to vote thereat, present in person or represented by proxy, shall 
constitute a quorum at all meetings of the stockholders for the transaction 
of business except as otherwise provided by statute or by the certificate of 
incorporation.  If, however, such quorum is not present or represented at any 
meeting of the stockholders, then either (i) the chairman of the meeting, or 
(ii) the stockholders entitled to vote thereat, present in person or 
represented by proxy, shall have power to adjourn the meeting from time to 
time, without notice other than announcement at the meeting, until a quorum 
is present or represented.  At such adjourned meeting at which a quorum is 
present or represented, any business may be transacted that might have been 
transacted at the meeting as originally noticed.

       When a quorum is present or represented at any meeting, the vote of 
the holders of a majority of the stock having voting power present in person 
or represented by proxy shall decide any question brought before such 
meeting, unless the question is one upon which, by express provisions of the 

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statutes or of the certificate of incorporation, a different vote is 
required, in which case such express provision shall govern and control the 
decision of the question.

       2.8     ADJOURNED MEETING; NOTICE

       When a meeting is adjourned to another time or place, unless these 
Bylaws otherwise require, notice need not be given of the adjourned meeting 
if the time and place thereof are announced at the meeting at which the 
adjournment is taken.  At the adjourned meeting the Corporation may transact 
any business that might have been transacted at the original meeting.  If the 
adjournment is for more than 30 days, or if after the adjournment a new 
record date is fixed for the adjourned meeting, a notice of the adjourned 
meeting shall be given to each stockholder of record entitled to vote at the 
meeting.

       2.9     VOTING

       The stockholders entitled to vote at any meeting of stockholders shall 
be determined in accordance with the provisions of Sections 2.12 and 2.14 of 
these Bylaws, subject to the provisions of Sections 217 and 218 of the 
General Corporation Law of Delaware (relating to voting rights of 
fiduciaries, pledgors and joint owners of stock and to voting trusts and 
other voting agreements).

       Except as may be otherwise provided in the certificate of 
incorporation, each stockholder shall be entitled to one vote for each share 
of capital stock held by such stockholder.

       2.10    WAIVER OF NOTICE

       Whenever notice is required to be given under any provision of the 
General Corporation Law of Delaware or of the certificate of incorporation or 
these Bylaws, a written waiver thereof, signed by the person entitled to 
notice, whether before or after the time stated therein, shall be deemed 
equivalent to notice.  Attendance of a person at a meeting shall constitute a 
waiver of notice of such meeting, except when the person attends a meeting 
for the express purpose of objecting, at the beginning of the meeting, to the 
transaction of any business because the meeting is not lawfully called or 
convened.  Neither the business to be transacted at, nor the purpose of, any 
regular or special meeting of the stockholders need be specified in any 
written waiver of notice unless so required by the certificate of 
incorporation or these Bylaws.
       
       2.11    STOCKHOLDER ACTION BY WRITTEN CONSENT WITHOUT A MEETING

       Unless otherwise provided in the certificate of incorporation, any 
action required by this chapter to be taken at any annual or special meeting 
of stockholders of a Corporation, or any action that may be taken at any 
annual or special meeting of such stockholders, may be taken without a 
meeting, without prior notice, and without a vote if a consent in writing, 
setting forth the action so taken, is signed by the holders of outstanding 
stock having not less than the minimum number of votes that would be 
necessary to authorize or take such action at a meeting at which all shares 
entitled to vote thereon were present and voted.

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       Prompt notice of the taking of the corporate action without a meeting 
by less than unanimous written consent shall be given to those stockholders 
who have not consented in writing.  If the action which is consented to is 
such as would have required the filing of a certificate under any section of 
the General Corporation Law of Delaware if such action had been voted on by 
stockholders at a meeting thereof, then the certificate filed under such 
section shall state, in lieu of any statement required by such section 
concerning any vote of stockholders, that written notice and written consent 
have been given as provided in Section 228 of the General Corporation Law of 
Delaware.

       Notwithstanding the foregoing, effective upon the registration of any 
class of securities of the Corporation pursuant to the requirements of the 
Securities Exchange Act of 1934, as amended, the stockholders of the 
Corporation may not take action by written consent without a meeting but must 
take any such actions at a duly called annual or special meeting.

       2.12    RECORD DATE FOR STOCKHOLDER NOTICE; VOTING; GIVING CONSENTS

       In order that the Corporation may determine the stockholders entitled 
to notice of or to vote at any meeting of stockholders or any adjournment 
thereof, or entitled to express consent to corporate action in writing 
without a meeting, or entitled to receive payment of any dividend or other 
distribution or allotment of any rights, or entitled to exercise any rights 
in respect of any change, conversion or exchange of stock or for the purpose 
of any other lawful action, the board of directors may fix, in advance, a 
record date, which shall not be more than 60 nor less than 10 days before the 
date of such meeting, nor more than 60 days prior to any other action.

       If the board of directors does not so fix a record date, the fixing of 
such record date shall be governed by the provisions of Section 213 of the 
General Corporation Law of Delaware.

       A determination of stockholders of record entitled to notice of or to 
vote at a meeting of stockholders shall apply to any adjournment of the 
meeting; provided, however, that the board of directors may fix a new record 
date for the adjourned meeting.

       2.13    PROXIES

       Each stockholder entitled to vote at a meeting of stockholders or to
express consent or dissent to corporate action in writing without a meeting may
authorize another person or persons to act for him by a written proxy, signed by
the stockholder and filed with the secretary of the Corporation, but no such
proxy shall be voted or acted upon after 3 years from its date, unless the proxy
provides for a longer period.  A proxy shall be deemed signed if the
stockholder's name is placed on the proxy (whether by manual signature,
typewriting, telegraphic transmission or otherwise) by the stockholder or the
stockholder's attorney-in-fact.  The revocability of a proxy that states on its
face that it is irrevocable shall be governed by the provisions of
Section 212(c) of the General Corporation Law of Delaware.

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       2.14    LIST OF STOCKHOLDERS ENTITLED TO VOTE

       The officer who has charge of the stock ledger of a Corporation shall 
prepare and make, at least 10 days before every meeting of stockholders, a 
complete list of the stockholders entitled to vote at the meeting, arranged 
in alphabetical order, and showing the address of each stockholder and the 
number of shares registered in the name of each stockholder.  Such list shall 
be open to the examination of any stockholder, for any purpose germane to the 
meeting, during ordinary business hours, for a period of at least 10 days 
prior to the meeting, either at a place within the city where the meeting is 
to be held, which place shall be specified in the notice of the meeting, or, 
if not so specified, at the place where the meeting is to be held.  The stock 
ledger shall also be produced and kept at the time and place of the meeting 
during the whole time thereof, and may be inspected by any stockholder who is 
present.  The stock ledger shall be the only evidence as to who are the 
stockholders entitled to examine the stock ledger, the list of stockholders 
or the books of the Corporation, or to vote in person or by proxy at any 
meeting of stockholders and of the number of shares held by each such 
stockholder.

       2.15    CONDUCT OF BUSINESS

       Meetings of stockholders shall be presided over by the chairman of the
board, if any, or in his absence by the president, or in his absence by a vice
president, or in the absence of the foregoing persons by a chairman designated
by the board of directors, or in the absence of such designation by a chairman
chosen at the meeting.  The secretary shall act as secretary of the meeting, but
in his absence the chairman of the meeting may appoint any person to act as
secretary of the meeting.  The chairman of any meeting of stockholders shall
determine the order of business and the procedures at the meeting, including
such matters as the regulation of the manner of voting and conduct of business.


                                  ARTICLE III

                                   DIRECTORS

       3.1     POWERS

       Subject to the provisions of the General Corporation Law of Delaware 
and any limitations in the certificate of incorporation or these Bylaws 
relating to action required to be approved by the stockholders or by the 
outstanding shares, the business and affairs of the Corporation shall be 
managed and all corporate powers shall be exercised by or under the direction 
of the board of directors.

       3.2     NUMBER

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       The authorized number of directors of the Corporation shall be eight 
(8).  No reduction of the authorized number of directors shall have the 
effect of removing any director before that director's term of office 
expires.  

       3.3     ELECTION, QUALIFICATION AND TERM OF OFFICE OF DIRECTORS

       Except as provided in Section 3.4 of these Bylaws, at each annual 
meeting of stockholders, directors of the Corporation shall be elected to 
hold office until the expiration of the term for which they are elected, and 
until their successors have been duly elected and qualified; except that if 
any such election shall not be so held, such election shall take place at a 
stockholders' meeting called and held in accordance with the Delaware General 
Corporation Law. 

       Directors need not be stockholders unless so required by the 
certificate of incorporation or these Bylaws, wherein other qualifications 
for directors may be prescribed.  

       Elections of directors need not be by written ballot.

       3.4     RESIGNATION AND VACANCIES

       Any director may resign at any time upon written notice to the 
Corporation.  Stockholders may remove directors with or without cause.  Any 
vacancy occurring in the board of directors with or without cause may be 
filled by a majority of the remaining members of the board of directors, 
although such majority is less than a quorum, or by a plurality of the votes 
cast at a meeting of stockholders, and each director so elected shall hold 
office until the expiration of the term of office of the director whom he has 
replaced.

       Unless otherwise provided in the certificate of incorporation or these 
Bylaws:

               (i)    Vacancies and newly created directorships resulting from
       any increase in the authorized number of directors elected by all of the
       stockholders having the right to vote as a single class may be filled by
       a majority of the directors then in office, although less than a quorum,
       or by a sole remaining director.

               (ii)   Whenever the holders of any class or classes of stock or
       series thereof are entitled to elect one or more directors by the
       provisions of the certificate of incorporation, vacancies and newly
       created directorships of such class or classes or series may be filled
       by a majority of the directors elected by such class or classes or
       series thereof then in office, or by a sole remaining director so
       elected.

       If at any time, by reason of death or resignation or other cause, the 
Corporation should have no directors in office, then any officer or any 
stockholder or an executor, administrator, trustee or guardian of a 
stockholder, or other fiduciary entrusted with like responsibility for the 
person or estate of a stockholder, may apply to the Court of Chancery for a 
decree summarily ordering an election as provided in Section 211 of the 
General Corporation Law of Delaware.

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       If, at the time of filling any vacancy or any newly created 
directorship, the directors then in office constitute less than a majority of 
the whole board (as constituted immediately prior to any such increase), then 
the Court of Chancery may, upon application of any stockholder or 
stockholders holding at least 10% of the total number of the shares at the 
time outstanding having the right to vote for such directors, summarily order 
an election to be held to fill any such vacancies or newly created 
directorships, or to replace the directors chosen by the directors then in 
office as aforesaid, which election shall be governed by the provisions of 
Section 211 of the General Corporation Law of Delaware as far as applicable.

       3.5     PLACE OF MEETINGS; MEETINGS BY TELEPHONE

       The board of directors of the Corporation may hold meetings, both 
regular and special, either within or outside the State of Delaware.

       Unless otherwise restricted by the certificate of incorporation or 
these Bylaws, members of the board of directors, or any committee designated 
by the board of directors, may participate in a meeting of the board of 
directors, or any committee, by means of conference telephone or similar 
communications equipment by means of which all persons participating in the 
meeting can hear each other, and such participation in a meeting shall 
constitute presence in person at the meeting.

       3.6     FIRST MEETINGS

       The first meeting of each newly elected board of directors shall be 
held at such time and place as shall be fixed by the vote of the stockholders 
at the annual meeting and no notice of such meeting shall be necessary to the 
newly elected directors in order legally to constitute the meeting, provided 
a quorum shall be present. In the event of the failure of the stockholders to 
fix the time or place of such first meeting of the newly elected board of 
directors, or in the event such meeting is not held at the time and place so 
fixed by the stockholders, the meeting may be held at such time and place as 
shall be specified in a notice given as hereinafter provided for special 
meetings of the board of directors, or as shall be specified in a written 
waiver signed by all of the directors.

       3.7     REGULAR MEETINGS

       Regular meetings of the board of directors may be held without notice 
at such time and at such place as shall from time to time be determined by 
the board.

       3.8     SPECIAL MEETINGS; NOTICE

       Special meetings of the board of directors for any purpose or purposes 
may be called at any time by the chairman of the board, the president, any 
vice president, the secretary or any two directors.

       Notice of the time and place of special meetings shall be delivered 
personally or by telephone to each director or sent by first-class mail or 
telegram, charges prepaid, addressed to each director at 

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that director's address as it is shown on the records of the Corporation.  If 
the notice is mailed, it shall be deposited in the United States mail at 
least 4 days before the time of the holding of the meeting.  If the notice is 
delivered personally or by telephone or by telegram, it shall be delivered 
personally or by telephone or to the telegraph company at least 48 hours 
before the time of the holding of the meeting.  Any oral notice given 
personally or by telephone may be communicated either to the director or to a 
person at the office of the director who the person giving the notice has 
reason to believe will promptly communicate it to the director.  The notice 
need not specify the purpose or the place of the meeting, if the meeting is 
to be held at the principal executive office of the Corporation.

       3.9     QUORUM

       At all meetings of the board of directors, a majority of the 
authorized number of directors shall constitute a quorum for the transaction 
of business and the act of a majority of the directors present at any meeting 
at which there is a quorum shall be the act of the board of directors, except 
as may be otherwise specifically provided by statute or by the certificate of 
incorporation.

       3.10    WAIVER OF NOTICE

       Whenever notice is required to be given under any provision of the 
General Corporation Law of Delaware or of the certificate of incorporation or 
these Bylaws, a written waiver thereof, signed by the person entitled to 
notice, whether before or after the time stated therein, shall be deemed 
equivalent to notice.  Attendance of a person at a meeting shall constitute a 
waiver of notice of such meeting, except when the person attends a meeting 
for the express purpose of objecting, at the beginning of the meeting, to the 
transaction of any business because the meeting is not lawfully called or 
convened.  Neither the business to be transacted at, nor the purpose of, any 
regular or special meeting of the directors, or members of a committee of 
directors, need be specified in any written waiver of notice unless so 
required by the certificate of incorporation or these Bylaws.

       3.11    ADJOURNED MEETING; NOTICE

       If a quorum is not present at any meeting of the board of directors, 
then the directors present thereat may adjourn the meeting from time to time, 
without notice other than announcement at the meeting, until a quorum is 
present.

       3.12    CONDUCT OF BUSINESS

       Meetings of the board of directors shall be presided over by the 
chairman of the board, if any, or in his absence by the chief executive 
officer, or in their absence by a chairman chosen at the meeting.  The 
secretary shall act as secretary of the meeting, but in his absence the 
chairman of the meeting may appoint any person to act as secretary of the 
meeting.  The chairman of any meeting shall determine the order of business 
and the procedures at the meeting.

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       3.13    BOARD ACTION BY WRITTEN CONSENT WITHOUT A MEETING

       Unless otherwise restricted by the certificate of incorporation or 
these Bylaws, any action required or permitted to be taken at any meeting of 
the board of directors, or of any committee thereof, may be taken without a 
meeting if all members of the board or committee, as the case may be, consent 
thereto in writing and the writing or writings are filed with the minutes of 
proceedings of the board or committee.

       3.14    FEES AND COMPENSATION OF DIRECTORS

       Unless otherwise restricted by the certificate of incorporation or 
these Bylaws, the board of directors shall have the authority to fix the 
compensation of directors.  The directors may be paid their expenses, if any, 
of attendance at each meeting of the board of directors and may be paid a 
fixed sum for attendance at each meeting of the board of directors or a 
stated salary as director.  No such payment shall preclude any director from 
serving the Corporation in any other capacity and receiving compensation 
therefor.  Members of special or standing committees may be allowed like 
compensation for attending committee meetings.

       3.15    APPROVAL OF LOANS TO OFFICERS

       The Corporation may lend money to, or guarantee any obligation of, or 
otherwise assist any officer or other employee of the Corporation or of its 
subsidiary, including any officer or employee who is a director of the 
Corporation or its subsidiary, whenever, in the judgment of the directors, 
such loan, guaranty or assistance may reasonably be expected to benefit the 
Corporation.  The loan, guaranty or other assistance may be with or without 
interest and may be unsecured, or secured in such manner as the board of 
directors shall approve, including, without limitation, a pledge of shares of 
stock of the Corporation.  Nothing in this section contained shall be deemed 
to deny, limit or restrict the powers of guaranty or warranty of the 
Corporation at common law or under any statute.

       3.16    REMOVAL OF DIRECTORS

       Unless otherwise restricted by statute, by the certificate of 
incorporation or by these Bylaws, any director or the entire board of 
directors may be removed, with or without cause, by the holders of a majority 
of the shares then entitled to vote at an election of directors.  If at any 
time a class or series of shares is entitled to elect one or more directors, 
the provisions of this Article 3.16 shall apply to the vote of that class or 
series and not to the vote of the outstanding shares as a whole.

       No reduction of the authorized number of directors shall have the 
effect of removing any director prior to the expiration of such director's 
term of office.

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                                     ARTICLE IV

                                     COMMITTEES

       4.1     COMMITTEES OF DIRECTORS

       The board of directors may, by resolution passed by a majority of the 
whole board, designate one or more committees, with each committee to consist 
of one or more of the directors of the Corporation.  The board may designate 
one or more directors as alternate members of any committee, who may replace 
any absent or disqualified member at any meeting of the committee.  In the 
absence or disqualification of a member of a committee, the member or members 
thereof present at any meeting and not disqualified from voting, whether or 
not he or they constitute a quorum, may unanimously appoint another member of 
the board of directors to act at the meeting in the place of any such absent 
or disqualified member.  Any such committee, to the extent provided in the 
resolution of the board of directors or in the Bylaws of the Corporation, 
shall have and may exercise all the powers and authority of the board of 
directors in the management of the business and affairs of the Corporation, 
and may authorize the seal of the Corporation to be affixed to all papers 
that may require it; but no such committee shall have the power or authority 
to (i) amend the certificate of incorporation (except that a committee may, 
to the extent authorized in the resolution or resolutions providing for the 
issuance of shares of stock adopted by the board of directors as provided in 
Section 151(a) of the General Corporation Law of Delaware, fix any of the 
preferences or rights of such shares relating to dividends, redemption, 
dissolution, any distribution of assets of the Corporation or the conversion 
into, or the exchange of such shares for, shares of any other class or 
classes or any other series of the same or any other class or classes of 
stock of the Corporation), (ii) adopt an agreement of merger or consolidation 
under Sections 251 or 252 of the General Corporation Law of Delaware, (iii) 
recommend to the stockholders the sale, lease or exchange of all or 
substantially all of the Corporation's property and assets, (iv) recommend to 
the stockholders a dissolution of the Corporation or a revocation of a 
dissolution, or (v) amend the Bylaws of the Corporation; and, unless the 
board resolution establishing the committee, the Bylaws or the certificate of 
incorporation expressly so provide, no such committee shall have the power or 
authority to declare a dividend, to authorize the issuance of stock, or to 
adopt a certificate of ownership and merger pursuant to Section 253 of the 
General Corporation Law of Delaware.

       4.2     COMMITTEE MINUTES

       Each committee shall keep regular minutes of its meetings and report 
the same to the board of directors when required.

       4.3     MEETINGS AND ACTION OF COMMITTEES

       Meetings and actions of committees shall be governed by, and held and 
taken in accordance with, the provisions of Article III of these Bylaws, 
Section 3.5 (place of meetings and meetings by telephone), Section 3.7 
(regular meetings), Section 3.8 (special meetings and notice), Section 3.9 
(quorum), Section 3.10 (waiver of notice), Section 3.11 (adjournment and 
notice of adjournment), 

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Section 3.12 (conduct of business) and 3.13 (action without a meeting), with 
such changes in the context of those Bylaws as are necessary to substitute 
the committee and its members for the board of directors and its members; 
provided, however, that the time of regular meetings of committees may also 
be called by resolution of the board of directors and that notice of special 
meetings of committees shall also be given to all alternate members, who 
shall have the right to attend all meetings of the committee.  The board of 
directors may adopt rules for the government of any committee not 
inconsistent with the provisions of these Bylaws.

                                     ARTICLE V
                                          
                                      OFFICERS

       5.1     OFFICERS

       The officers of the Corporation shall be a chief executive officer, 
one or more vice presidents, a secretary and a chief financial officer.  The 
Corporation may also have, at the discretion of the board of directors, a 
chairman of the board, a president, a chief operating officer, one or more 
executive, senior or assistant vice presidents, assistant secretaries and any 
such other officers as may be appointed in accordance with the provisions of 
Section 5.2 of these Bylaws.  Any number of offices may be held by the same 
person.

       5.2     ELECTION OF OFFICERS

       Except as otherwise provided in this Section 5.2, the officers of the 
Corporation shall be chosen by the board of directors, subject to the rights, 
if any, of an officer under any contract of employment.  The board of 
directors may appoint, or empower an officer to appoint, such officers and 
agents of the business as the Corporation may require (whether or not such 
officer or agent is described in this Article V), each of whom shall hold 
office for such period, have such authority, and perform such duties as are 
provided in these Bylaws or as the board of directors may from time to time 
determine.  Any vacancy occurring in any office of the Corporation shall be 
filled by the board of directors or may be filled by the officer, if any, who 
appointed such officer.

       5.3     REMOVAL AND RESIGNATION OF OFFICERS

       Subject to the rights, if any, of an officer under any contract of 
employment, any officer may be removed, either with or without cause, by an 
affirmative vote of the majority of the board of directors at any regular or 
special meeting of the board or, except in the case of an officer chosen by 
the board of directors, by any officer upon whom such power of removal may be 
conferred by the board of directors or, in the case of an officer appointed 
by another officer, by such other officer.

       Any officer may resign at any time by giving written notice to the 
Corporation.  Any resignation shall take effect at the date of the receipt of 
that notice or at any later time specified in that notice; and, unless 
otherwise specified in that notice, the acceptance of the resignation shall 
not 

                                       -12-

<PAGE>

be necessary to make it effective.  Any resignation is without prejudice to 
the rights, if any, of the Corporation under any contract to which the 
officer is a party.

       5.4     CHAIRMAN OF THE BOARD

       The chairman of the board, if such an officer be elected, shall, if 
present, preside at meetings of the board of directors and exercise and 
perform such other powers and duties as may from time to time be assigned to 
him by the board of directors or as may be prescribed by these Bylaws.  If 
there is no chief executive officer, then the chairman of the board shall 
also be the chief executive officer of the Corporation and shall have the 
powers and duties prescribed in Section 5.5 of these Bylaws.

       5.5     CHIEF EXECUTIVE OFFICER

       The Chief Executive Officer of the Corporation shall, subject to the 
control of the Board of Directors, have general supervision, direction and 
control of the business and the officers of the Corporation.  He or she shall 
preside at all meetings of the stockholders and, in the absence or 
nonexistence of a Chairman of the Board at all meetings of the Board of 
Directors.  He or she shall have the general powers and duties of management 
usually vested in the chief executive officer of a Corporation, including 
general supervision, direction and control of the business and supervision of 
other officers of the Corporation, and shall have such other powers and 
duties as may be prescribed by the Board of Directors or these Bylaws.

       The Chief Executive Officer shall, without limitation, have the 
authority to execute bonds, mortgages and other contracts requiring a seal, 
under the seal of the Corporation, except where required or permitted by law 
to be otherwise signed and executed and except where the signing and 
execution thereof shall be expressly delegated by the Board of Directors to 
some other officer or agent of the Corporation.

       5.6     PRESIDENT

       Subject to such supervisory powers as may be given by these Bylaws or 
the Board of Directors to the Chairman of the Board or the Chief Executive 
Officer, if there be such officers, the president shall have general 
supervision, direction and control of the business and supervision of other 
officers of the Corporation, and shall have such other powers and duties as 
may be prescribed by the Board of Directors or these Bylaws.  In the event a 
Chief Executive Officer shall not be appointed, the President shall have the 
duties of such office.

       5.7     VICE PRESIDENT

       In the absence or disability of the president, the vice presidents, if 
any, in order of their rank as fixed by the board of directors or, if not 
ranked, a vice president designated by the board of directors, shall perform 
all the duties of the chief executive officer and when so acting shall have 
all the powers of, and be subject to all the restrictions upon, the chief 
executive officer.  The vice presidents shall have such other powers and 
perform such other duties as from time to time may be 

                                       -13-

<PAGE>

prescribed for them respectively by the board of directors, these Bylaws, the 
chief executive officer or the chairman of the board.

       5.8     SECRETARY

       The secretary shall keep or cause to be kept, at the principal 
executive office of the Corporation or such other place as the board of 
directors may direct, a book of minutes of all meetings and actions of 
directors, committees of directors, and stockholders.  The minutes shall show 
the time and place of each meeting, whether regular or special (and, if 
special, how authorized and the notice given), the names of those present at 
directors' meetings or committee meetings, the number of shares present or 
represented at stockholders' meetings, and the proceedings thereof.

       The secretary shall keep, or cause to be kept, at the principal 
executive office of the Corporation or at the office of the Corporation's 
transfer agent or registrar, as determined by resolution of the board of 
directors, a share register, or a duplicate share register, showing the names 
of all stockholders and their addresses, the number and classes of shares 
held by each, the number and date of certificates evidencing such shares, and 
the number and date of cancellation of every certificate surrendered for 
cancellation.

       The secretary shall give, or cause to be given, notice of all meetings 
of the stockholders and of the board of directors required to be given by law 
or by these Bylaws.  He shall keep the seal of the Corporation, if one be 
adopted, in safe custody and shall have such other powers and perform such 
other duties as may be prescribed by the board of directors or by these 
Bylaws.

       5.9     CHIEF FINANCIAL OFFICER

       The chief financial officer shall keep and maintain, or cause to be 
kept and maintained, adequate and correct books and records of accounts of 
the properties and business transactions of the Corporation, including 
accounts of its assets, liabilities, receipts, disbursements, gains, losses, 
capital, retained earnings and shares.  The books of account shall at all 
reasonable times be open to inspection by any director.

       The chief financial officer shall deposit all money and other 
valuables in the name and to the credit of the Corporation with such 
depositaries as may be designated by the board of directors.  He shall 
disburse the funds of the Corporation as may be ordered by the board of 
directors, shall render to the chief executive officer and directors, 
whenever they request it, an account of all of his transactions as treasurer 
and of the financial condition of the Corporation, and shall have such other 
powers and perform such other duties as may be prescribed by the board of 
directors or these Bylaws.

       5.10    ASSISTANT SECRETARY

       The assistant secretary, or, if there is more than one, the assistant 
secretaries in the order determined by the stockholders or board of directors 
(or if there be no such determination, then in the 

                                       -14-

<PAGE>

order of their election) shall, in the absence of the secretary or in the 
event of his or her inability or refusal to act, perform the duties and 
exercise the powers of the secretary and shall perform such other duties and 
have such other powers as the board of directors or the stockholders may from 
time to time prescribe.

       5.11    AUTHORITY AND DUTIES OF OFFICERS

       In addition to the foregoing authority and duties, all officers of the 
Corporation shall respectively have such authority and perform such duties in 
the management of the business of the Corporation as may be designated from 
time to time by the board of directors or the stockholders.

                                     ARTICLE VI
                                          
                                     INDEMNITY

       6.1     INDEMNIFICATION OF DIRECTORS AND OFFICERS

       The Corporation shall, to the maximum extent and in the manner 
permitted by the General Corporation Law of Delaware, indemnify each of its 
directors and officers against expenses (including attorneys' fees), 
judgments, fines, settlements, and other amounts actually and reasonably 
incurred in connection with any proceeding, arising by reason of the fact 
that such person is or was an agent of the Corporation.  For purposes of this 
Section 6.1, a "director" or "officer" of the Corporation includes any person 
(i) who is or was a director or officer of the Corporation, (ii) who is or 
was serving at the request of the Corporation as a director or officer of 
another Corporation, partnership, joint venture, trust or other enterprise, 
or (iii) who was a director or officer of a Corporation which was a 
predecessor Corporation of the Corporation or of another enterprise at the 
request of such predecessor Corporation.

       6.2     INDEMNIFICATION OF OTHERS

       The Corporation shall have the power, to the extent and in the manner 
permitted by the General Corporation Law of Delaware, to indemnify each of 
its employees and agents (other than directors and officers) against expenses 
(including attorneys' fees), judgments, fines, settlements, and other amounts 
actually and reasonably incurred in connection with any proceeding, arising 
by reason of the fact that such person is or was an agent of the Corporation. 
 For purposes of this Section 6.2, an "employee" or "agent" of the 
Corporation (other than a director or officer) includes any person (i) who is 
or was an employee or agent of the Corporation, (ii) who is or was serving at 
the request of the Corporation as an employee or agent of another 
Corporation, partnership, joint venture, trust or other enterprise, or (iii) 
who was an employee or agent of a Corporation which was a predecessor 
Corporation of the Corporation or of another enterprise at the request of 
such predecessor Corporation.

                                       -15-

<PAGE>

       6.3     INSURANCE

       The Corporation may purchase and maintain insurance on behalf of any 
person who is or was a director, officer, employee or agent of the 
Corporation, or is or was serving at the request of the Corporation as a 
director, officer, employee or agent of another Corporation, partnership, 
joint venture, trust or other enterprise against any liability asserted 
against him and incurred by him in any such capacity, or arising out of his 
status as such, whether or not the Corporation would have the power to 
indemnify him against such liability under the provisions of the General 
Corporation Law of Delaware.

                                    ARTICLE VII
                                          
                                RECORDS AND REPORTS

       7.1     MAINTENANCE AND INSPECTION OF RECORDS

       The Corporation shall, either at its principal executive office or at 
such place or places as designated by the board of directors, keep a record 
of its stockholders listing their names and addresses and the number and 
class of shares held by each stockholder, a copy of these Bylaws as amended 
to date, accounting books, and other records.

       Any stockholder of record, in person or by attorney or other agent, 
shall, upon written demand under oath stating the purpose thereof, have the 
right during the usual hours for business to inspect for any proper purpose 
the Corporation's stock ledger, a list of its stockholders, and its other 
books and records and to make copies or extracts therefrom.  A proper purpose 
shall mean a purpose reasonably related to such person's interest as a 
stockholder.  In every instance where an attorney or other agent is the 
person who seeks the right to inspection, the demand under oath shall be 
accompanied by a power of attorney or such other writing that authorizes the 
attorney or other agent to so act on behalf of the stockholder. The demand 
under oath shall be directed to the Corporation at its registered office in 
Delaware or at its principal place of business.

       7.2     INSPECTION BY DIRECTORS

       Any director shall have the right to examine the Corporation's stock 
ledger, a list of its stockholders and its other books and records for a 
purpose reasonably related to his position as a director.  The Court of 
Chancery is hereby vested with the exclusive jurisdiction to determine 
whether a director is entitled to the inspection sought. The Court may 
summarily order the Corporation to permit the director to inspect any and all 
books and records, the stock ledger, and the stock list and to make copies or 
extracts therefrom.  The Court may, in its discretion, prescribe any 
limitations or conditions with reference to the inspection, or award such 
other and further relief as the Court may deem just and proper.

                                       -16-

<PAGE>

       7.3     REPRESENTATION OF SHARES OF OTHER CORPORATIONS

       The chairman of the board, the chief executive officer, any vice 
president, the chief financial officer, the secretary or assistant secretary 
of this Corporation, or any other person authorized by the board of directors 
or the chief executive officer or a vice president, is authorized to vote, 
represent, and exercise on behalf of this Corporation all rights incident to 
any and all shares of any other Corporation or Corporations standing in the 
name of this Corporation.  The authority granted herein may be exercised 
either by such person directly or by any other person authorized to do so by 
proxy or power of attorney duly executed by such person having the authority.

                                          
                                    ARTICLE VIII
                                          
                                  GENERAL MATTERS

       8.1     CHECKS

       From time to time, the board of directors shall determine by 
resolution which person or persons may sign or endorse all checks, drafts, 
other orders for payment of money, notes or other evidences of indebtedness 
that are issued in the name of or payable to the Corporation, and only the 
persons so authorized shall sign or endorse those instruments.

       8.2     EXECUTION OF CORPORATE CONTRACTS AND INSTRUMENTS

       The board of directors, except as otherwise provided in these Bylaws, 
may authorize any officer or officers, or agent or agents, to enter into any 
contract or execute any instrument in the name of and on behalf of the 
Corporation; such authority may be general or confined to specific instances. 
Unless so authorized or ratified by the board of directors or within the 
agency power of an officer, no officer, agent or employee shall have any 
power or authority to bind the Corporation by any contract or engagement or 
to pledge its credit or to render it liable for any purpose or for any amount.
        
       8.3     STOCK CERTIFICATES; PARTLY PAID SHARES 

       The shares of a Corporation shall be represented by certificates, 
provided that the board of directors of the Corporation may provide by 
resolution or resolutions that some or all of any or all classes or series of 
its stock shall be uncertificated shares.  Any such resolution shall not 
apply to shares represented by a certificate until such certificate is 
surrendered to the Corporation.  Notwithstanding the adoption of such a 
resolution by the board of directors, every holder of stock represented by 
certificates and upon request every holder of uncertificated shares shall be 
entitled to have a certificate signed by, or in the name of the Corporation 
by the chairman or vice-chairman of the board of directors, or the president 
or vice-president, and by the treasurer or an assistant treasurer, or the 
secretary or an assistant secretary of such Corporation representing the 
number of shares registered in certificate form. Any or all of the signatures 
on the certificate may be a facsimile.  In case 

                                       -17-

<PAGE>

any officer, transfer agent or registrar who has signed or whose facsimile 
signature has been placed upon a certificate has ceased to be such officer, 
transfer agent or registrar before such certificate is issued, it may be 
issued by the Corporation with the same effect as if he were such officer, 
transfer agent or registrar at the date of issue.

       The Corporation may issue the whole or any part of its shares as 
partly paid and subject to call for the remainder of the consideration to be 
paid therefor.  Upon the face or back of each stock certificate issued to 
represent any such partly paid shares, upon the books and records of the 
Corporation in the case of uncertificated partly paid shares, the total 
amount of the consideration to be paid therefor and the amount paid thereon 
shall be stated. Upon the declaration of any dividend on fully paid shares, 
the Corporation shall declare a dividend upon partly paid shares of the same 
class, but only upon the basis of the percentage of the consideration 
actually paid thereon.

       8.4     SPECIAL DESIGNATION ON CERTIFICATES

       If the Corporation is authorized to issue more than one class of stock 
or more than one series of any class, then the powers, the designations, the 
preferences, and the relative, participating, optional or other special 
rights of each class of stock or series thereof and the qualifications, 
limitations or restrictions of such preferences and/or rights shall be set 
forth in full or summarized on the face or back of the certificate that the 
Corporation shall issue to represent such class or series of stock; provided, 
however, that, except as otherwise provided in Section 202 of the General 
Corporation Law of Delaware, in lieu of the foregoing requirements there may 
be set forth on the face or back of the certificate that the Corporation 
shall issue to represent such class or series of stock a statement that the 
Corporation will furnish without charge to each stockholder who so requests 
the powers, the designations, the preferences, and the relative, 
participating, optional or other special rights of each class of stock or 
series thereof and the qualifications, limitations or restrictions of such 
preferences and/or rights.

       8.5     LOST CERTIFICATES

       Except as provided in this Section 8.5, no new certificates for shares 
shall be issued to replace a previously issued certificate unless the latter 
is surrendered to the Corporation and cancelled at the same time.  The 
Corporation may issue a new certificate of stock or uncertificated shares in 
the place of any certificate theretofore issued by it, alleged to have been 
lost, stolen or destroyed, and the Corporation may require the owner of the 
lost, stolen or destroyed certificate, or his legal representative, to give 
the Corporation a bond sufficient to indemnify it against any claim that may 
be made against it on account of the alleged loss, theft or destruction of 
any such certificate or the issuance of such new certificate or 
uncertificated shares.

       8.6     CONSTRUCTION; DEFINITIONS

       Unless the context requires otherwise, the general provisions, rules 
of construction, and definitions in the Delaware General Corporation Law 
shall govern the construction of these Bylaws.  Without limiting the 
generality of this provision, the singular number includes the plural, the 
plural 

                                       -18-

<PAGE>

number includes the singular, and the term "person" includes both a 
Corporation and a natural person.

       8.7     DIVIDENDS

       The directors of the Corporation, subject to any restrictions 
contained in the certificate of incorporation, may declare and pay dividends 
upon the shares of its capital stock pursuant to the General Corporation Law 
of Delaware. Dividends may be paid in cash, in property, or in shares of the 
Corporation's capital stock.

       The directors of the Corporation may set apart out of any of the funds 
of the Corporation available for dividends a reserve or reserves for any 
proper purpose and may abolish any such reserve. Such purposes shall include 
but not be limited to equalizing dividends, repairing or maintaining any 
property of the Corporation, and meeting contingencies.

       8.8     FISCAL YEAR

       The fiscal year of the Corporation shall be fixed by resolution of the 
board of directors and may be changed by the board of directors.

       8.9     SEAL

       The Corporation may adopt a corporate seal, which may be altered at 
pleasure, and may use the same by causing it or a facsimile thereof to be 
impressed or affixed or in any other manner reproduced.

       8.10    TRANSFER OF STOCK

       Upon surrender to the Corporation or the transfer agent of the 
Corporation of a certificate for shares duly endorsed or accompanied by 
proper evidence of succession, assignation or authority to transfer, it shall 
be the duty of the Corporation to issue a new certificate to the person 
entitled thereto, cancel the old certificate, and record the transaction in 
its books.

       8.11    STOCK TRANSFER AGREEMENTS

       The Corporation shall have power to enter into and perform any 
agreement with any number of stockholders of any one or more classes of stock 
of the Corporation to restrict the transfer of shares of stock of the 
Corporation of any one or more classes owned by such stockholders in any 
manner not prohibited by the General Corporation Law of Delaware.

       8.12    REGISTERED STOCKHOLDERS

       The Corporation shall be entitled to recognize the exclusive right of 
a person registered on its books as the owner of shares to receive dividends 
and to vote as such owner, shall be entitled to hold 

                                       -19-

<PAGE>

liable for calls and assessments the person registered on its books as the 
owner of shares, and shall not be bound to recognize any equitable or other 
claim to or interest in such share or shares on the part of another person, 
whether or not it shall have express or other notice thereof, except as 
otherwise provided by the laws of Delaware.

                                     ARTICLE IX
                                          
                                     AMENDMENTS

       The original or other Bylaws of the Corporation may be adopted, 
amended or repealed by the stockholders entitled to vote; provided, however, 
that the Corporation may, in its certificate of incorporation, confer the 
power to adopt, amend or repeal Bylaws upon the directors.  The fact that 
such power has been so conferred upon the directors shall not divest the 
stockholders of the power, nor limit their power to adopt, amend or repeal 
Bylaws.

                                     ARTICLE X
                                          
                                    DISSOLUTION

       If it should be deemed advisable in the judgment of the board of 
directors of the Corporation that the Corporation should be dissolved, the 
board, after the adoption of a resolution to that effect by a majority of the 
whole board at any meeting called for that purpose, shall cause notice to be 
mailed to each stockholder entitled to vote thereon of the adoption of the 
resolution and of a meeting of stockholders to take action upon the 
resolution.

       At the meeting a vote shall be taken for and against the proposed 
dissolution.  If a majority of the outstanding stock of the Corporation 
entitled to vote thereon votes for the proposed dissolution, then a 
certificate stating that the dissolution has been authorized in accordance 
with the provisions of Section 275 of the General Corporation Law of Delaware 
and setting forth the names and residences of the directors and officers 
shall be executed, acknowledged, and filed and shall become effective in 
accordance with Section 103 of the General Corporation Law of Delaware.  Upon 
such certificate's becoming effective in accordance with Section 103 of the 
General Corporation Law of Delaware, the Corporation shall be dissolved.

                                       -20-

<PAGE>

                                     ARTICLE XI
                                          
                                     CUSTODIAN

       11.1    APPOINTMENT OF A CUSTODIAN IN CERTAIN CASES

       The Court of Chancery, upon application of any stockholder, may 
appoint one or more persons to be custodians and, if the Corporation is 
insolvent, to be receivers, of and for the Corporation when:

       (i)     at any meeting held for the election of directors the 
stockholders are so divided that they have failed to elect successors to 
directors whose terms have expired or would have expired upon qualification 
of their successors; or

       (ii)    the business of the Corporation is suffering or is threatened 
with irreparable injury because the directors are so divided respecting the 
management of the affairs of the Corporation that the required vote for 
action by the board of directors cannot be obtained and the stockholders are 
unable to terminate this division; or

       (iii)   the Corporation has abandoned its business and has failed 
within a reasonable time to take steps to dissolve, liquidate or distribute 
its assets.

       11.2    DUTIES OF CUSTODIAN

       The custodian shall have all the powers and title of a receiver 
appointed under Section 291 of the General Corporation Law of Delaware, but 
the authority of the custodian shall be to continue the business of the 
Corporation and not to liquidate its affairs and distribute its assets, 
except when the Court of Chancery otherwise orders and except in cases 
arising under Sections 226(a)(3) or 352(a)(2) of the General Corporation Law 
of Delaware.

                                       -21-

<PAGE>

                              CERTIFICATE OF SECRETARY

       The undersigned, Secretary of QUICKTURN DESIGN SYSTEMS, INC., a 
Delaware Corporation, hereby certifies that the foregoing is a full, true and 
correct copy of the Bylaws of said Corporation, with all amendments to date 
of this Certificate.

       The undersigned hereby certifies that such Bylaws were duly approved 
by the Board of Directors of the Corporation at a meeting held on October 15, 
1993.

       WITNESS the signature of the undersigned and the seal of the 
Corporation this 15th day of October, 1993.

                                       /s/ Raymond K. Ostby
                                       ----------------------------------------
                                       Raymond K. Ostby, Secretary


                                       -22-



<PAGE>

                            QUICKTURN DESIGN SYSTEMS, INC.

                       1996 SUPPLEMENTAL STOCK PLAN, AS AMENDED

     1.   PURPOSES OF THE PLAN.  The purposes of this Plan are:

            -       to attract and retain the best available personnel for
                    positions of substantial responsibility, 

            -       to provide additional incentive to key Employees, Directors
                    and Consultants, and 

            -       to promote the success of the Company's business.  

     Options granted under the Plan will be Nonstatutory Stock Options.  

     2.   DEFINITIONS.  As used herein, the following definitions shall apply:

          (a)  "ADMINISTRATOR" means the Board or any of its Committees as 
shall be administering the Plan, in accordance with Section 4 of the Plan.

          (b)  "APPLICABLE LAWS" means the requirements relating to the 
administration of stock option plans under U. S. state corporate laws, U.S. 
federal and state securities laws, the Code, any stock exchange or quotation 
system on which the Common Stock is listed or quoted and the applicable laws 
of any foreign country or jurisdiction where Options are granted under the 
Plan.

          (c)  "BOARD" means the Board of Directors of the Company.

          (d)  "CODE" means the Internal Revenue Code of 1986, as amended.

          (e)  "COMMITTEE"  means a committee of Directors appointed by the 
Board in accordance with Section 4 of the Plan.

          (f)  "COMMON STOCK" means the Common Stock of the Company.

          (g)  "COMPANY" means Quickturn Design Systems, Inc., a Delaware 
corporation.

          (h)  "CONSULTANT" means any person, including an advisor, engaged 
by the Company or a Parent or Subsidiary to render services to such entity.

          (i)  "DIRECTOR" means a member of the Board.

          (j)  "DISABILITY" means total and permanent disability as defined 
in Section 22(e)(3) of the Code.

<PAGE>

          (k)  "EMPLOYEE" means any person, including Officers, employed by 
the Company or any Parent or Subsidiary of the Company.  A Service Provider 
shall not cease to be an Employee in the case of (i) any leave of absence 
approved by the Company or (ii) transfers between locations of the Company or 
between the Company, its Parent, any Subsidiary, or any successor.  Neither 
service as a Director nor payment of a director's fee by the Company shall be 
sufficient to constitute "employment" by the Company.

          (l)  "EXCHANGE ACT" means the Securities Exchange Act of 1934, as 
amended.

          (m)  "FAIR MARKET VALUE" means, as of any date, the value of Common 
Stock determined as follows:

               (i)    If the Common Stock is listed on any established stock 
exchange or a national market system, including without limitation the Nasdaq 
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its 
Fair Market Value shall be the closing sales price for such stock (or the 
closing bid, if no sales were reported) as quoted on such exchange or system 
for the last market trading day prior to the time of determination, as 
reported in THE WALL STREET JOURNAL or such other source as the Administrator 
deems reliable;

               (ii)   If the Common Stock is regularly quoted by a recognized 
securities dealer but selling prices are not reported, the Fair Market Value 
of a Share of Common Stock shall be the mean between the high bid and low 
asked prices for the Common Stock on the last market trading day prior to the 
day of determination, as reported in THE WALL STREET JOURNAL or such other 
source as the Administrator deems reliable;

               (iii)  In the absence of an established market for the Common 
Stock, the Fair Market Value shall be determined in good faith by the 
Administrator.

          (n)  "NONSTATUTORY STOCK OPTION" means an Option not intended to 
qualify as an incentive stock option within the meaning of Section 422 of the 
Code and the regulations promulgated thereunder.

          (o)  "NOTICE OF GRANT" means a written or electronic notice 
evidencing certain terms and conditions of an individual Option grant.  The 
Notice of Grant is part of the Option Agreement.

          (p)  "OFFICER" means a person who is an officer of the Company 
within the meaning of Section 16 of the Exchange Act and the rules and 
regulations promulgated thereunder.

          (q)  "OPTION" means a stock option granted pursuant to the Plan.

          (r)  "OPTION AGREEMENT" means an agreement between the Company and 
an Optionee evidencing the terms and conditions of an individual Option 
grant.  The Option Agreement is subject to the terms and conditions of the 
Plan.

                                       -2-

<PAGE>

          (s)  "OPTION EXCHANGE PROGRAM" means a program whereby 
outstanding options are surrendered in exchange for options with a lower 
exercise price.

          (t)  "OPTIONED STOCK" means the Common Stock subject to an Option.

          (u)  "OPTIONEE" means the holder of an outstanding Option granted 
under the Plan.

          (v)  "PARENT" means a "parent corporation," whether now or 
hereafter existing, as defined in Section 424(e) of the Code.

          (w)  "PLAN" means this 1996 Supplemental Stock Plan, as amended.

          (x)  "SERVICE PROVIDER" means an Employee, Director or Consultant. 

          (y)  "SHARE" means a share of the Common Stock, as adjusted in 
accordance with Section 13 of the Plan.

          (z)  "SUBSIDIARY" means a "subsidiary corporation", whether now or 
hereafter existing, as defined in Section 424(f) of the Code.

     3.   STOCK SUBJECT TO THE PLAN.  Subject to the provisions of Section 13 
of the Plan, the maximum aggregate number of Shares which may be optioned and 
sold under the Plan is 1,000,000 Shares.  The Shares may be authorized, but 
unissued, or reacquired Common Stock.  

          If an Option expires or becomes unexercisable without having been 
exercised in full, or is surrendered pursuant to an Option Exchange Program, 
the unpurchased Shares which were subject thereto shall become available for 
future grant or sale under the Plan (unless the Plan has terminated).  Shares 
that have actually been issued under the Plan shall not be returned to the 
Plan and shall not become available for future distribution under the Plan, 
except that if unvested Shares are repurchased by the Company at their 
original purchase price, such Shares shall become available for future grant 
under the Plan. 

     4.   ADMINISTRATION OF THE PLAN.

          (a)  PROCEDURE.  The Plan shall be administered by (A) the Board or 
(B) a Committee, which committee shall be constituted to satisfy Applicable 
Laws. 

          (b)  RULE 16b-3.  To the extent desirable to qualify transactions 
hereunder as exempt under Rule 16b-3, the transactions contemplated hereunder 
shall be structured to satisfy the requirements for exemption under Rule 
16b-3. 

                                       -3-

<PAGE>

          (c)  POWERS OF THE ADMINISTRATOR.  Subject to the provisions of the 
Plan, and in the case of a Committee, subject to the specific duties 
delegated by the Board to such Committee, the Administrator shall have the 
authority, in its discretion:

               (i)    to determine the Fair Market Value of the Common Stock, 
in accordance with Section 2(m) of the Plan;

               (ii)   to select the Service Providers to whom Options may be 
granted hereunder;

               (iii)  to determine whether and to what extent Options are 
granted hereunder;

               (iv)   to determine the number of shares of Common Stock to be 
covered by each Option granted hereunder;

               (v)    to approve forms of agreement for use under the Plan;

               (vi)   to determine the terms and conditions, not inconsistent 
with the terms of the Plan, of any award granted hereunder.  Such terms and 
conditions include, but are not limited to, the exercise price, the time or 
times when Options may be exercised (which may be based on performance 
criteria), any vesting acceleration or waiver of forfeiture restrictions, and 
any restriction or limitation regarding any Option  or the shares of Common 
Stock relating thereto, based in each case on such factors as the 
Administrator, in its sole discretion, shall determine;

               (vii)  to reduce the exercise price of any Option to the then 
current Fair Market Value if the Fair Market Value of the Common Stock 
covered by such Option shall have declined since the date the Option was 
granted, provided that no such action shall be taken unless and until the 
approval of the Company's stockholders shall have been obtained;

               (viii) to institute an Option Exchange Program, provided that 
no such action shall be taken unless and until the approval of the Company's 
stockholders shall have been obtained;

               (ix)   to construe and interpret the terms of the Plan and 
awards granted pursuant to the Plan;

               (x)    to prescribe, amend and rescind rules and regulations 
relating to the Plan, including rules and regulations relating to sub-plans 
established for the purpose of qualifying for preferred tax treatment under 
foreign tax laws;

               (xi)   to modify or amend each Option (subject to Section 
15(b) of the Plan), including the discretionary authority to extend the 
post-termination exercisability period of Options longer than is otherwise 
provided for in the Plan;

                                       -4-

<PAGE>

               (xii)  to authorize any person to execute on behalf of the 
Company any instrument required to effect the grant of an Option or  
previously granted by the Administrator;

               (xiii) to determine the terms and restrictions applicable to 
Options; 

               (xiv)  to allow Optionees to satisfy withholding tax 
obligations by electing to have the Company withhold from the Shares to be 
issued upon exercise of an Option or Stock Purchase Right that number of 
Shares having a Fair Market Value equal to the amount required to be 
withheld.  The Fair Market Value of the Shares to be withheld shall be 
determined on the date that the amount of tax to be withheld is to be 
determined.  All elections by an Optionee to have Shares withheld for this 
purpose shall be made in such form and under such conditions as the 
Administrator may deem necessary or advisable; and

               (xv)   to make all other determinations deemed necessary or 
advisable for administering the Plan.

          (d)  EFFECT OF ADMINISTRATOR'S DECISION.  The Administrator's 
decisions, determinations and interpretations shall be final and binding on 
all Optionees and any other holders of Options.

     5.   ELIGIBILITY.  Options may be granted to Service Providers.

     6.   LIMITATION.  Neither the Plan nor any Option shall confer upon an 
Optionee any right with respect to continuing the Optionee's relationship as 
a Service Provider with the Company, nor shall they interfere in any way with 
the Optionee's right or the Company's right to terminate such relationship at 
any time, with or without cause.

     7.   TERM OF PLAN.  The Plan shall become effective upon its adoption by 
the Board.  It shall continue in effect for ten (10) years, unless sooner 
terminated under Section 14 of the Plan. 

     8.   TERM OF OPTION.  The term of each Option shall be stated in the 
Option Agreement. 

     9.   OPTION EXERCISE PRICE AND CONSIDERATION.

          (a)  EXERCISE PRICE.  The per share exercise price for the Shares 
to be issued pursuant to exercise of an Option shall be determined by the 
Administrator.

          (b)  WAITING PERIOD AND EXERCISE DATES.  At the time an Option is 
granted, the Administrator shall fix the period within which the Option may 
be exercised and shall determine any conditions which must be satisfied 
before the Option may be exercised.

          (c)  FORM OF CONSIDERATION.  The Administrator shall determine the 
acceptable form of consideration for exercising an Option, including the 
method of payment.  Such consideration may consist entirely of:

                                       -5-

<PAGE>

               (i)    cash;

               (ii)   check;

               (iii)  promissory note;

               (iv)   other Shares which (A) in the case of Shares acquired 
upon exercise of an option, have been owned by the Optionee for more than six 
months on the date of surrender, and (B) have a Fair Market Value on the date 
of surrender equal to the aggregate exercise price of the Shares as to which 
said Option shall be exercised;

               (v)    consideration received by the Company under a cashless 
exercise program implemented by the Company in connection with the Plan;

               (vi)   a reduction in the amount of any Company liability to 
the Optionee, including any liability attributable to the Optionee's 
participation in any Company-sponsored deferred compensation program or 
arrangement;

               (vii)  such other consideration and method of payment for the 
issuance of Shares to the extent permitted by Applicable Laws; or

               (viii) any combination of the foregoing methods of payment.

     10.  EXERCISE OF OPTION.

          (a)  PROCEDURE FOR EXERCISE; RIGHTS AS A SHAREHOLDER. Any Option 
granted hereunder shall be exercisable according to the terms of the Plan and 
at such times and under such conditions as determined by the Administrator 
and set forth in the Option Agreement.  An Option may not be exercised for a 
fraction of a Share.

               An Option shall be deemed exercised when the Company receives: 
(i) written or electronic notice of exercise (in accordance with the Option 
Agreement) from the person entitled to exercise the Option, and (ii) full 
payment for the Shares with respect to which the Option is exercised.  Full 
payment may consist of any consideration and method of payment authorized by 
the Administrator and permitted by the Option Agreement and the Plan.  Shares 
issued upon exercise of an Option shall be issued in the name of the Optionee 
or, if requested by the Optionee, in the name of the Optionee and his or her 
spouse. Until the Shares are issued (as evidenced by the appropriate entry on 
the books of the Company or of a duly authorized transfer agent of the 
Company), no right to vote or receive dividends or any other rights as a 
shareholder shall exist with respect to the Optioned Stock, notwithstanding 
the exercise of the Option. The Company shall issue (or cause to be issued) 
such Shares promptly after the Option is exercised.  No adjustment will be 
made for a dividend or other right for which the record date is prior to the 
date the Shares are issued, except as provided in Section 13 of the Plan.

                                       -6-

<PAGE>

               Exercising an Option in any manner shall decrease the number 
of Shares thereafter available, both for purposes of the Plan and for sale 
under the Option, by the number of Shares as to which the Option is exercised.

          (b)  TERMINATION OF RELATIONSHIP AS A SERVICE PROVIDER.  If an 
Optionee ceases to be a Service Provider, other than upon the Optionee's 
death or Disability, the Optionee may exercise his or her Option, but only 
within such period of time as is specified in the Option Agreement, and only 
to the extent that the Option is vested on the date of termination (but in no 
event later than the expiration of the term of such Option as set forth in 
the Option Agreement). In the absence of a specified time in the Option 
Agreement, the Option shall remain exercisable for three (3) months following 
the Optionee's termination. If, on the date of termination, the Optionee is 
not vested as to his or her entire Option, the Shares covered by the unvested 
portion of the Option shall revert to the Plan.  If, after termination, the 
Optionee does not exercise his or her Option within the time specified by the 
Administrator, the Option shall terminate, and the Shares covered by such 
Option shall revert to the Plan.

          (c)  DISABILITY OF OPTIONEE.  If an Optionee ceases to be a Service 
Provider as a result of the Optionee's Disability, the Optionee may exercise 
his or her Option within such period of time as is specified in the Option 
Agreement, to the extent the Option is vested on the date of termination (but 
in no event later than the expiration of the term of such Option as set forth 
in the Option Agreement).  In the absence of a specified time in the Option 
Agreement, the Option shall remain exercisable for twelve (12) months 
following the Optionee's termination.  If, on the date of termination, the 
Optionee is not vested as to his or her entire Option, the Shares covered by 
the unvested portion of the Option shall revert to the Plan.  If, after 
termination, the Optionee does not exercise his or her Option within the time 
specified herein, the Option shall terminate, and the Shares covered by such 
Option shall revert to the Plan.

          (d)  DEATH OF OPTIONEE.  If an Optionee dies while a Service 
Provider, the Option may be exercised within such period of time as is 
specified in the Option Agreement (but in no event later than the expiration 
of the term of such Option as set forth in the Notice of Grant), by the 
Optionee's estate or by a person who acquires the right to exercise the 
Option by bequest or inheritance, but only to the extent that the Option is 
vested on the date of death.  In the absence of a specified time in the 
Option Agreement, the Option shall remain exercisable for twelve (12) months 
following the Optionee's termination.  If, at the time of death, the Optionee 
is not vested as to his or her entire Option, the Shares covered by the 
unvested portion of the Option shall immediately revert to the Plan.  The 
Option may be exercised by the executor or administrator of the Optionee's 
estate or, if none, by the person(s) entitled to exercise the Option under 
the Optionee's will or the laws of descent or distribution.  If the Option is 
not so exercised within the time specified herein, the Option shall 
terminate, and the Shares covered by such Option shall revert to the Plan.

          (e)  BUYOUT PROVISIONS.  The Administrator may at any time offer to 
buy out for a payment in cash or Shares, an Option previously granted based 
on such terms and conditions as the Administrator shall establish and 
communicate to the Optionee at the time that such offer is made.

                                       -7-

<PAGE>

     11.  NON-TRANSFERABILITY OF OPTIONS .  Unless determined otherwise by 
the Administrator, an Option may not be sold, pledged, assigned, 
hypothecated, transferred, or disposed of in any manner other than by will or 
by the laws of descent or distribution and may be exercised, during the 
lifetime of the Optionee, only by the Optionee.  If the Administrator makes 
an Option transferable, such Option shall contain such additional terms and 
conditions as the Administrator deems appropriate.

     12.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION, DISSOLUTION, MERGER OR  
          ASSET SALE. 

          (a)  CHANGES IN CAPITALIZATION.  Subject to any required action by 
the shareholders of the Company, the number of shares of Common Stock covered 
by each outstanding Option, and the number of shares of Common Stock which 
have been authorized for issuance under the Plan but as to which no Options 
have yet been granted or which have been returned to the Plan upon 
cancellation or expiration of an Option, as well as the price per share of 
Common Stock covered by each such outstanding Option, shall be 
proportionately adjusted for any increase or decrease in the number of issued 
shares of Common Stock resulting from a stock split, reverse stock split, 
stock dividend, combination or reclassification of the Common Stock, or any 
other increase or decrease in the number of issued shares of Common Stock 
effected without receipt of consideration by the Company; provided, however, 
that conversion of any convertible securities of the Company shall not be 
deemed to have been "effected without receipt of consideration."  Such 
adjustment shall be made by the Board, whose determination in that respect 
shall be final, binding and conclusive. Except as expressly provided herein, 
no issuance by the Company of shares of stock of any class, or securities 
convertible into shares of stock of any class, shall affect, and no 
adjustment by reason thereof shall be made with respect to, the number or 
price of shares of Common Stock subject to an Option. 

          (b)  DISSOLUTION OR LIQUIDATION.  In the event of the proposed 
dissolution or liquidation of the Company, the Administrator shall notify 
each Optionee as soon as practicable prior to the effective date of such 
proposed transaction.  The Administrator in its discretion may provide for an 
Optionee to have the right to exercise his or her Option until ten (10) days 
prior to such transaction as to all of the Optioned Stock covered thereby, 
including Shares as to which the Option would not otherwise be exercisable.  
In addition, the Administrator may provide that any Company repurchase option 
applicable to any Shares purchased upon exercise of an Option shall lapse as 
to all such Shares, provided the proposed dissolution or liquidation takes 
place at the time and in the manner contemplated.  To the extent it has not 
been previously exercised, an Option will terminate immediately prior to the 
consummation of such proposed action.

          (c)  MERGER OR ASSET SALE.  In the event of a merger of the Company 
with or into another corporation, or the sale of substantially all of the 
assets of the Company, each outstanding Option shall be assumed or an 
equivalent option or right substituted by the successor corporation or a 
Parent or Subsidiary of the successor corporation.  In the event that the 
successor corporation refuses to assume or substitute for the Option, the 
Optionee shall fully vest in and have the right to exercise the Option as to 
all of the Optioned Stock, including Shares as to which it would not 
otherwise be vested or exercisable.  If an Option becomes fully vested and 
exercisable in lieu of assumption or substitution in the event of a merger or 
sale of assets, the Administrator shall notify the Optionee in 

                                       -8-

<PAGE>

writing or electronically that the Option shall be fully vested and 
exercisable for a period of fifteen (15) days from the date of such notice, 
and the Option shall terminate upon the expiration of such period.  For the 
purposes of this paragraph, the Option shall be considered assumed if, 
following the merger or sale of assets, the option or right confers the right 
to purchase or receive, for each Share of Optioned Stock, immediately prior 
to the merger or sale of assets, the consideration (whether stock, cash, or 
other securities or property) received in the merger or sale of assets by 
holders of Common Stock for each Share held on the effective date of the 
transaction (and if holders were offered a choice of consideration, the type 
of consideration chosen by the holders of a majority of the outstanding 
Shares); provided, however, that if such consideration received in the merger 
or sale of assets is not solely common stock of the successor corporation or 
its Parent, the Administrator may, with the consent of the successor 
corporation, provide for the consideration to be received upon the exercise 
of the Option, for each Share of Optioned Stock to be solely common stock of 
the successor corporation or its Parent equal in fair market value to the per 
share consideration received by holders of Common Stock in the merger or sale 
of assets.

     13.  DATE OF GRANT.  The date of grant of an Option shall be, for all 
purposes, the date on which the Administrator makes the determination 
granting such Option, or such other later date as is determined by the 
Administrator. Notice of the determination shall be provided to each Optionee 
within a reasonable time after the date of such grant.

     14.  AMENDMENT AND TERMINATION OF THE PLAN.

          (a)  AMENDMENT AND TERMINATION.  The Board may at any time amend, 
alter, suspend or terminate the Plan.  

          (b)  EFFECT OF AMENDMENT OR TERMINATION.  No amendment, alteration, 
suspension or termination of the Plan shall impair the rights of any 
Optionee, unless mutually agreed otherwise between the Optionee and the 
Administrator, which agreement must be in writing and signed by the Optionee 
and the Company. Termination of the Plan shall not affect the Administrator's 
ability to exercise the powers granted to it hereunder with respect to 
options granted under the Plan prior to the date of such termination.

     15.  CONDITIONS UPON ISSUANCE OF SHARES.  

          (a)  LEGAL COMPLIANCE.  Shares shall not be issued pursuant to the 
exercise of an Option unless the exercise of such Option and the issuance and 
delivery of such Shares shall comply with Applicable Laws and shall be 
further subject to the approval of counsel for the Company with respect to 
such compliance.

          (b)  INVESTMENT REPRESENTATIONS.  As a condition to the exercise of 
an Option the Company may require the person exercising such Option  to 
represent and warrant at the time of any such exercise that the Shares are 
being purchased only for investment and without any present 

                                       -9-

<PAGE>

intention to sell or distribute such Shares if, in the opinion of counsel for 
the Company, such a representation is required.

     16.  INABILITY TO OBTAIN AUTHORITY.  The inability of the Company to 
obtain authority from any regulatory body having jurisdiction, which 
authority is deemed by the Company's counsel to be necessary to the lawful 
issuance and sale of any Shares hereunder, shall relieve the Company of any 
liability in respect of the failure to issue or sell such Shares as to which 
such requisite authority shall not have been obtained.

     17.  RESERVATION OF SHARES.  The Company, during the term of this Plan, 
will at all times reserve and keep available such number of Shares as shall 
be sufficient to satisfy the requirements of the Plan.

                                       -10-


<PAGE>

                            QUICKTURN DESIGN SYSTEMS, INC.

                          1997 STOCK OPTION PLAN, AS AMENDED

     1.   PURPOSES OF THE PLAN.  The purposes of this Plan are:

            -       to attract and retain the best available personnel for
                    positions of substantial responsibility, 

            -       to provide additional incentive to Employees, Directors 
                    and Consultants, and 

            -       to promote the success of the Company's business.  

     Options granted under the Plan may be Incentive Stock Options or 
Nonstatutory Stock Options, as determined by the Administrator at the time of 
grant.

     2.   DEFINITIONS.  As used herein, the following definitions shall apply:

          (a)  "ADMINISTRATOR" means the Board or any of its Committees as 
shall be administering the Plan, in accordance with Section 4 of the Plan.

          (b)  "APPLICABLE LAWS" means the requirements relating to the 
administration of stock option plans under U.S. state corporate laws, U.S. 
federal and state securities laws, the Code, any stock exchange or quotation 
system on which the Common Stock is listed or quoted and the applicable laws 
of any foreign country or jurisdiction where Options are, or will be, granted 
under the Plan.

          (c)  "BOARD" means the Board of Directors of the Company.

          (d)  "CODE" means the Internal Revenue Code of 1986, as amended.

          (e)  "COMMITTEE"  means a committee of Directors appointed by the 
Board in accordance with Section 4 of the Plan.

          (f)  "COMMON STOCK" means the common stock of the Company.

          (g)  "COMPANY" means Quickturn Design Systems, Inc., a Delaware 
corporation.

          (h)  "CONSULTANT" means any person, including an advisor, engaged 
by the Company or a Parent or Subsidiary to render services to such entity.

          (i)  "DIRECTOR" means a member of the Board.

<PAGE>

          (j)  "DISABILITY" means total and permanent disability as defined in 
Section 22(e)(3) of the Code.
                                       
          (k)  "EMPLOYEE" means any person, including Officers and Directors, 
employed by the Company or any Parent or Subsidiary of the Company.  A 
Service Provider shall not cease to be an Employee in the case of (i) any 
leave of absence approved by the Company or (ii) transfers between locations 
of the Company or between the Company, its Parent, any Subsidiary, or any 
successor. For purposes of Incentive Stock Options, no such leave may exceed 
ninety days, unless reemployment upon expiration of such leave is guaranteed 
by statute or contract.  If reemployment upon expiration of a leave of 
absence approved by the Company is not so guaranteed, on the 181st day of 
such leave any Incentive Stock Option held by the Optionee shall cease to be 
treated as an Incentive Stock Option and shall be treated for tax purposes as 
a Nonstatutory Stock Option. Neither service as a Director nor payment of a 
director's fee by the Company shall be sufficient to constitute "employment" 
by the Company.

          (l)  "EXCHANGE ACT" means the Securities Exchange Act of 1934, as 
amended.

          (m)  "FAIR MARKET VALUE" means, as of any date, the value of Common 
Stock determined as follows:

               (i)    If the Common Stock is listed on any established stock 
exchange or a national market system, including without limitation the Nasdaq 
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, the 
Fair Market Value of a Share of Common Stock shall be the closing sales price 
for such stock (or the closing bid, if no sales were reported) as quoted on 
such exchange or system for the last market trading day prior to the time of 
determination, as reported in THE WALL STREET JOURNAL or such other source as 
the Administrator deems reliable;

               (ii)   If the Common Stock is regularly quoted by a recognized 
securities dealer but selling prices are not reported, the Fair Market Value 
of a Share of Common Stock shall be the mean between the high bid and low 
asked prices for the Common Stock on the last market trading day prior to the 
day of determination, as reported in THE WALL STREET JOURNAL or such other 
source as the Administrator deems reliable; or 

               (iii)  In the absence of an established market for the Common 
Stock, the Fair Market Value shall be determined in good faith by the 
Administrator.

          (n)  "INCENTIVE STOCK OPTION" means an Option intended to qualify 
as an incentive stock option within the meaning of Section 422 of the Code 
and the regulations promulgated thereunder.

          (o)  "NONSTATUTORY STOCK OPTION" means an Option not intended to 
qualify as an Incentive Stock Option.

                                       -2-

<PAGE>

          (p)  "NOTICE OF GRANT" means a written or electronic notice 
evidencing certain terms and conditions of an individual Option grant.  The 
Notice of Grant is part of the Option Agreement.

          (q)  "OFFICER" means a person who is an officer of the Company 
within the meaning of Section 16 of the Exchange Act and the rules and 
regulations promulgated thereunder.

          (r)  "OPTION" means a stock option granted pursuant to the Plan.

          (s)  "OPTION AGREEMENT" means an agreement between the Company and 
an Optionee evidencing the terms and conditions of an individual Option 
grant.  The Option Agreement is subject to the terms and conditions of the 
Plan.

          (t)  "OPTION EXCHANGE PROGRAM" means a program whereby outstanding 
Options are surrendered in exchange for Options with a lower exercise price.

          (u)  "OPTIONED STOCK" means the Common Stock subject to an Option 
or Stock Purchase Right.

          (v)  "OPTIONEE" means the holder of an outstanding Option or Stock 
Purchase Right granted under the Plan.

          (w)  "PARENT" means a "parent corporation," whether now or 
hereafter existing, as defined in Section 424(e) of the Code.

          (x)  "PLAN" means this 1997 Stock Option Plan, as amended.

          (y)  "RULE 16b-3" means Rule 16b-3 of the Exchange Act or any 
successor to Rule 16b-3, as in effect when discretion is being exercised with 
respect to the Plan.

          (z)  "SECTION 16(b)" means Section 16(b) of the Exchange Act.

          (aa) "SERVICE PROVIDER" means an Employee, Director or Consultant.

          (bb) "SHARE" means a share of the Common Stock, as adjusted in 
accordance with Section 12 of the Plan.

          (cc) "SUBSIDIARY" means a "subsidiary corporation," whether now or 
hereafter existing, as defined in Section 424(f) of the Code.

     3.   STOCK SUBJECT TO THE PLAN.  Subject to the provisions of Section 12 
of the Plan, the maximum aggregate number of Shares which may be optioned and 
sold under the Plan is 1,000,000 Shares.  The Shares may be authorized, but 
unissued, or reacquired Common Stock.  


                                       -3-

<PAGE>
          If an Option expires or becomes unexercisable without having been 
exercised in full, or is surrendered pursuant to an Option Exchange Program, 
the unpurchased Shares which were subject thereto shall become available for 
future grant or sale under the Plan (unless the Plan has terminated); 
PROVIDED, however, that Shares that have actually been issued under the Plan 
shall not be returned to the Plan and shall not become available for future 
distribution under the Plan.

     4.   ADMINISTRATION OF THE PLAN.

          (a)  PROCEDURE.

               (i)    MULTIPLE ADMINISTRATIVE BODIES.  The Plan may be 
administered by different Committees with respect to different groups of 
Service Providers.

               (ii)   SECTION 162(m). To the extent that the Administrator 
determines it to be desirable to qualify Options granted hereunder as 
"performance-based compensation" within the meaning of Section 162(m) of the 
Code, the Plan shall be administered by a Committee of two or more "outside 
directors" within the meaning of Section 162(m) of the Code.

               (iii)  RULE 16b-3.  To the extent desirable to qualify 
transactions hereunder as exempt under Rule 16b-3, the transactions 
contemplated hereunder shall be structured to satisfy the requirements for 
exemption under Rule 16b-3.

               (iv)   OTHER ADMINISTRATION.  Other than as provided above, 
the Plan shall be administered by (A) the Board or (B) a Committee, which 
committee shall be constituted to satisfy Applicable Laws. 

          (b)  POWERS OF THE ADMINISTRATOR.  Subject to the provisions of the 
Plan, and in the case of a Committee, subject to the specific duties 
delegated by the Board to such Committee, the Administrator shall have the 
authority, in its discretion:

               (i)    to determine the Fair Market Value;

               (ii)   to select the Service Providers to whom Options may be 
granted hereunder;

               (iii)  to determine the number of shares of Common Stock to be 
covered by each Option granted hereunder;

               (iv)   to approve forms of agreement for use under the Plan;

               (v)    to determine the terms and conditions, not inconsistent 
with the terms of the Plan, of any Option granted hereunder.  Such terms and 
conditions include, but are not limited to, the exercise price, the time or 
times when Options may be exercised (which may be based on performance 
criteria), any vesting acceleration or waiver of forfeiture restrictions, and 
any restriction 


                                       -4-

<PAGE>

or limitation regarding any Option of the shares of Common Stock relating 
thereto, based in each case on such factors as the Administrator, in its sole 
discretion, shall determine;

               (vi)   to reduce the exercise price of any Option to the then 
current Fair Market Value if the Fair Market Value of the Common Stock 
covered by such Option shall have declined since the date the Option was 
granted, provided that no such action shall be taken unless and until the 
approval of the Company's stockholders shall have been obtained;

               (vii)  to institute an Option Exchange Program, provided that 
no such action shall be taken unless and until the approval of the Company's 
stockholders shall have been obtained;

               (viii) to construe and interpret the terms of the Plan and 
awards granted pursuant to the Plan;

               (ix)   to prescribe, amend and rescind rules and regulations 
relating to the Plan, including rules and regulations relating to sub-plans 
established for the purpose of qualifying for preferred tax treatment under 
foreign tax laws;

               (x)    to modify or amend each Option (subject to Section 
14(c) of the Plan), including the discretionary authority to extend the 
post-termination exercisability period of Options longer than is otherwise 
provided for in the Plan;

               (xi)   to allow Optionees to satisfy withholding tax 
obligations by electing to have the Company withhold from the Shares to be 
issued upon exercise of an Option that number of Shares having a Fair Market 
Value equal to the amount required to be withheld.  The Fair Market Value of 
the Shares to be withheld shall be determined on the date that the amount of 
tax to be withheld is to be determined.  All elections by an Optionee to have 
Shares withheld for this purpose shall be made in such form and under such 
conditions as the Administrator may deem necessary or advisable;

               (xii)  to authorize any person to execute on behalf of the 
Company any instrument required to effect the grant of an Option previously 
granted by the Administrator;

               (xiii) to make all other determinations deemed necessary or 
advisable for administering the Plan.

          (c)  EFFECT OF ADMINISTRATOR'S DECISION.  The Administrator's 
decisions, determinations and interpretations shall be final and binding on 
all Optionees and any other holders of Options.

     5.   ELIGIBILITY.  Nonstatutory Stock Options may be granted to Service 
Providers.  Incentive Stock Options may be granted only to Employees.


                                       -5-

<PAGE>
     6.   LIMITATIONS.

          (a)  Each Option shall be designated in the Option Agreement as 
either an Incentive Stock Option or a Nonstatutory Stock Option.  However, 
notwithstanding such designation, to the extent that the aggregate Fair 
Market Value of the Shares with respect to which Incentive Stock Options are 
exercisable for the first time by the Optionee during any calendar year 
(under all plans of the Company and any Parent or Subsidiary) exceeds 
$100,000, such Options shall be treated as Nonstatutory Stock Options.  For 
purposes of this Section 6(a), Incentive Stock Options shall be taken into 
account in the order in which they were granted.  The Fair Market Value of 
the Shares shall be determined as of the time the Option with respect to such 
Shares is granted.

          (b)  Neither the Plan nor any Option shall confer upon an Optionee 
any right with respect to continuing the Optionee's relationship as a Service 
Provider with the Company, nor shall they interfere in any way with the 
Optionee's right or the Company's right to terminate such relationship at any 
time, with or without cause.

          (c)  The following limitations shall apply to grants of Options:

               (i)    No Service Provider shall be granted, in any fiscal 
year of the Company, Options to purchase more than 200,000 Shares.

               (ii)   In connection with his or her initial service, a 
Service Provider may be granted Options to purchase up to an additional 
100,000 Shares which shall not count against the limit set forth in 
subsection (i) above.

               (iii)  The foregoing limitations shall be adjusted 
proportionately in connection with any change in the Company's capitalization 
as described in Section 12. 

               (iv)   If an Option is cancelled in the same fiscal year of 
the Company in which it was granted (other than in connection with a 
transaction described in Section 12), the cancelled Option will be counted 
against the limits set forth in subsections (i) and (ii) above.  For this 
purpose, if the exercise price of an Option is reduced, the transaction will 
be treated as a cancellation of the Option and the grant of a new Option.

     7.   TERM OF PLAN.  Subject to Section 18 of the Plan, the Plan shall 
become effective upon its adoption by the Board.  It shall continue in effect 
for a term of ten (10) years unless terminated earlier under Section 14 of 
the Plan.

     8.   TERM OF OPTION.  The term of each Option shall be stated in the 
Option Agreement.  In the case of an Incentive Stock Option, the term shall 
be ten (10) years from the date of grant or such shorter term as may be 
provided in the Option Agreement.  Moreover, in the case of an Incentive 
Stock Option granted to an Optionee who, at the time the Incentive Stock 
Option is granted, owns 


                                       -6-

<PAGE>

stock representing more than ten percent (10%) of the total combined voting 
power of all classes of stock of the Company or any Parent or Subsidiary, the 
term of the Incentive Stock Option shall be five (5) years from the date of 
grant or such shorter term as may be provided in the Option Agreement.

     9.   OPTION EXERCISE PRICE AND CONSIDERATION.

          (a)  EXERCISE PRICE.  The per share exercise price for the Shares 
to be issued pursuant to exercise of an Option shall be determined by the 
Administrator, subject to the following:

               (i)    In the case of an Incentive Stock Option

                      (A)     granted to an Employee who, at the time the 
Incentive Stock Option is granted, owns stock representing more than ten 
percent (10%) of the voting power of all classes of stock of the Company or 
any Parent or Subsidiary, the per Share exercise price shall be no less than 
110% of the Fair Market Value per Share on the date of grant.

                      (B)     granted to any Employee other than an Employee 
described in paragraph (A) immediately above, the per Share exercise price 
shall be no less than 100% of the Fair Market Value per Share on the date of 
grant.

               (ii)   In the case of a Nonstatutory Stock Option, the per 
Share exercise price shall be determined by the Administrator.  In the case 
of a Nonstatutory Stock Option intended to qualify as "performance-based 
compensation" within the meaning of Section 162(m) of the Code, the per Share 
exercise price shall be no less than 100% of the Fair Market Value per Share 
on the date of grant.

               (iii)  Notwithstanding the foregoing, Options may be granted 
with a per Share exercise price of less than 100% of the Fair Market Value 
per Share on the date of grant pursuant to a merger or other corporate 
transaction.

          (b)  WAITING PERIOD AND EXERCISE DATES.  At the time an Option is 
granted, the Administrator shall fix the period within which the Option may 
be exercised and shall determine any conditions which must be satisfied 
before the Option may be exercised. 

          (c)  FORM OF CONSIDERATION.  The Administrator shall determine the 
acceptable form of consideration for exercising an Option, including the 
method of payment.  In the case of an Incentive Stock Option, the 
Administrator shall determine the acceptable form of consideration at the 
time of grant.  Such consideration may consist entirely of:

               (i)    cash;

               (ii)   check;


                                       -7-

<PAGE>

               (iii)  promissory note;

               (iv)   other Shares which (A) in the case of Shares acquired 
upon exercise of an option, have been owned by the Optionee for more than six 
months on the date of surrender, and (B) have a Fair Market Value on the date 
of surrender equal to the aggregate exercise price of the Shares as to which 
said Option shall be exercised;

               (v)    consideration received by the Company under a cashless 
exercise program implemented by the Company in connection with the Plan;

               (vi)    a reduction in the amount of any Company liability to 
the Optionee, including any liability attributable to the Optionee's 
participation in any Company-sponsored deferred compensation program or 
arrangement;

               (vii)  any combination of the foregoing methods of payment; or

               (viii) such other consideration and method of payment for the 
issuance of Shares to the extent permitted by Applicable Laws.

     10.  EXERCISE OF OPTION.

          (a)  PROCEDURE FOR EXERCISE; RIGHTS AS A SHAREHOLDER. Any Option 
granted hereunder shall be exercisable according to the terms of the Plan and 
at such times and under such conditions as determined by the Administrator 
and set forth in the Option Agreement.  Unless the Administrator provides 
otherwise, vesting of Options granted hereunder shall be tolled during any 
unpaid leave of absence.  An Option may not be exercised for a fraction of a 
Share.

               An Option shall be deemed exercised when the Company receives: 
(i) written or electronic notice of exercise (in accordance with the Option 
Agreement) from the person entitled to exercise the Option, and (ii) full 
payment for the Shares with respect to which the Option is exercised.  Full 
payment may consist of any consideration and method of payment authorized by 
the Administrator and permitted by the Option Agreement and the Plan.  Shares 
issued upon exercise of an Option shall be issued in the name of the Optionee 
or, if requested by the Optionee, in the name of the Optionee and his or her 
spouse. Until the Shares are issued (as evidenced by the appropriate entry on 
the books of the Company or of a duly authorized transfer agent of the 
Company), no right to vote or receive dividends or any other rights as a 
shareholder shall exist with respect to the Optioned Stock, notwithstanding 
the exercise of the Option. The Company shall issue (or cause to be issued) 
such Shares promptly after the Option is exercised.  No adjustment will be 
made for a dividend or other right for which the record date is prior to the 
date the Shares are issued, except as provided in Section 12 of the Plan.

                                       -8-

<PAGE>

               Exercising an Option in any manner shall decrease the number 
of Shares thereafter available, both for purposes of the Plan and for sale 
under the Option, by the number of Shares as to which the Option is exercised.

          (b)  TERMINATION OF RELATIONSHIP AS A SERVICE PROVIDER.  If an 
Optionee ceases to be a Service Provider, other than upon the Optionee's 
death or Disability, the Optionee may exercise his or her Option within such 
period of time as is specified in the Option Agreement to the extent that the 
Option is vested on the date of termination (but in no event later than the 
expiration of the term of such Option as set forth in the Option Agreement).  
In the absence of a specified time in the Option Agreement, the Option shall 
remain exercisable for three (3) months following the Optionee's termination. 
 If, on the date of termination, the Optionee is not vested as to his or her 
entire Option, the Shares covered by the unvested portion of the Option shall 
revert to the Plan. If, after termination, the Optionee does not exercise his 
or her Option within the time specified by the Administrator, the Option 
shall terminate, and the Shares covered by such Option shall revert to the 
Plan.

          (c)  DISABILITY OF OPTIONEE.  If an Optionee ceases to be a Service 
Provider as a result of the Optionee's Disability, the Optionee may exercise 
his or her Option within such period of time as is specified in the Option 
Agreement to the extent the Option is vested on the date of termination (but 
in no event later than the expiration of the term of such Option as set forth 
in the Option Agreement).  In the absence of a specified time in the Option 
Agreement, the Option shall remain exercisable for twelve (12) months 
following the Optionee's termination.  If, on the date of termination, the 
Optionee is not vested as to his or her entire Option, the Shares covered by 
the unvested portion of the Option shall revert to the Plan.  If, after 
termination, the Optionee does not exercise his or her Option within the time 
specified herein, the Option shall terminate, and the Shares covered by such 
Option shall revert to the Plan.

          (d)  DEATH OF OPTIONEE.  If an Optionee dies while a Service 
Provider, the Option may be exercised within such period of time as is 
specified in the Option Agreement (but in no event later than the expiration 
of the term of such Option as set forth in the Notice of Grant), by the 
Optionee's estate or by a person who acquires the right to exercise the 
Option by bequest or inheritance, but only to the extent that the Option is 
vested on the date of death.  In the absence of a specified time in the 
Option Agreement, the Option shall remain exercisable for twelve (12) months 
following the Optionee's termination.  If, at the time of death, the Optionee 
is not vested as to his or her entire Option, the Shares covered by the 
unvested portion of the Option shall immediately revert to the Plan.  The 
Option may be exercised by the executor or administrator of the Optionee's 
estate or, if none, by the person(s) entitled to exercise the Option under 
the Optionee's will or the laws of descent or distribution.  If the Option is 
not so exercised within the time specified herein, the Option shall 
terminate, and the Shares covered by such Option shall revert to the Plan.

          (e)  BUYOUT PROVISIONS.  The Administrator may at any time offer to 
buy out for a payment in cash or Shares an Option previously granted based on 
such terms and conditions as the Administrator shall establish and 
communicate to the Optionee at the time that such offer is made.

                                       -9-

<PAGE>

      11.  NON-TRANSFERABILITY OF OPTIONS.  Unless determined otherwise by 
the Administrator, an Option may not be sold, pledged, assigned, 
hypothecated, transferred, or disposed of in any manner other than by will or 
by the laws of descent or distribution and may be exercised, during the 
lifetime of the Optionee, only by the Optionee.  If the Administrator makes 
an Option transferable, such Option shall contain such additional terms and 
conditions as the Administrator deems appropriate.

     12.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION, DISSOLUTION, MERGER OR  
         ASSET SALE. 

          (a)  CHANGES IN CAPITALIZATION.  Subject to any required action by 
the shareholders of the Company, the number of shares of Common Stock covered 
by each outstanding Option and the number of shares of Common Stock which 
have been authorized for issuance under the Plan but as to which no Options 
have yet been granted or which have been returned to the Plan upon 
cancellation or expiration of an Option, as well as the price per share of 
Common Stock covered by each such outstanding Option, shall be 
proportionately adjusted for any increase or decrease in the number of issued 
shares of Common Stock resulting from a stock split, reverse stock split, 
stock dividend, combination or reclassification of the Common Stock, or any 
other increase or decrease in the number of issued shares of Common Stock 
effected without receipt of consideration by the Company; provided, however, 
that conversion of any convertible securities of the Company shall not be 
deemed to have been "effected without receipt of consideration." Such 
adjustment shall be made by the Board, whose determination in that respect 
shall be final, binding and conclusive.  Except as expressly provided herein, 
no issuance by the Company of shares of stock of any class, or securities 
convertible into shares of stock of any class, shall affect, and no 
adjustment by reason thereof shall be made with respect to, the number or 
price of shares of Common Stock subject to an Option.

          (b)  DISSOLUTION OR LIQUIDATION.  In the event of the proposed 
dissolution or liquidation of the Company, the Administrator shall notify 
each Optionee as soon as practicable prior to the effective date of such 
proposed transaction.  The Administrator in its discretion may provide for an 
Optionee to have the right to exercise his or her Option until ten (10) days 
prior to such transaction as to all of the Optioned Stock covered thereby, 
including Shares as to which the Option would not otherwise be exercisable.  
In addition, the Administrator may provide that any Company repurchase option 
applicable to any Shares purchased upon exercise of an Option shall lapse as 
to all such Shares, provided the proposed dissolution or liquidation takes 
place at the time and in the manner contemplated.  To the extent it has not 
been previously exercised, an Option will terminate immediately prior to the 
consummation of such proposed action.

          (c)  MERGER OR ASSET SALE.  In the event of a merger of the Company 
with or into another corporation, or the sale of substantially all of the 
assets of the Company, each outstanding Option shall be assumed or an 
equivalent option or right substituted by the successor corporation or a 
Parent or Subsidiary of the successor corporation.  In the event that the 
successor corporation refuses to assume or substitute for the Option, the 
Optionee shall fully vest in and have the right to exercise the Option as to 
all of the Optioned Stock, including Shares as to which it would not 
otherwise be vested or exercisable.  If an Option becomes fully vested and 
exercisable in lieu of assumption or 


                                       -10-

<PAGE>

substitution in the event of a merger or sale of assets, the Administrator 
shall notify the Optionee in writing or electronically that the Option shall 
be fully vested and exercisable for a period of fifteen (15) days from the 
date of such notice, and the Option shall terminate upon the expiration of 
such period.  For the purposes of this paragraph, the Option shall be 
considered assumed if, following the merger or sale of assets, the option or 
right confers the right to purchase or receive, for each Share of Optioned 
Stock subject to the Option immediately prior to the merger or sale of 
assets, the consideration (whether stock, cash, or other securities or 
property) received in the merger or sale of assets by holders of Common Stock 
for each Share held on the effective date of the transaction (and if holders 
were offered a choice of consideration, the type of consideration chosen by 
the holders of a majority of the outstanding Shares); provided, however, that 
if such consideration received in the merger or sale of assets is not solely 
common stock of the successor corporation or its Parent, the Administrator 
may, with the consent of the successor corporation, provide for the 
consideration to be received upon the exercise of the Option, for each Share 
of Optioned Stock subject to the Option, to be solely common stock of the 
successor corporation or its Parent equal in fair market value to the per 
share consideration received by holders of Common Stock in the merger or sale 
of assets.

     13.  DATE OF GRANT.  The date of grant of an Option shall be, for all 
purposes, the date on which the Administrator makes the determination 
granting such Option, or such other later date as is determined by the 
Administrator. Notice of the determination shall be provided to each Optionee 
within a reasonable time after the date of such grant.

     14.  AMENDMENT AND TERMINATION OF THE PLAN.

          (a)  AMENDMENT AND TERMINATION.  The Board may at any time amend, 
alter, suspend or terminate the Plan.  

          (b)  SHAREHOLDER APPROVAL.  The Company shall obtain shareholder 
approval of any Plan amendment to the extent necessary and desirable to 
comply with Applicable Laws. 

          (c)  EFFECT OF AMENDMENT OR TERMINATION.  No amendment, alteration, 
suspension or termination of the Plan shall impair the rights of any 
Optionee, unless mutually agreed otherwise between the Optionee and the 
Administrator, which agreement must be in writing and signed by the Optionee 
and the Company. Termination of the Plan shall not affect the Administrator's 
ability to exercise the powers granted to it hereunder with respect to 
Options granted under the Plan prior to the date of such termination.

                                       -11-

<PAGE>

     15.  CONDITIONS UPON ISSUANCE OF SHARES.  

          (a)  LEGAL COMPLIANCE.  Shares shall not be issued pursuant to the 
exercise of an Option unless the exercise of such Option and the issuance and 
delivery of such Shares shall comply with Applicable Laws and shall be 
further subject to the approval of counsel for the Company with respect to 
such compliance.

          (b)  INVESTMENT REPRESENTATIONS.  As a condition to the exercise of 
an Option, the Company may require the person exercising such Option to 
represent and warrant at the time of any such exercise that the Shares are 
being purchased only for investment and without any present intention to sell 
or distribute such Shares if, in the opinion of counsel for the Company, such 
a representation is required.

     16.  INABILITY TO OBTAIN AUTHORITY.  The inability of the Company to 
obtain authority from any regulatory body having jurisdiction, which 
authority is deemed by the Company's counsel to be necessary to the lawful 
issuance and sale of any Shares hereunder, shall relieve the Company of any 
liability in respect of the failure to issue or sell such Shares as to which 
such requisite authority shall not have been obtained.

     17.  RESERVATION OF SHARES.  The Company, during the term of this Plan, 
will at all times reserve and keep available such number of Shares as shall 
be sufficient to satisfy the requirements of the Plan.

     18.  SHAREHOLDER APPROVAL.  The Plan shall be subject to approval by the 
shareholders of the Company within twelve (12) months after the date the Plan 
is adopted.  Such shareholder approval shall be obtained in the manner and to 
the degree required under Applicable Laws.


                                       -12-



<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET, CONSOLIDATED STATEMENT OF OPERATIONS AND
CONSOLIDATED STATEMENT OF CASH FLOWS INCLUDED IN THE COMPANY'S FORM 10-Q FOR THE
PERIOD ENDED SEPTEMBER 30, 1998, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          25,182
<SECURITIES>                                    12,610
<RECEIVABLES>                                   19,326
<ALLOWANCES>                                     1,840
<INVENTORY>                                      6,932
<CURRENT-ASSETS>                                74,907
<PP&E>                                          33,756
<DEPRECIATION>                                  20,918
<TOTAL-ASSETS>                                 118,070
<CURRENT-LIABILITIES>                           33,214
<BONDS>                                              0
                                0
                                          0
<COMMON>                                            18
<OTHER-SE>                                      84,838
<TOTAL-LIABILITY-AND-EQUITY>                   118,070
<SALES>                                         73,089
<TOTAL-REVENUES>                                73,089
<CGS>                                           29,049
<TOTAL-COSTS>                                   29,049
<OTHER-EXPENSES>                                59,900
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 130
<INCOME-PRETAX>                               (13,639)
<INCOME-TAX>                                   (5,592)
<INCOME-CONTINUING>                            (8,047)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (8,047)
<EPS-PRIMARY>                                  ($0.45)
<EPS-DILUTED>                                  ($0.45)
        

</TABLE>


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