SUMMIT DESIGN INC
10-Q, 1997-11-14
PREPACKAGED SOFTWARE
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<PAGE>
                                       
                                UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                                       
                                  FORM 10-Q
                                       
                                       
                                       
- -------------------------------------------------------------------------------
X   Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange
    Act of 1934 for the quarterly period ended September 30, 1997 or
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
    Transition report pursuant to Section 13 or 15(d) of the Securities
    Exchange Act of 1934 for the transition period from _________ to ________ 
- -------------------------------------------------------------------------------

Commission file number:  0-20923
    
    
                                       
                              SUMMIT DESIGN, INC.
             (Exact name of registrant as specified in its charter)

               DELAWARE                               93-1137888
   (State or other jurisdiction of     (I.R.S. Employer Identification Number)
    incorporation or organization)

                               9305 S. W. GEMINI DRIVE,
                               BEAVERTON, OREGON  97008
                       (Address of principal executive office)
         Registrant's Telephone number, including area code:  (503) 643-9281

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 November 4, 1997, the Registrant had outstanding 14,655,899 shares of 
Common Stock.

<PAGE>

                            SUMMIT DESIGN, INC.
                                   INDEX
                                      
                                      
                                      
PART I   FINANCIAL INFORMATION

Item 1  Condensed Consolidated Financial Statements

        Condensed Consolidated Balance Sheet as of September 30, 1997 
        (unaudited) and December 31, 1996.                                    3

        Condensed Consolidated Statements of Operations for the 
        three month and nine month periods ended September 30, 1997 
        and 1996 (unaudited).                                                 4

        Condensed Consolidated Statements of Cash Flows for
        the nine month periods ended September 30, 1997 and 1996 (unaudited). 5

        Notes to Condensed Consolidated Financial Statements.                 6

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

Item 3  Not Applicable

PART II  OTHER INFORMATION

Item 2  Changes in Securities and Use of Proceeds                            27

Item 6  Exhibits and Reports on Form 8-K                                     27

Item 1 and Item 3 through Item 5       Not Applicable 

Signature                                                                    28

Exhibit Index                                                                29


                                      -2-
<PAGE>

                              SUMMIT DESIGN, INC.
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (in thousands)
                                       

<TABLE>
<CAPTION>
                                           September 30, 1997     December 31, 1996
                                           ------------------     -----------------
                                                  (Unaudited)
<S>                                        <C>                    <C>

               ASSETS
Current assets:
  Cash and cash equivalents .............           $  17,224             $  19,772
  Accounts receivable, net ..............               5,218                 5,567
  Prepaid expenses and other ............                 519                   487
                                           ------------------     -----------------
    Total current assets ................              22,961                25,826
  
Furniture and equipment, net ............               2,577                 1,832
Notes receivable from related parties ...                 490                     -
Purchased technology, net ...............               1,018                     -
Intangibles, net ........................                 727                     -
Deferred taxes ..........................               1,037                   500
Deposits and other assets ...............                 496                   468
                                           ------------------     -----------------
    Total assets ........................           $  29,306             $  28,626
                                           ------------------     -----------------
                                           ------------------     -----------------

             LIABILITIES
Current liabilities:
  Long-term debt, current portion .......           $     391             $     462
  Capital lease obligation, current 
  portion ...............................                  41                    65
  Accounts payable ......................               1,893                 1,454
  Accrued liabilities ...................               5,247                 2,869
  Deferred revenue ......................               5,033                 3,758
                                           ------------------     -----------------
    Total current liabilities ...........              12,605                 8,608

Long-term debt, less current portion ....                 675                   675
Capital lease obligations, less          
current portion .........................                  59                    95
Deferred revenue, less current portion ..                 333                    67

                                           ------------------     -----------------
    Total liabilities ...................              13,672                 9,445
                                           ------------------     -----------------

Commitments and contingencies

        STOCKHOLDERS' EQUITY
Common stock, $.01 par value.   
   Authorized 30,000 shares;  issued
   and outstanding 14,656  shares at
   September 30, 1997 and 13,873 shares    
   at December 31, 1996..................                 146                   139
Additional paid-in capital ..............              50,585                33,235
Accumulated deficit .....................            (23,552)              (14,193)
Treasury stock .   939 shares at  
   September 30, 1997 ...................            (11,545)                     -
                                           ------------------     -----------------
    Total stockholders' equity ..........              15,634                19,181
                                           ------------------     -----------------
    Total liabilities and 
    stockholders' equity ................           $  29,306             $  28,626
                                           ------------------     -----------------
                                           ------------------     -----------------
</TABLE>
                                       
       The accompanying notes are an integral part of the condensed 
                       consolidated financial statements


                                      -3-

<PAGE>
                                       
                             SUMMIT DESIGN, INC.
              CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                   (In thousands, except per share data)
                                (Unaudited)

<TABLE>
<CAPTION>
                                                Three Months               Nine Months
                                                    Ended                      Ended
                                                September 30,              September 30,
                                           ---------------------     ----------------------
                                              1997        1996          1997         1996
                                           ----------   --------     ----------   ---------
<S>                                         <C>         <C>           <C>          <C>
Revenue:
     Product licenses.....................  $  6,430    $ 3,801       $ 16,884     $10,992
     Maintenance and services.............     1,345      1,167          4,244       3,062
     Other................................        91        141            358         425
                                           ----------   --------     ----------   ---------
          Total revenue...................     7,866      5,109         21,486      14,479

Cost of revenue:
     Product licenses.....................       184        156            533         434
     Maintenance and services.............       171        122            421         333
                                           ----------   --------     ----------   ---------
          Total cost of revenue...........       355        278            954         767
                                           ----------   --------     ----------   ---------
               Gross profit...............     7,511      4,831         20,532      13,712
                                           ----------   --------     ----------   ---------

Operating expenses:
     Research and development.............     1,611      1,453          4,698       4,310
     Sales and marketing..................     2,690      2,357          7,778       6,761
     General and administrative...........       959        785          3,014       2,329
     In-process technology................    19,937          -         19,937           - 
                                           ----------   --------     ----------   ---------
          Total operating expenses........    25,197      4,595         35,427      13,400
                                           ----------   --------     ----------   ---------

Income (loss) from operations.............  (17,686)        236       (14,895)         312

Interest expense..........................       (1)       (17)           (10)        (93)
Other income, net.........................       348         27            797          49
Gain on sale of TDS product line..........     5,569          -          5,569           - 
                                           ----------   --------     ----------   ---------
Income (loss) before income taxes.........  (11,770)        246        (8,539)         268
Income tax provision......................       640         34            820         243
                                           ----------   --------     ----------   ---------
Net income (loss)......................... $(12,410)    $   212       $(9,359)    $     25
                                           ----------   --------     ----------   ---------
                                           ----------   --------     ----------   ---------
Net income (loss) per share................ $ (0.87)    $  0.02       $ (0.67)    $ (0.00)
                                           ----------   --------     ----------   ---------
                                           ----------   --------     ----------   ---------
Number of shares used in per share
calculation...............................    14,250      12,959         14,039      12,608
</TABLE>

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

                                    -4-
<PAGE>
                             SUMMIT DESIGN, INC.
               CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                (In thousands)
                                 (Unaudited)
<TABLE>
<CAPTION>
                                                             Nine Months Ended
                                                               September 30,
                                                           -----------------------
                                                             1997          1996
                                                           ---------     ---------
<S>                                                      <C>             <C>
Cash flows from operating activities:
   Net income (loss).................................... $   (9,359)        $  25
   Adjustments to reconcile net income (loss) to net 
     cash provided by operating activities:
       Depreciation and amortization....................        624           663
       Gain on sale of TDS product line.................     (5,569)            -
       Writeoff of acquired in-process technology.......     19,937             -
       Loss on asset disposition........................         (1)            5
       Changes in assets and liabilities:
           Accounts receivable..........................        855         1,403
           Prepaid expenses and other...................          5           (99)
           Accounts payable.............................        434           (65)
           Accrued liabilities..........................      1,742           557
           Deferred revenue.............................      1,294         1,081
           Deferred taxes...............................        537             -
           Other, net...................................        (76)          194
                                                           ---------     ---------
    Net cash provided by operating activities...........      9,349         3,764
                                                           ---------     ---------
Cash flows from investing activities:
    Additions to furniture and equipment................     (1,252)         (553)
    Acquisitons, net of cash received...................     (3,819)            -
    Proceeds from sale of TDS product line, net.........      4,643             -
    Proceeds from sale of assets........................          8             6
    Notes receivable from related parties...............       (490)            -
    Invest in Joint Venture.............................          -          (100)
                                                           ---------     ---------
       Net cash used in investing activities............       (910)         (647)
                                                           ---------     ---------
Cash flows from financing activities:
    Issuance of common stock, net of issuance costs             700           119
    Payments to acquire treasury stock..................    (11,555)            -
    Issuance of TriQuest Preferred Stock................          -           986
    Stock issuance costs................................          -           674
    Repurchase of common stock..........................          -            (2)
    Proceeds from long-term debt........................          -            73
    Short term borrowings...............................          -          (164)
    Principal payments of debt obligations..............        (71)         (347)
    Principal payments of capital lease obligations.....        (61)       (1,050)
                                                           ---------     ---------
       Net cash used in financing activities............    (10,987)       (1,059)
                                                           ---------     ---------
       Increase (decrease) in cash and cash 
         equivalents....................................     (2,548)        2,058

Cash and cash equivalents, beginning of period..........     19,772           704
                                                           ---------     ---------
Cash and cash equivalents, end of period................   $ 17,224     $   2,762 
                                                           ---------     ---------
                                                           ---------     ---------
Supplemental disclosure of cash flow information:
    Cash paid during the period for:
       Interest.........................................   $     10      $     64
       Income taxes.....................................        104           188
Supplemental disclosure of non-cash investing
 and financing activities:
       Equipment acquired under capital lease...........          -            23
Acquisition, net of cash acquired:
    Net current assets, other than cash acquired........   $ (1,600)
    Furniture and equipment.............................        377
    In-process technology...............................     19,937
    Purchased technology and intangibles................      1,772
    Stock issued........................................    (16,667)
    Cash used, net of cash acquired.....................     (3,819)
</TABLE>

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

                                    -5-
<PAGE>

                              SUMMIT DESIGN, INC.
                 Notes to Condensed Consolidated Financial Statements
                                  (Unaudited)
                                           

1.  BASIS OF PRESENTATION

The accompanying unaudited financial statements have been prepared by Summit 
Design, Inc. ("the Company") in accordance with the rules and regulations of 
the Securities and Exchange commission.  Certain information and footnote 
disclosures normally included in financial statements prepared in accordance 
with generally accepted accounting principles have been condensed or omitted 
in accordance with such rules and regulations.  The December 31, 1996 balance 
sheet was derived from the audited financial statements but does not include 
all of the disclosures required by generally accepted accounting principles. 
In the opinion of management, the accompanying unaudited financial statements 
reflect all adjustments, consisting only of normal recurring adjustments, 
necessary to present fairly the financial position of the Company, and its 
results of operations and cash flows.  These financial statements should be 
read in conjunction with the audited financial statements and notes thereto 
for the years ended December 31, 1996, 1995, and 1994 included in the 
Company's Form 10-K filed for December 31, 1996.

The results of operations for the nine months ended September 30, 1997 are 
not necessarily indicative of the results that may be expected for the year 
ended December 31, 1997 or any other future interim period, and the Company 
makes no representations related thereto.

2.  ACQUISITION OF TRIQUEST DESIGN AUTOMATION, INC.

On February 28, 1997, the Company acquired TriQuest Design Automation, Inc., 
a California corporation (TriQuest").  TriQuest develops hardware description 
language ("HDL") analysis, optimization and verification tools for the design 
of high performance, deep submicron integrated circuits.  The aggregate 
consideration for the acquisition (including shares of common stock reserved 
for issuance upon exercise of TriQuest options assumed by the Company) was 
775,000 shares of common stock.  The transaction was accounted for as a 
"pooling of interests" in accordance with generally accepted accounting 
principles.  In compliance with such principles, the Company's operating 
results have been restated to include the results of TriQuest as if the 
acquisition had occurred at the beginning of the first period presented.

The following presents the previously separate results of operations of 
TriQuest for the year ended December 31, 1996 and for the two months ended 
February 28, 1997:

                                 December 31, 1997     February 28, 1997
                                 -----------------     -----------------
                                  (In thousands, except per share data)

      Revenues                       $   151               $   199
                                     -------               -------
                                     -------               -------
      Net loss                       $ 1,425               $   143
                                     -------               -------
                                     -------               -------

3.  SALE OF TDS PRODUCT LINE

On July 11, 1997 the Company sold substantially all of the assets used in its 
business of developing and marketing its Test Development Series "TDS" 
Products (the "Asset Sale") to Credence Systems Corporation ("CSC") for $5 
million.  CSC assumed certain liabilities, including the Company's 
obligations under TDS maintenance contracts entered into prior to the 
closing.  CSC also agreed to purchase $2 million of Visual interface licenses 
in the second quarter of 1997.  TDS product license, maintenance and services 
and other revenue for the three months ended September 30, 1997 and 1996 were 
$0 and $1,758,000, respectively, and for the nine months ended September 30, 
1997 and 1996 were $3,530,000 and $5,400,000, respectively, and $7,331,000 
for the year ended December 31, 1996.

The Company and CSC also entered into a Software OEM License agreement ("OEM 
Agreement") in which CSC agreed to purchase $16 million of Visual Testbench 
licenses over a thirty-month period beginning July 1997 subject to specified 
quarterly maximums and certain additional conditions. Additionally CSC 
entered into an 18 month maintenance agreement beginning July 1997 for $2 
million associated with the Visual Testbench product.

                                -6-

<PAGE>


                              SUMMIT DESIGN, INC.
                 Notes to Condensed Consolidated Financial Statements
                                  (Unaudited)
                                           
4.  ACQUISITION OF SIMULATION TECHNOLOGIES CORP.

On September 9, 1997, the Company acquired Simulation Technologies Corp. 
("SimTech"), a Minnesota Corporation.  SimTech develops and distributes 
hardware-software co-verification, code coverage and HDL debugging software. 
The aggregate consideration for the acquisition (including shares of common 
stock reserved for issuance upon exercise of SimTech options assumed by the 
Company) was 1,980,000 shares of Summit common stock valued at $16,667,000 
and $3,875,000 in cash. The transaction was accounted for using the purchase 
method of accounting. Accordingly, the results of operations for the period 
from September 9, 1997 are included in the consolidated financial statements. 
 The purchase price was allocated to the net assets acquired based on their 
estimated fair market values at the date of acquisition.  The fair value of 
tangible assets acquired and liabilities assumed were $1.3 million and $2.1 
million, respectively.  In addition, $19.9 million was allocated to 
in-process technology which had not reached technological feasibility and had 
no probable alternative uses, which the Company expensed as of the 
acquisition date.  The remainder of the purchase price was allocated to 
Purchased technology ($1,037,000) and identifiable intangibles ($735,000), 
which are being amortized on a straight-line basis over three and five years 
respectively.

The following table reflects unaudited pro forma combined results of 
operations of the Company and SimTech on a basis that the acquisition had 
taken place at the beginning of the fiscal year for each of the periods 
presented, excluding the effect of the one time charge of in-process 
technology:

                                 December 31, 1996     September 30, 1997
                                 -----------------     -----------------
                                  (In thousands, except per share data)

      Revenues                      $ 24,038              $ 25,325
                                    --------              --------
                                    --------              --------
      Net Income                    $  2,872              $  8,409
                                    --------              --------
                                    --------              --------
      Net income per common share   $   0.21              $   0.53
                                    --------              --------
                                    --------              --------
      Number of shares used in
         per share calculation        13,629                15,827
                                    --------              --------
                                    --------              --------

In management's opinion, the unaudited pro forma combined results of 
operations are not indicative of the actual results that would have occurred 
had the acquisition been consummated at the beginning of 1996 or at the 
beginning of 1997 or under the ownership and management of the Company.

In connection with this transaction the Company also repurchased 939,000 
shares of Summit common stock in private transactions at an average price of 
$12.30 per share for an aggregate of $11,555,000 in cash.

5.  NOTE RECEIVABLE

In July 1997, the Company entered into an agreement to lend up to $2.5 
million to an independent software development company pursuant to a secured 
loan agreement. Borrowings under this agreement bear interest at prime rate 
plus 2%.

6.  BALANCE SHEET COMPONENTS, (IN THOUSANDS)

                                           September 30, 1997  December 31, 1996
                                           ------------------  -----------------
                                               (Unaudited)

Accounts Receivable:
  Trade receivables.......................   $   5,667          $    6,000 
  Less allowance for doubtful accounts....        (449)               (433)
                                           ------------------  -----------------
                                             $   5,218          $    5,567
                                           ------------------  -----------------
                                           ------------------  -----------------
Furniture and equipment:
  Office furniture equipment.............    $       530        $      513
  Computer equipment.....................          4,401             3,124
  Leasehold improvements.................             66                41
  In-process assets......................            102                -  
                                           ------------------  -----------------
                                                   5,099             3,678  
Less: accumulated depreciation...........         (2,522)           (1,846)
                                           ------------------  -----------------
                                              $    2,577        $    1,832
                                           ------------------  -----------------
                                           ------------------  -----------------


                                      -7-

<PAGE>

                                 SUMMIT DESIGN, INC.
                 Notes to Condensed Consolidated Financial Statements
                                     (Unaudited)
                                           



Accrued expenses:
  Commissions payable....................     $       46         $     173
  Payroll and related benefits...........          2,314             1,610
  Accrued management relocation costs....            160                24
  Accounting and legal...................            418               301
  Federal and state income taxes payable.          1,256                18
  Sales taxes payable....................            117                96
  Other..................................            936               647
                                           ------------------  -----------------
     Total accrued expenses..............     $    5,247         $   2,869
                                           ------------------  -----------------
                                           ------------------  -----------------
Long-term debt:
  Marketing grant payable to the Israeli      $      364         $     364
    government Chief Scientist grant
    payable to the Israeli government....            702               773
                                           ------------------  -----------------
Total long-term debt.....................          1,066             1,137
Less current portion.....................           (391)             (462)
                                           ------------------  -----------------
Non current portion......................      $     675       $       675
                                           ------------------  -----------------
                                           ------------------  -----------------


7.  IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS

During February 1997, the Financial Accounting Standards Board ("FASB") 
issued Statement of Financial Accounting Standards No. 128, "Earnings Per 
Share" ("SFAS 128") and Statement of Financial Accounting Standards No. 129  
"Disclosure of Information about Capital Structure" ("SFAS 129"), which are 
effective for the Company's 1997 fiscal year.  The Company's management has 
studied the implications of SFAS 128 and SFAS 129, and based on the initial 
evaluation, does not expect the adoption to have a material impact on the 
Company's financial condition or results of operations.

In June 1997, FASB issued SFAS No. 130, "Comprehensive Income" SFAS No. 130 
becomes effective in 1998 and requires reclassification of earlier financial 
statements for comparative purposes.  SFAS No. 130 requires that changes in 
the amounts of certain items, including foreign currency translation 
adjustments and gains and losses on certain securities be shown in the 
financial statements. SFAS No. 130 does not require a specific format for the 
financial statement in which comprehensive income is reported, but does 
require that an amount representing total comprehensive income be reported in 
that statement. Management has not yet determined the effect, if any, of SFAS 
No. 130 on the consolidated financial statements.

Also in June 1997, the FASB issued SFAS No. 131, "Disclosures about Segments 
of an Enterprise and Related Information."  This Statement will change the 
way public companies report information about segments of their business in 
their annual financial statements and requires them to report selected 
segment information in their quarterly reports issued to shareholders.  It 
also requires entity-wide disclosures about the products and services an 
entity provides, the material countries in which it holds assets and reports 
revenues, and its major customers.  The Statement is effective for fiscal 
years beginning after December 15, 1997.  Management has no yet determined 
the effect, if any, of SFAS No.131 on the consolidated financial statements.

In October 1997, the AICPA issued SOP 97-2, "Software Revenue Recognition", 
which supersedes SOP 91-1 and is effective for transactions entered into in 
years beginning after December 15, 1997. Management is currently studying the 
implications of this Statement and does not expect adoption to have a material 
impact on the Company's financial condition or results of operations.


                                  -8-

<PAGE>



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

IMPORTANT NOTE ABOUT FORWARD LOOKING STATEMENTS

The following discussion contains forward looking statements within the 
meaning of Section 27A of the Securities Act of 1933 and Section 21E of the 
Securities Exchange Act of 1934.  Predictions of future events are inherently 
uncertain. Actual events could differ materially from those predicted in the 
forward looking statements as a result of the risks set forth in the 
following discussion, and, in the particular, the risks discussed below under 
the subheading "Additional Risk Factors that Could Affect Operating Results 
and Market Price of Stock."

OVERVIEW

Summit was founded in December 1993 to act as the holding company for Test 
Systems Strategies, Inc. ("TSSI") and SEE Technologies Software Environment 
for Engineers Ltd. ("SEE Technologies"), (now Summit Design (EDA) Ltd.) 
(collectively , the "Reorganization").  TSSI was founded in 1979 to develop 
and market integrated circuit ("IC" or "chip") manufacturing test products. 
In January 1993, TSSI retained a new Chief Executive Officer and began to 
restructure its senior management team. Thereafter, the Company broadened its 
strategy from focusing primarily on manufacturing test products to include 
providing graphical Systems Level Design Automation ("SLDA") design creation 
and verification tools and integrating these with its core technology. As 
part of its strategy, in early 1994, TSSI acquired SEE Technologies, an 
Israeli company that, through its predecessor, began operations in 1983 and 
had operated primarily as a research and development and consulting company 
focused on the electronic design automation ("EDA") and SLDA market. As a 
result of the Reorganization, TSSI and SEE Technologies became wholly-owned 
subsidiaries of Summit in the first quarter of 1994.

The Company's ongoing implementation of its strategy has involved significant 
expenditures. Following the Reorganization, the Company significantly 
increased its research and development expenditures to support the continued 
development of SLDA and Design to Test products. To promote its products, the 
Company has added sales and marketing staff, increasing its sales and 
marketing expenditures by 147% from 1993 to 1996, and has restructured its 
key distributor relationships. This concurrent effort to develop products and 
promote market awareness and acceptance of its products in a new and evolving 
market contributed to the Company's annual losses.  The Company introduced 
its first SLDA product, Visual HDL for VHDL 1.0, in the first quarter of 
1994. This product lacked compiled simulation and operated only on a PC 
platform. In the third quarter of 1994, with the release of version 2.5, 
Summit expanded the simulation capability of Visual HDL for VHDL and 
introduced its UNIX-based version of this product. 

Prior to the Reorganization, the Company's TDS product and related 
maintenance revenue accounted for all of the Company's revenue.  After the 
Reorganization, the Company's revenue has been predominantly derived from two 
product lines, Visual HDL, which includes Visual HDL for VHDL and Visual HDL 
for Verilog, and TDS.  As of July 1, 1997 with the sale of the TDS product 
line, Design to Test products are no longer a source of revenue.  With the 
acquisition of TriQuest Design Automation ("TriQuest") in February 1997 and 
Simulation Technologies Corp ("SimTech"), in September 1997,the Company has 
also derived revenue from verification products which include 
hardware-software co-verification, code coverage,and HDL debugging products 
as well as analysis, verification and RTL optimization tools.

Revenue consists primarily of fees for licenses of the Company's software 
products, maintenance and customer training. Revenue from the sale of 
software licenses is recognized at the later of the time of shipment or 
satisfaction of all acceptance terms. Maintenance revenue is deferred and 
recognized ratably over the term of the maintenance agreement, which is 
typically 12 months. Revenue from customer training is recognized when the 
service is performed. The Company sells its products through a direct sales 
force in North America and selected European countries and through 
distributors in the Company's other international markets. Revenue from 
product sales through distributors is recognized net of the associated 
distributor 

                                  -9-

<PAGE>

discounts. Fees received for granting distribution rights are deferred and 
recognized ratably over the term of the distribution agreement. Although the 
Company has not adopted a formal return policy, the Company generally 
reimburses customers in full for returned products. Estimated sales returns 
are recorded upon delivery of the product.

The Company's products have a range of prices which depend on platform, HDL 
language, functionality and duration of license. In addition, the Company's 
products perform a variety of functions, certain of which are, and in the 
future may be, offered as separate products or discrete point solutions by 
the Company's existing and future competitors. For example, certain companies 
currently offer design entry products without simulators. There can be no 
assurance that such competition will not cause the Company to offer point 
solutions instead of, or in addition to, the Company's current software 
products. Such point solutions would be priced lower than the Company's 
current product offerings and could cause the Company's average selling 
prices to decrease. Accordingly, based on these and other factors, the 
Company expects that average selling prices for its products may continue to 
fluctuate in the future.

The Company has entered into a joint venture with Anam, effective April 1, 
1996, pursuant to which the joint venture corporation (Summit Asia) shall 
acquire exclusive rights to sell, distribute and support all of Summit's 
products in the Asia-Pacific region, excluding Japan.  Summit Asia has acted 
in such capacity since April 1, 1996. Prior to that date, Anam was an 
independent distributor of the Company's products in Korea. The amount of 
revenue from sales through Summit Asia which is remitted to the Company is 
fixed by the joint venture agreement at a percentage which approximates the 
percentage applicable to sales through Anam prior to the formation of the 
joint venture. Excluding one-time sales of technology, sales through Anam 
accounted for 2.4% and 3.6% of the Company's total revenue and for 21.7% and 
33.8% of the Company's revenue attributable to the Asia-Pacific region 
excluding Japan for the years ended December 31, 1995 and 1994, respectively. 
For the year ended December 31, 1996, Anam and Summit Asia together 
accounted for 3.8% of the Company's revenue for the nine months ended 
September 30, 1997. Summit Asia accounted for 3.0% of the Company's revenue.

The Company accounts for its ownership interest in Summit Asia on the equity 
method of accounting and, as a result, the Company's pro rata share of the 
earnings and losses of Summit Asia is recognized as income or losses in 
the Company's income statement in "Other income, net." The Company does not 
expect Summit Asia to recognize a profit for the foreseeable future and thus 
does not expect to recognize income from its investment in Summit Asia for 
the foreseeable future, if at all. 

Approximately 24%, 51%, 37% and 51% of the Company's total revenue for the 
three months ended September 30, 1997 and 1996, and for the nine months ended 
September 30, 1997 and 1996, respectively, were attributable to sales made 
outside the United States. The decline in the percentage of revenue from 
sales made outside the United States for the three and nine months ended 
September 30, 1997 as compared to the same periods in 1996 is primarily the 
result of domestic sales to one customer. The Company expects that 
international revenue will continue to represent a significant portion of its 
total revenue. The Company's international revenue is currently denominated 
in U.S. dollars. As a result, increases in the value of the U.S. dollar 
relative to foreign currencies could make the Company's products more 
expensive and, therefore, potentially less competitive in those markets. The 
Company pays the expenses of its international operations in local currencies 
and does not engage in hedging transactions with respect to such obligations. 
International sales and operations are subject to numerous risks, including 
tariff regulations and other trade barriers, requirements for licenses, 
particularly with respect to the export of certain technologies, 
collectability of accounts receivable, changes in regulatory requirements, 
difficulties in staffing and managing foreign operations and extended payment 
terms. (1)

On February 28, 1997, Summit completed its acquisition of TriQuest.  TriQuest 
develops HDL analysis, optimization and verification tools for the design of 
high performance, deep submicron integrated circuits.  The transaction is 
being accounted for as a "pooling of interest" in accordance with generally 
accepted accounting principals.

- -------------------
(1) This paragraph contains forward-looking statements reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations.  Investors are 
strongly encouraged to review the section entitled "Additional Risk Factors 
That Could Affect Operating Results and Market Price of Stock"  commencing on 
page 19 for a discussion of factors that could affect future performance.

                                      -10-
<PAGE>

Effective July 1, 1997 the Company sold substantially all of the assets used 
in its business of developing and marketing its Test Development Series "TDS" 
Products (the "Asset Sale") to Credence Systems Corporation ("CSC").  The 
increase in the Company's product licenses revenue during the last nine 
quarters has been primarily due to increased revenue associated with the 
Company's SLDA products.  The Asset Sale will allow the Company to focus on 
the development and marketing of these products.

Substantially all of the Company's Design to Test product license revenue and 
related maintenance and services revenue for the year ended December 31, 1996 
and the nine months ended September 30, 1997 were attributable to the TDS 
products.  As of July 1, 1997, TDS products ceased to be a source of such 
revenues.  CSC assumed the Company's obligations under TDS maintenance 
contracts entered into prior to the closing and the Company will not 
recognize deferred revenue associated with such contracts after June 30, 1997.

The Company maintained exclusive rights to its Visual Testbench technology 
and CSC agreed to purchase a minimum of $16,000,000 of Visual Testbench 
licenses over a thirty-month period beginning July 1997 subject to specified 
quarterly maximums and certain additional conditions, and $2,000,000 of 
maintenance over an eighteen month period beginning July 1997.  At the 
completion of the thirty month period, under certain conditions, CSC may 
obtain shared ownership to the Visual Testbench for sales into the ATE 
marketplace.

On September 9, 1997, the Company acquired SimTech, a company that develops 
and distributes hardware-software co-verification, code coverage and HDL 
debugging software. The aggregate consideration for the acquisition 
(including shares of common stock reserved for issuance upon exercise of 
SimTech options assumed by the Company) was 1,980,000 shares of Summit common 
stock and $3,875,000 in cash. The transaction was accounted for using the 
purchase method of accounting. Accordingly, the results of operations for the 
period from September 9, 1997 are included in the consolidated financial 
statements. The purchase price was allocated to the net assets acquired based 
on their estimated fair market values at the date of acquisition. The fair 
value of tangible assets acquired and liabilities assumed were $1.3 million 
and $2.1 million, respectively. In addition, $19.9 million was allocated to 
in-process technology which had not reached technological feasibility and had 
no probable alternative uses, which the Company expensed as of the 
acquisition date. The remainder of the purchase price was allocated to 
Purchased technology ($1,097,000) and identifiable intangibles ($735,000), 
which are being amortized on a straight-line basis over three and five years 
respectively.

The Company's net loss per share for the three and nine months ended 
September 30, 1997 was $(0.87) and (0.67), respectively. Common stock 
equivalents are excluded from the calculation of earnings per share when the 
effect on earnings per share is antidilutive. Had the common stock 
equivalents been included in the earnings per share calculation, net loss per 
share for the three months and nine months ended September 30, 1997 would 
have been $(0.82) and $(0.63), respectively.

                                   -11-
<PAGE>

RESULTS OF OPERATIONS

The following table sets forth for the periods indicated, certain financial 
data as a percentage of revenue.
<TABLE>
<CAPTION>
                                           Three Months Ended    Nine Months Ended
                                              September 30,         September 30,
                                           ------------------    ------------------
                                             1997      1996        1997      1996
                                           --------  --------    --------  --------
<S>                                       <C>       <C>         <C>       <C>
Revenue:
     Product licenses. . . . . . . . .       81.7 %    74.4 %      78.6 %    75.9 %
     Maintenance and services. . . . .       17.1      22.8        19.8      21.2
     Other . . . . . . . . . . . . . .        1.2       2.8         1.6       2.9
                                           --------  --------    --------  --------
         Total revenue . . . . . . . .      100.0     100.0       100.0     100.0
Cost of revenue:
     Product licenses. . . . . . . . .        2.3       3.1         2.5       3.0
     Maintenance and services. . . . .        2.2       2.4         2.0       2.3
                                           --------  --------    --------  --------
         Total Cost of revenue . . . .        4.5       5.5         4.5       5.3
                                           --------  --------    --------  --------
         Gross profit. . . . . . . . .       95.5      94.5        95.5      94.7
Operating expenses:
     Research and development. . . . .       20.5      28.5        21.9      29.8
     Sales and marketing . . . . . . .       34.2      46.1        36.2      46.7
     General and administrative (a). .       12.2      15.3        14.0      16.1
     In-process technology . . . . . .      253.4       -          92.8       -  
                                           --------  --------    --------  --------
         Total operating expenses. . .      320.3      89.9       164.9      92.6
                                           --------  --------    --------  --------
Income-from operations . . . . . . . .     (224.8)      4.6       (69.4)      2.1
Other income (expense), net. . . . . .       75.2       0.2        29.6      (0.2)
                                           --------  --------    --------  --------
Income (loss) before income taxes. . .     (149.6)      4.8       (39.8)      1.9
Income tax provision . . . . . . . . .        8.2       0.7         3.8       1.7
                                           --------  --------    --------  --------
Net income (loss) . . . . . .. . . . .     (157.8) %    4.1 %     (43.6) %    0.2 %
                                           --------  --------    --------  --------
                                           --------  --------    --------  --------
</TABLE>

(a)  General and administrative expenses for the nine months ended September 
     30, 1997 include a one-time charge of $379,000 (1.8% of revenue) for 
     costs relating to the acquisition of TriQuest.

TOTAL REVENUE

The Company's revenue is comprised of product licenses revenue, maintenance 
and services revenue and other revenue.  Total revenue increased by 54% from 
$5.1 million for the three months ended September 30, 1996 to $7.9 million 
for the three months ended September 30, 1997 and total revenue increased by 
48.4% from $14.5 million for the nine months ended September 30, 1996 to 
$21.5 million for the nine months ended September 30, 1997. 

Sales through one distributor accounted for 12.3% and 13.5% of the Company's 
total revenue for the three months ended September 30, 1997 and 1996, 
respectively.  Sales through one distributor accounted for 12.9% and 15.5% of 
the Company's total revenue for the nine months ended September 30, 1997 and 
1996, respectively.  Sales to one customer accounted for 41.4 % of total 
revenue for the three months ended September 30, 1997 and 25% of total 
revenue for the nine months ended September 30, 1997.   No single customer 
accounted for more than 10% of the Company's total revenue for the three 
months and nine months ended September 30, 1996.

                                     -12-

<PAGE>

PRODUCT LICENSES REVENUE

The Company's product licenses revenue is derived from license fees from the 
Company's SLDA Design and Verification products and additionally, from Design 
to Test products through June 30, 1997.  Product licenses revenue increased 
by 69.2% from $3.8 million for the three months ended September 30, 1996 to 
$6.4 million for the three months ended September 30, 1997, and increased by 
53.6% from $11.0 million for the nine months ended September 30, 1996 to 
$16.9 million for the nine months ended September 30, 1997.

Because of the addition of SLDA functionality to Visual Testbench beginning 
with the release of Version 2.0 in December 1996, the Company recognizes 
revenue from Visual Testbench products as SLDA revenue instead of Design to 
Test revenue.

SLDA revenue increased 135% from $3.4 million for the three months ended 
September 30, 1996 to $7.9 million for the three months ended September 30, 
1997. SLDA revenue increased 98% from $9.1 million for the nine months ended 
September 30, 1996 to $18.0 million for the nine months ended September 30, 
1997.  The increase in SLDA revenue for the three months and nine months 
ended September 30, 1997 over the same period in 1996 was primarily 
attributable to sales to a single customer and to revenue from the 
Verification product portfolio that was not shipping in the comparable period 
in 1996.  Significant sales to the single customer are expected to continue 
over the next nine quarters pursuant to contractual arrangements with that 
customer. 

As a result of the sale of all of the assets used in the business of 
developing and marketing the TDS Products effective July 1, 1997, there were 
no Design to Test revenues for the three months ended September 30, 1997 as 
compared to $1 million for the three months ended September 30, 1996.

MAINTENANCE AND SERVICES REVENUE

The Company's maintenance and services revenue is derived from maintenance 
contracts and training classes offered to purchasers of the Company's 
software products.  Maintenance and services revenue increased 15.3% from 
$1.17 million for the three months ended September 30, 1996 to $1.35 million 
for the three months ended September 30, 1997.  Maintenance and services 
revenue increased 38.6% from $3.1 million for the nine months ended September 
30, 1996 to $4.2 million for the nine months ended September 30, 1997. 

The increase in maintenance and services revenue for the three months ended 
September 30, 1997 over the same period in 1996, was comprised of $940,000 
attributable to additional maintenance revenue related to growth in the 
installed base of SLDA customers over the previous year, less $761,000 of 
Design to Test maintenance revenue for the three months ended September 30, 
1996 for which there was no revenue in the comparable period in 1997 as a 
result of the sale of the TDS product line.

OTHER REVENUE

Other revenue consists of revenue from one-time technology sales and fees 
received for granting distribution rights. For the three months ended 
September 30, 1997 and 1996, respectively, other revenue was comprised of 
$91,000 and $141,000 of distribution rights fees. For the nine months ended 
September 30, 1997 and 1996, respectively, other revenue was comprised of 
$358,000 and $425,000 of distribution rights fees.  In May 1997 a 
distribution agreement expired; and, as a result, the distribution rights 
fees paid at the inception of the agreement and amortized to revenue at 
$50,000 each quarter over the agreement period  will no longer be a source of 
other revenue.  Total other revenue relating to the TDS product line amounted 
to $42,000 and $75,000 for the nine months ended September 30, 1997 and 
September 30, 1996, respectively.  No material costs were associated with 
other revenue for the three months and nine months ended  September 30, 1997 
and 1996.

                                     -13-

<PAGE>

COST OF REVENUE

COST OF PRODUCT LICENSES REVENUE

Cost of product licenses revenue includes product packaging, software 
documentation, labor and other costs associated with handling, packaging and 
shipping product and other production related costs plus the amortization of 
purchased technology acquired in the SimTech purchase. The cost of product 
license revenue increased from $156,000 for the three months ended September 
30, 1996 to $184,000 for the three months ended September 30, 1997 and 
increased from $434,000 for the nine months ended September 30, 1996 to 
$533,000 for the nine months ended September 30, 1997.  As a percentage of 
product licenses revenue, the cost of product licenses revenue decreased from 
4.1% of product license revenue to 2.8% of product license revenue for the 
three months ended September 30, 1996 and 1997, respectively, and also 
decreased from 3.9% to 3.2% of product license revenue for the nine months 
ended September 30, 1996 and 1997, respectively.  The decrease in the cost of 
product license revenue as a percent of product license revenue for the three 
months and nine months ended September 30, 1997 over the same periods in 1996 
was due primarily to spreading fixed costs over increased revenues and cost 
savings from delivering verification products electronically.

COST OF MAINTENANCE AND SERVICES REVENUE

Cost of maintenance and services revenue, which consists primarily of 
personnel costs for customer support and training classes offered to 
purchasers of the Company's products, increased 40.2% from $122,000 for the 
three months ended September 30, 1996 to $171,000 for the three months ended 
September 30, 1997 and increased 26.4% from $333,000 for the nine months 
ended September 30, 1996 to $421,000 for the nine months ended September 30, 
1997.  As a percentage of maintenance and services revenue, the cost of 
maintenance and services revenue increased from 10.5% for the three months 
ended September 30, 1996 to 12.7% for the three months ended September 30, 
1997 and decreased from 10.9% for the nine months ended September 30, 1996 to 
9.9% for the nine months ended September 30, 1997. The decrease in the cost 
of maintenance and services revenue as a percent of revenue for the nine 
months ended September 30, 1997 over the same period in 1996 was primarily 
the result of the Company operating below forecasted staffing levels during 
the first half of 1997.  The Company has increased headcount during the third 
quarter of 1997.

OPERATING EXPENSES

RESEARCH AND DEVELOPMENT

Research and development expenses consist of the engineering and operations 
support costs of developing new products and enhancements to existing 
products and performing quality assurance activities. Research and 
development expenses increased 10.9% from $1.5 million for the three months 
ended September 30, 1996 to $1.6 million for the three months ended September 
30, 1997.  Research and development expenses increased 9% from $4.3 million 
for the nine months ended September 30, 1996 to $4.7 million for the nine 
months ended September 30, 1997. As a percentage of total revenue, research 
and development expenses decreased from 28.4% for the three months ended 
September 30, 1996 to 20.5% for the three months ended September 30, 1997 and 
also decreased as a percentage of revenue from 29.8% for the nine months 
ended September 30, 1996 to 21.9% for the nine months ended September 30, 
1997.  During the three months ended September 30, 1997, in connection with 
the sale of the TDS product line on July 1, 1997, the Company's research and 
development staff decreased by 15 engineers. With the acquisition of SimTech 
on September 9, 1997 the Company added 28 engineers.  Additionally, the 
Company hired 18 new engineers during the third quarter of 1997.  The Company 
continues to believe that significant investment in research and development 
is required to remain competitive in its markets.

                                     -14-

<PAGE>

Software development costs are accounted for in accordance with Financial 
Accounting Standards Board Statement No. 86, under which the Company is 
required to capitalize software development costs after technological 
feasibility has been established. To date, development costs have been 
expensed as incurred since technological feasibility generally has not been 
established until shortly before the release of a new product, and no 
material development costs have been incurred after establishment of 
technological feasibility.

SALES AND MARKETING

Sales and marketing expenses, consisting primarily of salaries, commissions 
and promotional costs, increased 14.1% from $2.4 million for the three months 
ended September 30, 1996 to $2.7 million for the three months ended September 
30, 1997 and increased 15% from $6.8 million for the nine months ended 
September 30, 1996 to $7.8 million for the nine months ended September 30, 
1997.  The increase for the nine months ended September 30, 1997 over the 
same period in 1996 was attributable to the addition of ten sales and 
marketing personnel and the related increased commissions and travel 
expenses. As a percentage of total revenue, sales and marketing expenses 
decreased from 46.1% for the three months ended September 30, 1996 to 34.2% 
for the three months ended September 30, 1997 and decreased from 46.7% for 
the nine months ended September 30, 1996 to 36.2% for the nine months ended 
September 30, 1997.  The decrease as a percentage of revenue was primarily 
attributable to the increase in total revenue for 1997.

GENERAL AND ADMINISTRATIVE

General and administrative expenses consist primarily of the corporate, 
finance, human resource, information services, administrative, and legal and 
accounting expenses of the Company.  General and administrative expenses 
increased 22.2% from $785,000 for the three months ended September 30, 1996 
to $959,000 for the three months ended September 30, 1997 and increased 29.4% 
from $2.3 million for the nine months ended September 30, 1996 to $3.0 
million for the nine months ended September 30, 1997, which includes a 
$379,000 one-time charge for costs associated with the acquisition of 
TriQuest.  Excluding this one-time charge, general and administrative 
expenses increased by $306,000 (13.1%) for the nine months ended September 
30, 1997 as compared to the same period in the prior year.  As a percentage 
of total revenue, excluding the one time charge for costs associated with the 
acquisition of TriQuest, general and administrative expenses decreased from 
15.4% for the three months ended September 30, 1996 to 12.2% for the three 
months ended September 30, 1997 and decreased from 16.1% for the nine months 
ended September 30, 1996 to 12.3% for the nine months ended September 30, 
1997.  The decrease as a percentage of total revenue was attributable to the 
increase in total revenue in 1997.  The Company expects general and 
administrative expenses to increase in absolute dollars to support future 
sales and operations, including acquired operations, and the additional costs 
associated with being a public company.(2)

ACQUIRED IN-PROCESS TECHNOLOGY

For the three months ended September 30, 1997, $19.9 million of the purchase 
price for the acquisition of Simulation Technologies, Corp. ($22.1 million) 
was allocated to in-process technology and accordingly, was expensed as of 
the acquisition date (September 9, 1997).  The amount allocated to the 
in-process technology represented the estimated fair value determined based 
upon known valuation techniques in the high technology industry.  The 
technological feasibility of in-process technology had not been established 
and had no alternative future use at the time of the acquisition.

- -------------------
(2) This statement is a forward-looking statement reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations. Investors are 
strongly encouraged to review the section entitled "Additional Risk  Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
page 19 for a discussion of factors that could affect future performance. 

                                     -15-


<PAGE>

INTEREST EXPENSE

Interest expense decreased from $17,000 for the three months ended September 
30, 1996 to $1,000 for the three months ended September 30, 1997 and 
decreased from $93,000 for the nine months ended September 30, 1996 to 
$10,000 for the nine months ended September 30, 1997 due to decreased 
borrowings under the Company's bank line of credit, long term debt and 
capital leases obligations.

OTHER INCOME, NET

Other income consists of interest income associated with available cash 
balances, gains or losses from the sale of property and equipment, the 
Company's pro rata share of the earnings and losses of Summit Design Asia and 
foreign exchange rate differences resulting from paying operating expenses of 
foreign operations in the local currency.  Other income was  $27,000 for the 
three months ended September 30, 1996 and $348,000 for the three months ended 
September 30, 1997  and $49,000 for the nine months ended September 30, 1996 
and $797,000 for the nine months ended September 30, 1997.  The increase in 
other income was primarily due to increased interest earned on the Company's 
cash holdings.

GAIN ON SALE OF TDS PRODUCT LINE

On July 11, 1997 the Company sold substantially all of the assets used in its 
business of developing and marketing its Test Development Series "TDS" 
Products to CSC for $5 million.  CSC assumed certain liabilities, including 
the Company's obligations under TDS maintenance contracts entered into prior 
to the closing.  The Company has recorded a gain on the sale of $5,569,000.

INCOME TAX PROVISION

The income tax provision increased from $34,000 for the three months ended 
September 30, 1996 to $640,000 for the three months ended September 30, 1997 
and increased from $243,000 for the nine months ended September 30, 1996 to 
$820,000 for the nine months ended September 30, 1997.  The Company utilized 
substantially all of its U.S. Federal and State net operating loss 
carryforwards to offset a considerable portion of U.S. taxable income for the 
nine months ending September 30, 1997.  The provision of $820,000 for the 
nine months ended September 30, 1997 is comprised of $1,357,000 of Federal, 
State and foreign taxes payable, less $537,000 of deferred tax benefit 
recognized for research and development credits and alternative minimum tax 
credits.  The provision for the nine months ended September 30, 1996 is 
comprised primarily of Japanese withholding tax on sales in Japan through 
June 1996 and alternative minimum tax.

VARIABILITY OF OPERATING RESULTS

The Company has experienced significant quarterly fluctuations in operating 
results and cash flows and it is likely that these fluctuations will continue 
in future periods.  These fluctuations have been, and may in the future be, 
caused by a number of factors, including the rate of acceptance of new 
products, corporate acquisitions and consolidations, product, customer and 
channel mix, the size and timing of orders, lengthy sales cycles, the timing 
of new product announcements and introductions by the Company and its 
competitors, seasonal factors, rescheduling or cancellation of customer 
orders, the Company's ability to continue to develop and introduce new 
products and product enhancements on a timely basis, the level of 
competition, purchasing and payment patterns and product enhancements on a 
timely basis, the level of competition, purchasing and payment patterns, 
pricing policies of the Company and its competitors, product quality issues, 
currency fluctuations and general economic conditions.

The Company has generally recognized a substantial portion of its revenue in 
the last month of each quarter, with this revenue concentrated in the latter 
part of the month.  Any significant deferral of purchases of the 

                                       -16-
<PAGE>

Company's products could have a material adverse effect on the Company's 
business, financial condition and results of operations in any particular 
quarter, and to the extent that significant sales occur earlier than 
expected, operating results for subsequent quarters may be adversely 
affected. The Company's revenue is difficult to forecast for several reasons. 
The market for certain of the Company's software products is evolving. The 
Company's sales cycle is typically six to nine months and varies 
substantially from customer to customer.  In addition, a significant portion 
of the Company's sales are made through indirect channels and can be harder 
to predict. The Company establishes its expenditure levels for product 
development, sales and marketing and other operating activities based 
primarily on its expectations as to future revenue. As a result, if revenue 
in any quarter falls below expectations, expenditure levels could be 
disproportionately high as a percentage of revenue, and the Company's 
operating results for that quarter would be adversely affected. Based upon 
the factors described above, the Company believes that its quarterly revenue, 
expenses and operating results are likely to vary significantly in the 
future, that period-to-period comparisons of its results of operations are 
not necessarily meaningful and that, as a result, such comparisons should not 
be relied upon as indications of the Company's future performance. Moreover, 
although the Company's revenue has increased in recent periods, there can be 
no assurance that the Company's revenue will grow in future periods or that 
the Company will remain profitable on a quarterly or annual basis. Due to the 
foregoing or other factors, it is likely that the Company's results of 
operations may be below investors' and market analysts' expectations in some 
future quarters, which could have a severe adverse effect on the market price 
of the Company's Common Stock.

EFFECTIVE CORPORATE TAX RATES

The Company is taxed in its jurisdictions of operations based on the extent 
of taxable income generated in each jurisdiction. For income tax purposes, 
revenue is attributed to the taxable jurisdiction where the sales 
transactions generating the revenue were initiated. All sales transactions by 
Summit Design (EDA) Ltd., the Company's Israeli subsidiary, to the Company 
were recorded as arm's length transactions based on an intercompany pricing 
agreement. All sales transactions by the Company are to unrelated parties and 
are based upon prevailing market prices. There is no offset of taxes between 
the United States and Israel. The Israeli operations are performed entirely 
by Summit Design (EDA) Ltd., which is a separate taxable Israeli entity.

The Company's future effective tax rate depends in part on the availability 
of United States and Israeli net operating loss ("NOLs") and credit 
carryforwards. As of December 31, 1996, the Company had recorded U.S. federal 
and state NOLs of approximately $9.0 million and $5.6 million, respectively 
and Israeli NOLs of approximately $4.7 million. In addition the Company has 
$1 million in credit carry forwards for U.S. tax purposes as of December 31, 
1996. Neither the United States nor the Israeli taxing authorities have 
verified the accuracy or availability of the Company's NOLs and credit 
carryforward amounts. However, as a result of the Asset Sale and the Company's 
current taxable income in the United States for the nine months ended 
September 30, 1997, the Company expects to utilize substantially all of the 
U.S. NOLs to offset current taxable income during 1997.(1)

In addition to its NOLs and credit carryforwards, the Company is currently 
scheduled to receive tax benefits over the next several years under a tax 
holiday in Israel. The Company's existing Israeli production facility has 
been granted "Approved Enterprise" status under the Israeli Investment Law, 
which entitles the Company to reductions in the tax rate normally applicable 
to Israeli companies with respect to the income generated by its "Approved 
Enterprise" programs. In particular, the tax holiday covers the seven-year 
period beginning the first year in which Summit Design (EDA) Ltd. generates 
taxable income from its "Approved Enterprise" 

- ------------------------
(1) This paragraph contains forward-looking statements reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations. Investors are 
strongly encouraged to review the section entitled "Additional Risk Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
page 19 for a discussion of factors that could affect future performance.

                                       -17-
<PAGE>


(after using any available NOLs), provided that such benefits will terminate 
in 2006 regardless of whether the seven-year period has expired. The tax 
holiday provides that, during such seven-year period, a portion of the 
Company's taxable income from its Israeli operations will be taxed at 
favorable tax rates. The termination or reduction of the Company's Israeli 
tax benefits would have a material adverse effect on the Company's overall 
actual effective tax rate. The Company has recently applied for "Approved 
Enterprise" status with respect to a new project and intends to apply in the 
future with respect to additional projects. There can be no assurance that 
the Company will be granted any approvals and therefore there can be no 
assurance the Company will continue to receive favorable tax status in 
Israel. 

The Company is also subject to the risk that United States and foreign tax 
laws and rates may change in a future period or periods, and that any such 
changes may materially adversely affect the Company's tax rate. As a result 
of the factors described above and other related factors, there can be no 
assurance that the Company will maintain a favorable tax rate in future 
periods. Any increase in the Company's effective tax rate, or variations in 
the effective tax rate from period to period, could have a material adverse 
effect on the Company's business, financial condition and results of 
operations.

LIQUIDITY AND CAPITAL RESOURCES

The Company completed its initial public offering in October 1996, raising 
$16.2 million, net of offering expenses.  Prior to the IPO, the Company had 
financed its operations primarily through the private placement of 
approximately $15.4 million of capital stock, as well as capital equipment 
leases, borrowings under its bank line of credit, Israeli research and 
development grants and cash generated from operations.  As of September 30, 
1997, the Company had approximately $17.2 million in cash and cash 
equivalents and a $1.0 million bank line of credit with United States 
National Bank of Oregon ("the Bank"). The line of credit expires on April 30, 
1998.  Borrowings thereunder accrue interest at specified percentages above 
the prime lending rate based on the Company's ratio of debt to tangible net 
worth. Advances under the line of credit are limited to a specified 
percentage of eligible accounts receivable (as defined in the line of 
credit). Borrowings under the line of credit are collateralized by the 
Company's accounts receivable, inventory and general intangible assets, 
including its intellectual property rights. As of September 30, 1997, the 
Company had no borrowings outstanding under this line of credit.

The Company is obligated to lend up to $2,500,000 to an independent software 
development company pursuant to a secured loan agreement entered into during 
July 1997. Borrowings under the agreement bear interest at prime rate plus 2%.

As of September 30, 1997, the Company had working capital of approximately 
$10.3 million.

Net cash generated by operating activities was approximately $9.3 million and 
$3.8 million for the nine months ended September 30, 1997 and 1996, 
respectively. Cash generated by operating activities resulted primarily from 
profitable operations plus the increase in accounts payable, accrued 
liabilities and deferred revenue and a decrease in accounts receivable for 
the nine months ended September 30, 1997. Cash generated from operating 
activities for the nine months ended September 30, 1996 resulted primarily 
from the significant collection of accounts receivable and an increase in 
deferred revenue. 

Net cash used in investing activities was approximately $910,000 and $647,000 
for the nine months ended September 30, 1997 and 1996, respectively. Net cash 
used in investing activities for the nine months ended September 30, 1997 was 
related primarily to the acquisition of Simulation Technologies, Corp. in 
September 1997, the purchase of furniture and equipment and loans to related 
parties less the cash provided from the sale of the TDS product line. Net 
cash used in investing activaities for the nine months ended September 30, 
1996 related to the acquisition of furniture and equipment  and a $100,000 
investment in a Joint Venture.

Net cash used in financing activities for the nine months ended September 30, 
1997,was approximately $11.0 million.  Approximately $ 11.6 million was used 
to purchase treasury stock and $100,000 was used for repayment of long-term 
debt and capital lease obligations; $700,000 was provided by the issuance of 
common

                                       -18-
<PAGE>

stock.  Net cash used in financing activities for the nine months ended 
September 30, 1996, was approximately $1.1 million. For the nine months ended 
September 30, 1996 approximately $1.6 million of cash was used for repayment 
of short term borrowings, long-term debt and capital lease obligations which 
was off set by $73,000 of cash provided by proceeds from long-term debt and 
approximately $1.1 million of cash provided from the issuance of Summit 
common and TriQuest preferred stock less IPO issuance costs of $674,000.

The Company presently believes that its current cash and cash equivalent, 
together with funds expected to be generated from operations, will satisfy 
the Company's anticipated working capital and other cash requirements for at 
least the next 12 months.(2)

ADDITIONAL RISK FACTORS THAT COULD AFFECT OPERATING RESULTS AND MARKET PRICE 
OF STOCK

HISTORY OF OPERATING LOSSES; FLUCTUATIONS IN QUARTERLY RESULTS

While the Company has generated net income in prior quarters, there can be no 
assurance that the Company will be profitable in the future. In addition, the 
Company has experienced significant quarterly fluctuations in operating 
results and cash flows and it is likely that these fluctuations will continue 
in future periods. These fluctuations have been, and may in the future be, 
caused by a number of factors, including the rate of acceptance of new 
products, corporate acquisitions and consolidations, product, customer and 
channel mix, the size and timing of orders, lengthy sales cycles, the timing 
of new product announcements and introductions by the Company and its 
competitors, seasonal factors, rescheduling or cancellation of customer 
orders, the Company's ability to continue to develop and introduce new 
products and product enhancements on a timely basis, the level of 
competition, purchasing and payment patterns, pricing policies of the Company 
and its competitors, product quality issues, currency fluctuations and 
general economic conditions.

The Company has generally recognized a substantial portion of its revenue in 
the last month of each quarter, with this revenue concentrated in the latter 
part of the month.  Any significant deferral of purchases of the Company's 
products could have a material adverse effect on the Company's business, 
financial condition and results of operations in any particular quarter, and 
to the extent that significant sales occur earlier than expected, operating 
results for subsequent quarters may be adversely affected. The Company's 
revenue is difficult to forecast for several reasons. The market for certain 
of the Company's software products is evolving. The Company's sales cycle is 
typically six to nine months and varies substantially from customer to 
customer. The Company operates with little product backlog because its 
products are typically shipped shortly after orders are received. In 
addition, a significant portion of the Company's sales are made through 
indirect channels and can be harder to predict. The Company establishes its 
expenditure levels for product development, sales and marketing and other 
operating activities based primarily on its expectations as to future 
revenue. As a result, if revenue in any quarter falls below expectations, 
expenditure levels could be disproportionately high as a percentage of 
revenue, and the Company's operating results for that quarter would be 
adversely affected. Based upon the factors described above, the Company 
believes that its quarterly revenue, expenses and operating results are 
likely to vary significantly in the future, that period-to-period comparisons 
of its results of operations are not necessarily meaningful and that, as a 
result, such comparisons should not be relied upon as indications of the 
Company's future performance. Moreover, although the Company's revenue has 
increased in recent periods, there can be no assurance that the Company's 
revenue will grow in future periods or that the Company will remain 
profitable on a quarterly or annual basis. Due to the foregoing or other 
factors, it is likely that the Company's results of operations may be below 
investors' and market analysts' expectations in some future quarters, which 
could have a severe adverse effect on the market price of the Company's 
Common Stock.

- ------------------------
(2) This statement is a forward-looking statement reflecting current 
expectations.  There can be no assurance that the Company's actual future 
performance will meet the Company's current expectations.  Investors are 
strongly encouraged to review the section entitled "Additional Risk Factors 
That Could Affect Operating Results and Market Price of Stock" commencing on 
this page for a discussion of factors that could affect future performance.

                                       -19-

<PAGE>

PRODUCT CONCENTRATION; UNCERTAINTY OF MARKET ACCEPTANCE OF SLDA

Prior to July 1997, the Company's revenue was predominantly derived from two 
product lines, Visual HDL, which includes Visual HDL for VHDL and Visual HDL 
for Verilog, and TDS.  Effective July 1, 1997, as a result of the Asset Sale, 
TDS products ceased to be a source of revenue.  With the acquisition of 
TriQuest in February 1997 and SimTech in September 1997, the Company also 
derives revenue from verification products which include hardware-software 
co-verification, code coverage,and HDL debugging products as well as 
analysis, verification and RTL optimization tools.

The Company believes that SLDA products will continue to account for a 
substantially all of its revenue in the future. As a result, factors 
adversely affecting sales of these products, including increased competition, 
inability to successfully introduce enhanced or improved versions of these 
products, product quality issues and technological change, could have a 
material adverse effect on the Company's business, financial condition and 
results of operations.

The Company's future success depends primarily upon the market acceptance of 
its existing and future SLDA products. The Company commercially shipped its 
first SLDA product, Visual HDL for VHDL, in the first quarter of 1994. For 
the three months and the nine months ended September 30, 1997 and for the 
years ended December 31, 1996, 1995 and 1994, respectively, revenue from SLDA 
products and related maintenance contracts represented 100%, 83.6%, 60.9%, 
43.6% and 34.8%, respectively, of the Company's total revenue. The Company's 
SLDA products incorporate certain unique design methodologies and thus 
represent a departure from industry standards for design creation and 
verification. The Company believes that broad market acceptance of its SLDA 
products will depend on several factors, including the ability to 
significantly enhance design productivity, ease of use, interoperability with 
existing EDA tools, price and the customer's assessment of the Company's 
financial resources and its technical, managerial, service and support 
expertise. The Company also depends on its distributors to assist the Company 
in gaining market acceptance of its products. There can be no assurance that 
sufficient priority will be given by the Company's distributors to marketing 
the Company's products or whether such distributors will continue to offer 
the Company's products. There can be no assurance that the Company's SLDA 
products will achieve broad market acceptance. A decline in the demand for, 
or the failure to achieve broad market acceptance of, the Company's SLDA 
products will have a material adverse effect on the Company's business, 
financial condition and results of operations.

Although demand for SLDA products has increased in recent years, the market 
for SLDA products is still emerging and there can be no assurance that it 
will continue to grow or that, even if the market does grow, businesses will 
continue to purchase the Company's SLDA products. If the market for SLDA 
products fails to grow or grows more slowly than the Company currently 
anticipates, the Company's business, financial condition and results of 
operations would be materially adversely affected.

Traditionally, EDA customers have been risk averse in accepting new design 
methodologies. Because many of Summit's tools embody new design 
methodologies, this risk aversion on the part of potential customers presents 
an ongoing marketing and sales challenge to the Company and makes the 
introduction and acceptance of new products unpredictable. The Company's 
Visual Testbench product, introduced in the fourth quarter of 1995, provides 
a new methodology and requires a change in the traditional design flow for 
creating IC test programs. The Company anticipates a lengthy period of test 
marketing for the Visual Testbench product. Accordingly, the Company cannot 
predict the extent, if any, to which it will realize revenue from Visual 
Testbench in excess of the revenue expected to be received pursuant to an OEM 
agreement entered into in July 1997.  

COMPETITION

The EDA industry is highly competitive and the Company expects competition to 
increase as other EDA companies introduce SLDA products.  In the SLDA market, 
the Company principally competes with Mentor 

                                       -20-

<PAGE>

Graphics and a number of smaller firms. Indirectly, the Company also competes 
with other firms that offer alternatives to SLDA and could potentially offer 
more directly competitive products in the future. Certain of these companies 
have significantly greater financial, technical and marketing resources and 
larger installed customer bases than the Company. Some of the Company's 
current and future competitors offer a more complete range of EDA products 
and may distribute products that directly compete with the Company's SLDA 
products by bundling such products with their core product line. In addition, 
the Company's products perform a variety of functions, certain of which are, 
and in the future may be, offered as separate products or discrete point 
solutions by the Company's existing and future competitors. For example, 
certain companies currently offer design entry products without simulators. 
There can be no assurance that such competition will not cause the Company to 
offer point solutions instead of, or in addition to, the Company's current 
software products. Such point solutions would be priced lower than the 
Company's current product offerings and could cause the Company's average 
selling prices to decrease, which could have a material adverse effect on the 
Company's business, financial condition and results of operations.

The Company competes on the basis of certain factors including product 
capabilities, product performance, price, support of industry standards, ease 
of use, first to market and customer technical support and service. The 
Company believes that it competes favorably overall with respect to these 
factors. However, in particular cases, the Company's competitors may offer 
SLDA products with functionality which is sought by the Company's prospective 
customers and which differs from that offered by the Company. In addition, 
certain competitors may achieve a marketing advantage by establishing formal 
alliances with other EDA vendors. Further, the EDA industry in general has 
experienced significant consolidation in recent years, and the acquisition of 
one of the Company's competitors by a larger, more established EDA vendor 
could create a more significant competitor. 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 have 
a material adverse effect on its business, financial condition and results of 
operations. There can be no assurance that the Company's current and future 
competitors will not be able to develop products comparable or superior to 
those developed by the Company or to adapt more quickly than the Company to 
new technologies, evolving industry trends or customer requirements. 
Increased competition could result in price reductions, reduced margins and 
loss of market share, all of which could have a material adverse effect on 
the Company's business, financial condition and results of operations.

DEPENDENCE ON ELECTRONICS INDUSTRY MARKET

Because the electronics industry is characterized by rapid technological 
change, short product life cycles, fluctuations in manufacturing capacity and 
pricing and margin pressures, certain segments, including the computer, 
semiconductor, semiconductor test equipment and telecommunications 
industries, have experienced sudden and unexpected economic downturns. During 
these periods, capital spending is commonly curtailed and the number of 
design projects often decreases. Because the Company's sales are dependent 
upon capital spending trends and new design projects, negative factors 
affecting the electronics industry could have a material adverse effect on 
the Company's business, financial condition and results of operations. A 
number of electronics companies, including customers of the Company, have 
recently experienced a slowdown in their businesses. The Company's future 
operating results may reflect substantial fluctuations from period to period 
as a consequence of such industry patterns, general economic conditions 
affecting the timing of orders from customers and other factors.

DEPENDENCE ON THIRD PARTIES FOR PRODUCT INTEROPERABILITY

Because the Company's products must interoperate with EDA products of other 
companies, particularly simulation and synthesis products, the Company must 
have timely access to third party software to perform development and testing 
of its products. Although the Company has established relationships with a 
variety of EDA vendors to gain early access to new product information, these 
relationships may be terminated by either party with limited notice. In 
addition, such relationships are with companies that are current or potential 
future competitors of the Company, including Synopsys, Mentor Graphics and 
Cadence. If any of these relationships were terminated and the Company was 

                                       -21-

<PAGE>

unable to obtain, in a timely manner, information regarding modifications of 
third party products necessary for modifying its software products to 
interoperate with these third party products, the Company could experience a 
significant increase in development costs, the development process would take 
longer, product introductions would be delayed and the Company's business, 
financial condition and results of operations could be materially adversely 
affected.

NEW PRODUCTS AND TECHNOLOGICAL CHANGE; EVOLVING INDUSTRY STANDARDS

The EDA industry is characterized by extremely rapid technological change, 
frequent new product introductions and evolving industry standards. The 
introduction of products embodying new technologies and the emergence of new 
industry standards can render existing products obsolete and unmarketable. In 
addition, customers in the EDA industry require software products that allow 
them to reduce time to market, differentiate their products, improve their 
engineering productivity and reduce their design errors. The Company's future 
success will depend upon its ability to enhance its current products, develop 
and introduce new products that keep pace with technological developments and 
emerging industry standards and address the increasingly sophisticated needs 
of its customers. There can be no assurance that the Company will be 
successful in developing and marketing product enhancements or new products 
that respond to technological change or emerging industry standards, that the 
Company will not experience difficulties that could delay or prevent the 
successful development, introduction and marketing of these products, or that 
its new products will adequately meet the requirements of the marketplace and 
achieve market acceptance.  If the Company is unable, for technological or 
other reasons, to develop and introduce products in a timely manner in 
response to changing market conditions, industry standards or other customer 
requirements, particularly if such product releases have been pre-announced, 
the Company's business, financial condition and results of operations will be 
materially adversely affected.

Software products as complex as those offered by the Company may contain 
errors that may be detected at any point in the products' life cycles. The 
Company has in the past discovered software errors in certain of its products 
and has experienced delays in shipment of products during the period required 
to correct these errors. There can be no assurance that, despite testing by 
the Company and by current and potential customers, errors will not be found, 
resulting in loss of, or delay in, market acceptance and sales, diversion of 
development resources, injury to the Company's reputation or increased 
service and warranty costs, any of which could have a material adverse effect 
on the Company's business, financial condition and results of operations.

DEPENDENCE ON DISTRIBUTORS

The Company relies on distributors for licensing and support of its products 
outside of North America. Approximately 34%, 48%, 46%, 42% and 38% of the 
Company's revenue for the nine months ended September 30, 1997 and 1996 and 
for the  years ended December 31, 1996, 1995 and 1994, respectively, were 
attributable to sales made through distributors. The Company has also entered 
into a joint venture with Anam pursuant to which the joint venture 
corporation (Summit Design Korea, Inc. ("Summit Asia")) shall acquire 
exclusive rights to sell, distribute and support all of the Company's 
products in the Asia-Pacific region, excluding Japan.  Summit Asia has acted 
in such capacity since April 1, 1996. Prior to that date, Anam was an 
independent distributor of the Company's products. During the first quarter 
of 1997, the Company entered into a distribution agreement with ATE pursuant 
to which ATE was granted exclusive rights to sell, distribute and support 
Summit's Visual Testbench products within Japan until October 1998, subject 
to the Company's ability to terminate the relationship if ATE fails to meet 
quarterly sales objectives. The agreement may also be terminated by either 
party for breach. In addition, in the first quarter of 1996, the Company 
entered into a three-year, exclusive distribution agreement for its SLDA 
products in Japan with Seiko.  In the event Seiko fails to meet specified 
quotas for two or more quarterly periods, exclusivity can be terminated by 
Summit, subject to Seiko's right to pay a specified fee to maintain 
exclusivity. The agreement is renewable for successive five-year terms by 
mutual agreement of the Company and Seiko and is terminable by either party 
for breach. In March 1997, the Company entered into a three-year distribution 
agreement with Kanematsu USA Inc. to which Kanematsu was granted exclusive 
distribution rights to see, distribute and support certain verification 
products in Japan.  For the year ended December 31, 1996 and nine months 
ended September 30, 1997, all sales of the Company's products in the 
Asia-Pacific region were through Seiko, Summit Asia, ATE and Kanematsu. There 
can be no assurance the relationships with Seiko, Summit Asia, ATE 

                                       -22-

<PAGE>

and Kanematsu will be effective in maintaining or increasing sales relative 
to the levels experienced prior to such relationships. The Company also has 
independent distributors in Europe and is dependent on the continued 
viability and financial stability of its distributors. Since the Company's 
products are used by skilled design engineers, distributors must possess 
sufficient technical, marketing and sales resources and must devote these 
resources to a lengthy sales cycle, customer training and product service and 
support. Only a limited number of distributors possess these resources. In 
addition, Seiko, Summit Asia, ATE and Kanematsu, as well as the Company's 
other distributors, may offer products of several different companies, 
including competitors of the Company. There can be no assurance that the 
Company's current distributors will continue to market or service and support 
the Company's products effectively, that any distributor will continue to 
sell the Company's products or that the distributors will not devote greater 
resources to products of other companies. The loss of, or a significant 
reduction in, revenue from the Company's distributors could have a material 
adverse effect on the Company's business, financial condition and results of 
operations.

INTERNATIONAL SALES AND OPERATIONS

Approximately 24%, 37%, 50%, 52% and 39% of the Company's revenue for the 
three months and nine months ended September 30, 1997 and the years ended 
December 31, 1996, 1995 and 1994, respectively, were attributable to sales 
made outside the United States. The decline in the percent of revenue from 
sales made outside the United States for the three and nine months ended 
September 30, 1997 is related primarily to domestic sales to one customer. The 
Company expects that international revenue will continue to represent a 
significant portion of its total revenue. The Company's international revenue 
is currently denominated in U.S. dollars. As a result, increases in the value 
of the U.S. dollar relative to foreign currencies could make the Company's 
products more expensive and, therefore, potentially less competitive in those 
markets. The Company pays the expenses of its international operations in 
local currencies and does not engage in hedging transactions with respect to 
such obligations. International sales and operations are subject to numerous 
risks, including tariff regulations and other trade barriers, requirements 
for licenses, particularly with respect to the export of certain 
technologies, collectability of accounts receivable, changes in regulatory 
requirements, difficulties in staffing and managing foreign operations and 
extended payment terms. There can be no assurance that such factors will not 
have a material adverse effect on the Company's future international sales 
and operations and, consequently, on the Company's business, financial 
condition and results of operations.

In order to successfully expand international sales, the Company may need to 
establish additional foreign operations, hire additional personnel and 
recruit additional international distributors. This will require significant 
management attention and financial resources and could adversely affect the 
Company's operating margins. In addition, to the extent that the Company is 
unable to effect these additions in a timely manner, the Company's growth, if 
any, in international sales will be limited. There can be no assurance that 
the Company will be able to maintain or increase international sales of the 
Company's products, and failure to do so could have a material adverse effect 
on the Company's business, financial condition and results of operations.

MANAGEMENT OF GROWTH AND ACQUISITIONS

Summit's ability to achieve significant growth will require it to implement 
and continually expand its operational and financial systems, recruit 
additional employees and train and manage current and future employees.  
Summit expects any such growth will place a significant strain on its 
operational resources and systems.  Failure to effectively manage any such 
growth would have a material adverse effect on Summit's business, financial 
condition and results of operations.

On February 28, 1997, Summit completed its acquisition of TriQuest and on 
September 9, 1997, Summit completed its acquisition of SimTech.  As a result 
of these acquisitions, Summit's operating expenses are expected to increase.  
There can be no assurance that the integration of TriQuest's and SimTech's 
business can be successfully completed in a timely fashion, or at all, or 
that the revenues from TriQuest and SimTech will be sufficient to support the 
costs associated with the acquired businesses, without adversely affecting 
Summit's operating margins.  Any failure to successfully complete the 
integration in a timely fashion or to generate sufficient revenues from the 
acquired business could have a material adverse effect on Summit's business 
and results of operations.  In addition, Summit regularly evaluates 
acquisition opportunities. Future acquisitions by Summit could result in 
potentially dilutive issuances of equity securities, the incurrence of debt 
and contingent liabilities and amortization expenses related to goodwill and 
other intangible assets, 

                                       -23-

<PAGE>

which could materially adversely affect Summit's results of operations.  
Product and technology acquisitions entail numerous risks, including 
difficulties in the assimilation of acquired operations, technologies and 
products, diversion of management's attention to other business concern, 
risks of entering markets in which Summit has no or limited prior experience 
and potential loss of key employees of acquired companies.  Summit's 
management has had limited experience in assimilating acquired organizations 
and products into Summit's operations. No assurance can be given as to the 
ability of Summit to integrate successfully any operations, personnel or 
products that have been acquired or that might be acquired in the future, and 
the failure of Summit to do so could have a material adverse effect on 
Summit's results of operations.

OPERATIONS IN ISRAEL

The Company's research and development operations related to its SLDA 
products are located in Israel and may be affected by economic, political and 
military conditions in that country. Accordingly, the Company's business, 
financial condition and results of operations could be materially adversely 
affected if hostilities involving Israel should occur. This risk is 
heightened due to the restrictions on the Company's ability to manufacture or 
transfer outside of Israel any technology developed under research and 
development grants from the government of Israel as described in "--Israeli 
Research, Development and Marketing Grants." In addition, while all of the 
Company's sales are denominated in U.S. dollars, a portion of the Company's 
annual costs and expenses in Israel are paid in Israeli currency. These costs 
and expenses were approximately $4.3, $4.3 and $2.9 million in 1996, 1995 and 
1994, respectively.   Payment in Israeli currency subjects the Company to 
foreign currency fluctuations and to economic pressures resulting from 
Israel's generally high rate of inflation, which has been approximately 11%, 
8% and 15% during 1996, 1995, and 1994, respectively. The Company's primary 
expense which is paid in Israeli currency is employee salaries for research 
and development activities. As a result, an increase in the value of Israeli 
currency in comparison to the U.S. dollar could increase the cost of research 
and development expenses and general and administrative expenses. There can 
be no assurance that currency fluctuations, changes in the rate of inflation 
in Israel or any of the other aforementioned factors will not have a material 
adverse effect on the Company's business, financial condition or results of 
operations. In addition, coordination with and management of the Israeli 
operations requires the Company to address differences in culture, 
regulations and time zones. Failure to successfully address these differences 
could be disruptive to the Company's operations.

The Company's Israeli production facility has been granted the status of an 
"Approved Enterprise" under the Israeli Investment Law for the Encouragement 
of Capital Investments, 1959 (the "Investment Law"). Taxable income of a 
company derived from an "Approved Enterprise" is eligible for certain tax 
benefits, including significant income tax rate reductions for up to seven 
years following the first year in which the "Approved Enterprise" has Israeli 
taxable income (after using any available net operating losses). The period 
of benefits cannot extend beyond 12 years from the year of commencement of 
operations or 14 years from the year in which approval was granted, whichever 
is earlier. The tax benefits derived from a certificate of approval for an 
"Approved Enterprise" relate only to taxable income attributable to such 
"Approved Enterprise" and are conditioned upon fulfillment of the conditions 
stipulated by the Investment Law, the regulations promulgated thereunder and 
the criteria set forth in the certificate of approval. In the event of a 
failure by the Company to comply with these conditions, the tax benefits 
could be canceled, in whole or in part, and the Company would be required to 
refund the amount of the canceled benefits, adjusted for inflation and 
interest. There can be no assurance that the Company's Israeli production 
facility will continue to operate or qualify as an "Approved Enterprise" or 
that the benefits under the "Approved Enterprise" regulations will continue, 
or be applicable, in the future. The loss of, or any material decrease in, 
these income tax benefits could have a material adverse effect on the 
Company's business, financial condition and results of operations. 

DEPENDENCE ON KEY PERSONNEL

The Company's future success depends in large part on the continued service 
of its key technical and management personnel and its ability to continue to 
attract and retain highly-skilled technical, sales and marketing and 
management personnel. The Company has entered into employment agreements with 
certain of its executive officers, however, such agreements do not guarantee 
the services of these employees and do not contain noncompetition provisions. 
Competition for personnel in the software industry in general, and the 

                                       -24-

<PAGE>

EDA industry in particular, is intense, and the Company has at times in the 
past experienced difficulty in recruiting qualified personnel. There can be 
no assurance that the Company will retain its key personnel or that it will 
be successful in attracting and retaining other qualified technical, sales 
and marketing and management personnel in the future. The loss of any key 
employees or the inability to attract and retain additional qualified 
personnel may have a material adverse effect on the Company's business, 
financial condition and results of operations. The Company does not carry 
"key person" life insurance on any of its key personnel. Additions of new 
personnel and departures of existing personnel, particularly in key 
positions, can be disruptive and can result in departures of additional 
personnel, which could have a material adverse effect on the Company's 
business, financial condition and results of operations. 

ISRAELI RESEARCH, DEVELOPMENT AND MARKETING GRANTS

Summit's Israeli subsidiary has obtained research and development grants from 
the Office of the Chief Scientist (the "Chief Scientist") in the Israeli 
Ministry of Industry and Trade of approximately $232,000 and $608,000 in 1993 
and 1995, respectively. As of September 30, 1997, the Company was obligated 
to pay back approximately $232,000 and $470,000 for the 1993 and 1995 grants, 
respectively. Such obligations are collateralized by all tangible and 
intangible assets of the Israeli subsidiary. The terms of the grants prohibit 
the manufacture of products developed under these grants outside of Israel 
and the transfer of the technology developed pursuant to these grants to any 
person, without the prior written consent of the Chief Scientist. The 
Company's Visual HDL for VHDL products have been developed under grants from 
the Chief Scientist and thus are subject to these restrictions. If the 
Company is unable to obtain the consent of the government of Israel, the 
Company would be unable to take advantage of potential economic benefits such 
as lower taxes, lower labor and other manufacturing costs and advanced 
research and development facilities that may be available if such technology 
and manufacturing operations could be transferred to locations outside of 
Israel. In addition, the Company would be unable to minimize risks particular 
to operations in Israel, such as hostilities involving Israel.  Although the 
Company is eligible to apply for additional grants from the Chief Scientist, 
it has no present plans to do so. The Company also received a Marketing Fund 
Grant from the Israeli Ministry of Industry and Trade for an aggregate of 
$423,000. The grant must be repaid at the rate of 3% of the increase in 
exports over the 1993 export level of all Israeli products, until repaid. As 
of September 30, 1997, approximately $364,000 was outstanding under the grant.

LIMITATIONS ON PROTECTION OF INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS

The Company's success depends in part upon its proprietary technology. The 
Company relies on a combination of copyright, trademark and trade secret 
laws, confidentiality procedures, licensing arrangements and technical means 
to establish and protect its proprietary rights. As part of its 
confidentiality procedures, the Company generally enters into non-disclosure 
agreements with its employees, distributors and corporate partners, and 
limits access to, and distribution of, its software, documentation and other 
proprietary information. In addition, the Company's products are protected by 
hardware locks and software encryption techniques designed to deter 
unauthorized use and copying. Despite these precautions, it may be possible 
for a third party to copy or otherwise obtain and use the Company's products 
or technology without authorization, or to develop similar technology 
independently.

The Company provides its SLDA products to end-users primarily under 
"shrink-wrap" license agreements included within the packaged software. In 
addition, the Company delivers certain of its verification products 
electronically under an electronic version of a "shrink-wrap" license 
agreement. These "shrink-wrap" license agreements are not negotiated with or 
signed by the licensee, and thus may not be enforceable in certain 
jurisdictions.  In addition, the laws of some foreign countries do not 
protect the Company's proprietary rights as fully as do the laws of the 
United States. There can be no assurance that the Company's means of 
protecting its proprietary rights in the United States or abroad will be 
adequate or that competitors will not independently develop similar 
technology.

The Company could be increasingly subject to infringement claims as the 
number of products and competitors in the Company's industry segment grows, 
the functionality of products in its industry segment overlaps and an 
increasing number of software patents are granted by the United States Patent 
and Trademark Office. There can be no assurance that a third party will not 
claim such infringement by the Company with respect to current or future 
products. Any such claims, with or without merit, could be time-consuming, 
result 

                                       -25-

<PAGE>

in costly litigation, cause product delays or require the Company to enter 
into royalty or licensing agreements. Such royalty or license agreements, if 
required, may not be available on terms acceptable to the Company or at all. 
Failure to protect its proprietary rights or claims of infringement could 
have a material adverse effect on the Company's business, financial condition 
and results of operations.

POSSIBLE VOLATILITY OF STOCK PRICE

The stock markets have experienced price and volume fluctuations that have 
particularly affected technology companies, resulting in changes in the 
market prices of the stocks of many companies which may not have been 
directly related to the operating performance of those companies. Such broad 
market fluctuations may adversely affect the market price of the Common 
Stock.  In addition, factors such as announcements of technological 
innovations or new products by the Company or its competitors, market 
conditions in the computer software or hardware industries and quarterly 
fluctuations in the Company's operating results may have a significant 
adverse effect on the market price of the Company's Common Stock.


                                       -26-


<PAGE>

PART II

Item 1.  Legal Proceedings

         Not applicable

Item 2.  Changes in Securities and Use of Proceeds

         (c)  In July and September 1997, the Company issued and sold 4,780 and
              25,671 shares of the Company's Common Stock that were not 
              registered under the Securities Act of 1933, as amended (the
              "Securities Act"), at prices of $0.33 and $1.95, respectively 
              upon exercise of stock options. In September 1997, in connection 
              with the Company's acquisition of SimTech, the Company issued 
              1,256,777 shares of the Company's Common Stock to the existing 
              shareholders of SimTech in exchange for outstanding shares of 
              capital stock of SimTech. The shares were not registered under the
              Securities Act, and such issuances were deemed to be exempt from 
              registration in reliance on Section 4(2) of the Securities Act as 
              a transaction not involving a public offering. The recipients of 
              the securities represented their intentions to acquire the 
              securities for investment only and had access to all relevant 
              information regarding the Company necessary to evaluate the 
              investment.

         (d)  The effective date of the Company's first registration 
              statement, filed on Form S-1 under the Securities Act of 1933 
              (No. 333-6445), was October 17, 1996 (the "Registration 
              Statement"). The class of securities registered was Common 
              Stock. The offering commenced on October 18, 1996 and all 
              securities were sold in the offering. The managing underwriters 
              for the offering were Robertson, Stephens & Company LLC and 
              Needham & Company.

                  A total of 4,600,000 shares were registered pursuant to 
              the Registration Statement. The Company sold 2,000,000 shares 
              of its Common Stock for its own account, for an aggregate 
              offering price of $19,000,000, and 2,600,000 shares of its 
              Common Stock for the account of certain selling stockholders, 
              for an aggregate offering price of $24,700,000.

                  The Company incurred expenses of approximately $2,776,000, 
              of which $1,330,000 represented underwriting discounts and 
              commissions and $1,446,000 represented estimated other 
              expenses. A portion of the underwriting discounts and 
              commissions represented direct or indirect payments to 
              directors, officers, general partners of the Reigstrant or 
              their associates; to persons owing ten (10) percent or more of 
              any class of equity securities of the Company; or to affiliates 
              of the Company. The net offering proceeds to the Company after 
              total expenses was $16,224,000.

                  As of September 30, 1997, the Company had used all of the 
              net proceeds from the offering as follows:  $897,000 for the 
              purchase and installation of machinery and quipment, $473,000 
              for the repayment of indebtedness and $14,854,000 for working 
              capital. The use of the proceeds from the offering does not 
              represent a material change in the use of proceeds described in 
              the prospectus.

Item 3.  Defaults Upon Senior Securities

         Not applicable

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

         Not applicable

Item 5.  Other Information

         Not applicable

Item 6   Exhibits and Reports on Form 8-K

         (a)  Exhibits

              10.15  Bank Line of Credit Agreement between Registrant and U.S.
                     National Bank of Oregon dated June 24, 1997.
              10.22  Loan Agreement between Registrant and Dasys, Inc. dated 
                     July 16, 1997.
              11.1   Statement of Computation of Net Income per Share
              27     Financial Data Schedule
    
         (b)  Reports on Form 8-K
    
              On September 24, 1997, the Company filed a report  on Form 8-K 
              dated September 9, 1997 in conjunction with the acquisition of 
              Simulation Technologies, Corp. ("SimTech").  On November 12, 
              1997, the Company amended this filing on Form 8-K /A to include 
              the financial statements of SimTech and the pro forma combined 
              financial statements for the Company and SimTech.
    
         
                                       -27-

<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.

                             SUMMIT DESIGN, INC.


                             By:     /s/  C. Albert Koob   
                                   -------------------------

                                  C. Albert Koob
                                  Vice President - Finance, 
                                  Chief Financial Officer and Secretary
                                  (Principal Financial and Accounting
                                  Officer and Duly Authorized Officer)


Date:    November 13, 1997

                                       -28-

<PAGE>

EXHIBIT INDEX







EXHIBIT 10.15 Bank Line of Credit Agreement between Registrant and U.S. 
              National Bank of Oregon dated June 24, 1997.



EXHIBIT 10.22 Loan Agreement between Registrant and Dasys, Inc. dated 
              July 16, 1997.



EXHIBIT 11.1  Statement of Computation of Net Income Per Share



EXHIBIT 27    Financial Data Schedule


                                       -29-




<PAGE>


Exhibit 10.15       Bank Line of Credit Agreement between Registrant
                    and U.S. National Bank of Oregon dated June 24, 1997.








April 9, 1997
                             
C. Albert Koob
Chief Financial Officer
Art Fletcher                      
Treasurer and Director of Financial Planning
Summit Design, Inc.
9305 S.W. Gemini Drive
Beaverton, OR  97005-7158

Gentlemen:

I am pleased to advise you that United States National Bank of Oregon 
("Bank") has approved the request of Summit Design, Inc. ("Summit"), for the 
following credit facilities,  subject to the following terms and conditions:


                               OPERATING LINE OF CREDIT
                               ------------------------
                                       
BORROWER:           Summit Design, Inc.

PURPOSE:            General Corporate Purposes.

BORROWING LIMIT:    $1,000,000.00

GUARANTORS:         None

EXPIRY:             April 30, 1998.

RATE:               Pricing will be based on United States National Bank of 
                    Oregon's Prime (1), or Inter Bank Offering Rate ("IBOR"), 
                    at the Borrower's option.  Rate will be fully floating and
                    computed on a 360-day year.  The spread over the base rates
                    will be determined quarterly by the Borrower's Total
                    Liabilities/Tangible Net Worth ("D/TNW"), as expressed in 
                    the chart below.


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


(1)  The interest rate charged to Borrower is tied to the Prime Rate of United 
     States National Bank of Oregon, Borrower is advised that United States 
     National Bank's Prime Rate is the rate of interest which the Bank from
     time to time identifies and publicly announces as its Prime Rate, and is 
     not necessarily, for example the lowest rate of interest which the Bank 
     collects from any borrower or group of borrowers.



<PAGE>

Summit Design, Inc.
4/9/97
Page 2


                 DEBT TO TANGIBLE NET WORTH IS DEFINED AS (TOTAL LIABILITIES 
                 MINUS UNEARNED REVENUE) / (SHAREHOLDERS' EQUITY MINUS 
                 INTANGIBLES).

- -------------------------------------------------------------------------
         DEBT/WORTH              PRIME PRICING         IBOR PRICING
       Greater than 0.50        Prime + 0.75%         IBOR + 300 bps
         .26 to .050            Prime + 0.50%*        IBOR + 275 bps
       Less than 0.26           Prime +   0%          IBOR + 225 bps
- -------------------------------------------------------------------------

                          *  At 12/31/96 the D/TNW was 0.27:1.00.

                 IBOR Terms:
    
                 A) Minimum Amount of $500,000, increments of $100,000 
                    thereafter.
                 B) Maturity and availability: Up to three months; may not 
                    exceed Expiry.
                 C) Prepayment of IBOR Borrowings not permitted.
                 D) Notification: Two day notification prior to 12:00 noon on 
                    the day of notification.
                 E) Irrevocability:  Acceptance of a pricing commitment from 
                    the Bank will constitute an irrevocable agreement to 
                    borrow under the revolving line of credit.
                 F) Interest computed on the basis of a 360 day year and the 
                    number of days elapsed.

REPAYMENT TERMS: Interest shall be payable monthly on the 1st day of each month.
                 Principal shall be payable on the earlier of April 30, 1998, or
                 demand by the Bank.  Repayment of each advance received by 
                 Borrower under the line of credit is subject to the terms of 
                 the promissory note evidencing that advance, as well as all 
                 terms and conditions of this letter.  In the event of any 
                 conflict between the two, the terms and conditions of the 
                 promissory note shall control.


FEES:            UP-FRONT FEE:  Initial up-front fee of 1/8 of 1% of the amount
                 of the line of credit, due upon acceptance  ($1,250).


                 COMMITMENT FEE:  A 1/8 of 1% fee, annualized, on the unused 
                 portion of the line of credit, payable quarterly in arrears.


<PAGE>

Summit Design, Inc.
4/9/97
Page 3


COLLATERAL:      The revolving line of credit provides for a flexible collateral
                 position according to the following matrix.  The assets of the
                 Borrower which are referenced below include a first lien 
                 position in all accounts, contract rights, chattel paper, 
                 general intangibles and inventory.


QUICK RATIO*     COLLATERAL

GREATER THAN
1.75:1.00        Unsecured with negative pledge agreement.

LESS THAN OR
EQUAL TO
1.75:1.00        UNSECURED WITH NEGATIVE PLEDGE, IF NOT BORROWING. If borrowing
                 and the ratio falls in this category, the line of credit will 
                 be secured.

LESS THAN OR
EQUAL TO
1.25 : 1.00      UNSECURED WITH NEGATIVE PLEDGE, IF NOT BORROWING.  If 
                 borrowing, line is secured and advances are margined at 75% of
                 eligible A/R up to 120 days after date of invoice.  

                 *  QUICK RATIO IS DEFINED AS ((CASH + NET TRADE ACCOUNTS) / 
                    (CURRENT  LIABILITIES - CURRENT PORTION OF UNEARNED 
                    REVENUE)).
                   

DOCUMENTATION:   Execution of Notes, Loan Agreements, Security Agreements, UCC
                 Financing Statements and all other documentation required by 
                 the Bank in a form satisfactory to the Bank.


BORROWER WILL COMPLY WITH THE FOLLOWING QUARTERLY FINANCIAL COVENANTS:
      
                 1. TANGIBLE NET WORTH shall not be less then $10,000,000. 
                    TANGIBLE NET WORTH IS DEFINED AS (SHAREHOLDER'S EQUITY 
                    -INTANGIBLES).  NOTE: INTANGIBLES INCLUDE ALL CAPITALIZED
                    SOFTWARE.
         
                 2. TOTAL LIABILITIES TO TANGIBLE NET WORTH  shall not exceed 
                    .75 to 1.00.  TOTAL LIABILITIES TO TANGIBLE NET WORTH IS 
                    DEFINED AS (TOTAL LIABILITIES MINUS DEFERRED REVENUE)/
                    (TANGIBLE NET WORTH). 
    
                 Failure to maintain these covenants will be considered an event
                 of default under the loan documents.  
    
OTHER TERMS AND CONDITIONS:

                 1. Distribution in the form of dividends shall not exceed 25% 
                    of net income, measured annually as of December 31.
    

<PAGE>

Summit Design, Inc.
4/9/97
Page 4


REPORTING REQUIREMENTS: 

                   - Quarterly financial statements to be submitted within 45 
                     days of quarter end.
                   - Annual CPA audited financial statements to be submitted
                     within 90 days of fiscal year end.
                   - If the Quick Ratio falls to 1.25:1.00 or below:  A 
                     Borrower's Certificate will be submitted with each advance,
                     and a Borrower's Certificate will accompany the monthly AR
                     and AP agings.

              
ADVANCE STRUCTURE: Advances will be limited to the Borrowing Limit when the
                   Quick Ratio is greater than 1.25:1.00. When the quick ratio
                   is less than or equal to 1.25: 1.00, advances will be 
                   limited to 75% of eligible accounts receivable to 120 days 
                   after the date of invoice.

                   Disbursements under the line of credit shall terminate on the
                   earlier occurrence of the date indicated above as the Expiry 
                   Date or the date on which this Bank, in its sole discretion,
                   determines that there has been a material adverse change in 
                   the financial condition or management of the Borrower, or 
                   determines that there has been any non-compliance with any 
                   term or condition stated herein.  Non-compliance with the 
                   conditions and terms of this letter and all other loan 
                   documents will be considered as an event of default, 
                   entitling the Bank to all the default provisions as provided
                   for in documents evidencing this line of credit.


OTHER:             Under Oregon law, most agreements, promises and commitments
                   made by lenders after October 3, 1989, concerning loans and 
                   other credit extensions which are not for personal, family 
                   or household purposes or secured solely by the borrower's 
                   residence must be in writing, express consideration and be 
                   signed by the lender to be enforceable.


If the above terms and conditions to extend this credit facility to Summit 
Design, Inc. are acceptable to you, please sign and return the Acknowledgment 
Copy of this letter on or before June  30, 1997.


<PAGE>

Summit Design, Inc.
4/9/97
Page 5


We are pleased to provide you this borrowing accommodation and look forward 
to serving your banking needs in the future.

Sincerely,




Daniel J. Hempy
Senior Vice President


BY OREGON STATUTE (ORS 41.580), THE FOLLOWING DISCLOSURE IS REQUIRED: UNDER 
OREGON LAW MOST AGREEMENTS PROMISES AND COMMITMENTS MADE BY LENDERS AFTER 
OCTOBER 3, 1989 CONCERNING LOANS AND OTHER CREDIT EXTENSIONS WHICH ARE NOT 
FOR PERSONAL, FAMILY, OR HOUSEHOLD PURPOSE OR SECURED SOLELY BY THE 
BORROWER'S RESIDENCE MUST BE IN WRITING, EXPRESS CONSIDERATION AND BE SIGNED 
BY THE LENDER TO BE ENFORCEABLE.

THE UNDERSIGNED HEREBY ACKNOWLEDGES AND ACCEPTS THIS OFFER TO EXTEND CREDIT 
SUBJECT TO THE TERMS AND CONDITIONS STATED ABOVE.

SUMMIT DESIGN, INC.

BY: /s/ C. Albert Koob  Chief Financial Officer       6/18/97  
    -------------------------------------------       -------
                               Title                    Date

<PAGE>

Summit Design, Inc.
4/9/97
Page 6








June 24, 1997

C. Albert Koob
Chief  Financial Officer
Art Fletcher
Treasurer and Director of Financial Planning
Summit Design, Inc.
9305 S.W. Gemini Drive
Beaverton, OR 97005-7158

Gentlemen:

Please find enclosed the  " Alternative Rate Options Promissory Note" to
    complete the documentation necessary for Summit Design's Operating Line of
    Credit.  Please sign where indicated and return to me.

If you have any questions or comments please call me or Dan Hempy, at 275-5172
    or 275-5879, respectively.

We are pleased to provide you this borrowing accommodation and look forward to
    serving your banking needs in the future.

Sincerely,


Richard Glassman
Assistant Relationship Manager




<PAGE>

Summit Design, Inc.
4/9/97
Page 7



THIS EXHIBIT IS ATTACHED TO AND MADE A PART OF THAT CERTAIN PROMISSORY NOTE FOR
    $1,000,000.00 DATED JUNE 23, 1997 FROM SUMMIT DESIGN, INC. TO US BANK.


                                           
                                     EXHIBIT "A"
                                PERFORMANCE PRICING:

Pricing to be based upon Borrower's ratio of debt to worth, at the
    Borrower's Option, as expressed in the following matrix.  The spread
    over the base rates will be determined quarterly beginning
    September 30, 1997.

DEBT/WORTH                        PRIME PRICING                 IBOR PRICING
- ----------                        -------------                 ------------
- -Greater than or equal to-0.51        Prime + 75%                       3.00%
0.26 to .050                      Prime + .50%                  2.75%
- -Less than or equal to-0.25           Prime + 0.00%
                              2.25%

The initial Prime option is Prime + 0.50%. ;  Current IBOR Pricing is +2.75%

Debt to Tangible Net Worth is defined as ( Total Liabilities - Unearned 
    Revenue)  /  (Shareholder's Equity - Intangibles).

Summit Design, Inc.


BY:  /s/ C. Albert Koob        
     ------------------
     Authorized Officer







<PAGE>

Summit Design, Inc.
4/9/97
Page 8

                               ALTERNATIVE RATE OPTIONS
                                   PROMISSORY NOTE
                                 (PRIME RATE, LIBOR)
                                       
$1,000,000.00                                         Dated as of: 06-23-97
- -----------------------------------------------------              --------
Summit Design, Inc.                                        ("Borrower")
- -----------------------------------------------------
U.S. BANK                                                   ("Lender")

1.  TYPE OF CREDIT.  This note is given to evidence Borrower's obligation to 
    repay all sums which lender may from time to time advance to Borrower 
    ("Advances") under a:
    / / single disbursement loan.  Amounts loaned to Borrower hereunder will 
                be disbursed in a single Advance in the amount shown in 
                Section 2.
    /x/ revolving line of credit.  No Advances shall be made Which create a 
                maximum amount outstanding at any one time which exceeds the 
                maximum amount shown in Section 2.  However, Advances hereunder 
                may be borrowed , repaid and reborrowed, and the aggregate 
                Advances loaned hereunder from time to time may exceed such 
                maximum amount.
    / / non-revolving line of credit.  Each Advance made from time to time 
                hereunder shall reduce the maximum amount available shown in 
                Section 2. Advances loaned hereunder which are repaid may not 
                be reborrowed.

2.  PRINCIPAL BALANCE.  The unpaid Principal balance of all Advances 
    outstanding under this note ("Principal Balance") at one time shall not 
    exceed $ 1,000,000.00.
           ---------------

3.  PROMISE TO PAY.  For value received Borrower promises to pay Lender or    
    order at OR COMMERCIAL LOAN SERVICING, 555 SW OAK, PL-7 PORTLAND, OR     
    97204, the Principal Balance of this note, with interest thereon at the   
    rate(s) specified in Sections 4 and 11 below.

4.  INTEREST RATE.  The interest rate on the Principal Balance outstanding 
    may vary from time to time pursuant to the provisions of this note.  
    Subject to the provisions of this note, Borrower shall have the option 
    from time to time of choosing to pay interest at the rate or rates and 
    for the applicable periods of time based on the rate options provided 
    herein; PROVIDED, however, that once Borrower notifies Lender of the rate 
    option chosen in accordance with the provisions of this note, such notice 
    shall be irrevocable.  The rate options are the Prime Borrowing Rate and 
    the LIBOR Borrowing Rate, each as defined herein.
   
    (a)  DEFINITIONS.  The following terms shall have the following meanings:
         
                 "Business Day" means any other day than a Saturday, Sunday, 
or other day that commercial banks in Portland, Oregon or New York City are 
authorized or required by law to close; provided, however that when used in 
connection with a LIBOR Rate, LIBOR Amount,

<PAGE>

Summit Design, Inc.
4/9/97
Page 9

or LIBOR Interest Period such term shall also exclude any day on which dealings
in U.S. dollar deposits are not carried on in the London interbank market.
         
                 "LIBOR Amount" means each principal amount for which 
Borrower chooses to have the LIBOR Borrowing Rate apply for any specified 
LIBOR Interest Period.

                 "LIBOR Interest Period" means as to any LIBOR amount, a 
period of 1,2 OR 3 months commencing on the date the LIBOR Borrowing Rate 
becomes applicable thereto; PROVIDED, however, that: (I)  the first day of 
each LIBOR Interest Period must be a Business Day; (ii) no LIBOR Interest 
Period shall be selected which would extend beyond EXPIRY; (iii) no LIBOR 
Interest Period shall extend beyond the date of any principal payment 
required under section 6 of this note, unless the sum of the Prime Rate 
Amount, plus LIBOR Amounts with LIBOR Interest Periods ending on or before 
the scheduled date of such principal payment, plus principal amounts 
remaining unborrowed under a line of credit, equals or exceeds the amount of 
such principal payment; (iv) any LIBOR Interest Payment which would otherwise 
expire on a day which is not a Business Day, shall be extended to the next 
succeeding Business Day, unless the result of such extension would be to 
extend such LIBOR Interest Period into another calendar month, in which event 
the LIBOR Interest Period shall end on the immediately preceding Business 
Day; and (v) any LIBOR Interest Period that begins on the last Business Day 
of a calendar month (or on a day for which there is no numerically 
corresponding day in the calendar month at the end of such LIBOR Interest 
Period) shall end on the last Business Day of a calendar month. 

                 "LIBOR Rate" means, for any LIBOR Interest Period, the rate 
          per annum (computed on the basis of a 360-day year and the actual 
          number of days elapsed and rounded upward to the nearest 1/16 of 
          1%) established by Lender as its LIBOR Rate, based on Lender's 
          determination, on the basis of such factors as Lender deems 
          relevant, of the rate of interest at which U.S. dollar deposits 
          would be offered to U.S. Bank in the London interbank market at 
          approximately 11 a.m. London time on the date which is two Business 
          Days prior to the first day of such LIBOR Interest Period for 
          delivery on the first day of such LIBOR Interest Period for the 
          number of months therein; provided, however, that the LIBOR Rate 
          shall be adjusted to take into account the maximum reserves 
          required to be maintained for Eurocurrency liabilities by banks 
          during each such LIBOR Interest Period as specified in Regulation D 
          of the Board of Governors of the Federal Reserve System or any 
          successor regulation.
        
"Prime Rate" means the rate of interest which Lender from time to time 
          establishes as its prime rate and is not, for example, the lowest 
          rate of interest which Lender collects from any borrower or class 
          of borrowers. When the Prime Rate is applicable under section 4 (b) 
          or 11 (b), the interest rate hereunder shall be adjusted without 
          notice effective on the day the Prime Rate changes, but in no event 
          shall the rate of interest be higher than allowed by law.

"Prime Rate Amount" means any portion of the Principal Balance bearing 
          interest at the Prime Borrowing Rate.

<PAGE>

Summit Design, Inc.
4/9/97
Page 10



    (b)  THE PRIME BORROWING RATE.

              (i)   The Prime Borrowing Rate is a per annum rate equal to the 
                    Prime Rate plus SEE ATTACHED EXHIBIT "A" % per annum.
             (ii)   Whenever Borrower desires to use the Prime Borrowing Rate 
                    option, Borrower shall give Lender notice orally or in 
                    writing in accordance with Section 15 of this note, which 
                    notice shall specify the requested effective date (which 
                    must be a Business Day) and principal amount of the 
                    Advance or increase in the Prime Rate Amount, and whether 
                    Borrower is requesting a new Advance under a line of 
                    credit or conversion of a LIBOR Amount to the Prime 
                    Borrowing Rate.
           (iii)    Subject to Section 11 of this note, interest shall accrue 
                    on the unpaid Principal Balance at the Prime Borrowing 
                    Rate unless and except to the extent that the LIBOR 
                    Borrowing Rate is in effect.

    (c)  THE LIBOR BORROWING RATE.
             (i)    The LIBOR Borrowing Rate is the LIBOR Rate plus SEE 
                    ATTACHED EXHIBIT "A" %  per annum.

            (ii)    Borrower may obtain LIBOR Borrowing Rate quotes from 
                    Lender between 8:00 a.m. and 10:00 a.m. ( Portland, 
                    Oregon time) on any Business Day. Borrower may request an 
                    Advance, conversion of any portion of the Prime Rate 
                    Amount to a LIBOR amount or a new LIBOR Interest Period 
                    for an existing LIBOR Amount, at such rate only by giving 
                    Lender notice in accordance with Section 4 ( c ) (iii) 
                    before 10:00 a.m. ( Portland, Oregon time) on  such day.

           (iii)    Whenever Borrower desires to use the LIBOR Borrowing Rate 
                    option, Borrower shall give Lender irrevocable notice ( 
                    either in writing or orally and promptly confirmed in 
                    writing) between 8:00a.m. and 10:00 a.m. (Portland, 
                    Oregon time) two (2) business days prior to the desired 
                    effective date of such rate. Any oral notice shall be 
                    given by, and any written notice or confirmation of an 
                    oral notice shall be signed by, the person (s) authorized 
                    in Section 15 of this note, and shall specify the 
                    requested effective date of the rate, LIBOR Interest 
                    Period and LIBOR Amount, and whether Borrower is 
                    requesting a new Advance at the LIBOR Borrowing Rate 
                    under a line of credit, conversion of all or any portion 
                    of the Prime Rate Amount to a LIBOR Amount, or a new 
                    LIBOR Interest Period for an outstanding LIBOR Amount.  
                    Notwithstanding any other term of this note, Borrower may 
                    elect the LIBOR Borrowing Rate in the minimum principal 
                    amount of $500,000.00 and in multiples of $100,000.00 
                    above such amount; PROVIDED, however, that no more than 
                    N/A separate LIBOR Interest Periods may be in effect at 
                    any one time.

If at any time the LIBOR Rate is unascertainable or unavailable to Lender or if
LIBOR Rate loans become unlawful, the option to select the LIBOR Borrowing Rate
shall terminate immediately.  If the LIBOR Borrowing Rate is in effect, (A) it
shall terminate automatically with respect to all LIBOR Amounts (i) on the last
day of each then applicable LIBOR Interest Period,

<PAGE>

Summit Design, Inc.
4/9/97
Page 11



if  Lender may lawfully continue to maintain such loans, or (ii) immediately if
Lender may not lawfully continue to maintain such loans throuh such day, and
(B) subject to Section 11, the Prime Borrowing Rate automatically shall become
effective as to such amounts upon such termination.

       (iv)   If at any time after the date hereof  (A) any revision in or 
              adoption of any applicable law, rule, or regulation or in the 
              interpretation or administration thereof  (i)  shall subject 
              Lender or its Eurodollar lending office to any tax, duty, or 
              other charge, or change the basis of taxation of payments to 
              Lender with respect to any loans bearing interest based on the 
              LIBOR Rate, or (ii) shall impose or modify any reserve, 
              insurance, special deposit, or similar requirements against 
              assets of, deposits with or for the account of, or credit 
              extended by Lender or its Eurodollar lending office, or impose 
              on Lender or its Eurodollar lending office  any other 
              condition affecting any such loans, and (B) the result of any 
              of the forgoing is (i) to increase the cost to Lender of 
              making or maintaining any such loans or (ii) to reduce the 
              amount of any sum receivable under this note by Lender or its 
              Eurodollar lending office, Borrower shall pay Lender within 15 
              days after demand by Lender such additional amount as will 
              compensate Lender for such increased cost or reduction.  The 
              determination hereunder by Lender of such additional amount 
              shall be conclusive in the absence of manifest error.  If 
              Lender demands compensation under this Section 4  (c) (v), 
              Borrower may upon three (3) Business Days' notice to Lender 
              pay the accrued interest on all LIBOR Amounts, together with 
              any additional amounts payable under Section 4 (c)(vi). 
              Subject to Section 11, upon Borrower's paying such accrued 
              interest and additional costs, the Prime Borrowing Rate 
              immediately shall be effective with respect to the unpaid 
              principal balance of such LIBOR amounts.
    
       (v)    Borrower shall pay to Lender, on demand, such amount as Lender 
              reasonably determines (determined as though 100 % of the 
              applicable LIBOR Amount had been funded in the London 
              interbank market) is necessary to compensate Lender for any 
              direct or indirect losses, expenses, liabilities, costs, 
              expenses or reductions in yield to Lender, whether incurred in 
              connection with liquidation or re-employment of funds or 
              otherwise, incurred or sustained by Lender as a result of: (A) 
              Any payment or prepayment of a LIBOR Amount, termination of 
              the LIBOR Borrowing Rate or conversion of a LIBOR Amount to 
              the Prime Borrowing Rate on a day other than the last day of 
              the applicable LIBOR  Interest Period  (including  as a result 
              of acceleration or a notice persuant to Section 4 (c)(v)); or 
              (B) Any failure of Borrower to borrow, continue or prepay any 
              LIBOR Amount or to convert any portion of the Prime Rate 
              Amount to a LIBOR Amount after Borrower has given notice 
              thereof to Lender.
    
       (vi)   If Borrower chooses the LIBOR Borrowing Rate, Borrower shall pay 
              interest based on such rate, plus any other applicable taxes 
              or charges hereunder, even though Lender may have obtained the 
              funds loaned  to Borrower from sources other than the London 
              interbank market.  Lender's determination of the

<PAGE>

Summit Design, Inc.
4/9/97
Page 12



              LIBOR Borrowing Rate and any such taxes or charges shall be
              conclusive in the absence of manifest error.
    
       (vii)  Notwithstanding any other term of this note, Borrower may not 
              select the LIBOR Borrowing Rate if an event of default 
              hereunder has occurred and is continuing.
    
       (viii) Nothing contained in this note, including without limitation the
              determination of any LIBOR Interest Period or Lender's 
              quotation of any LIBOR Borrowing Rate, shall be construed to 
              prejudice Lender's right, if any, to decline to make any 
              requested Advance or to require payment on demand.

5.  COMPUTATION OF INTEREST .  All interest under Section 4 and Section 11 
    will e computed at the applicable rate based on a 360-day year and 
    applied to he actual number of days elapsed.

6.  PAYMENT SCHEDULE.
    (a)  PRINCIPAL. Principal shall be paid:
    /X/ on demand
    / / on demand. or if no demand, on______.
    / / on__________.
    / / subject to Section 8, in installments of
/ /____each, plus accrued interest, beginning on ____and on the same day of 
                       each ____ thereafter until ____ when the entire Principal
                       Balance plus interest thereon shall be due and payable.

                            / /____each, including accrued interest, beginning 
                       on____and on the same day of each____ thereafter until 
                       ____ when the entire Principal Balance plus interest 
                       thereon shall be due and payable.
/ /_________.
    (b)  INTEREST.
             (i)  Interest on the Prime Rate Amount shall be paid:
             /X/  on the first day of FEBRUARY, 1997 and on the same day of each
                  MONTH. thereafter prior to maturity and at maturity.
             / /  at maturity.
                            / / at the time each principal installment is due 
                                and at maturity.
                            / /______.
            (ii)  Interest on all LIBOR Amount shall be paid:

/X/  on the last day of the applicable LIBOR Interest Period, and if such LIBOR
                  Interest period is longer than three months, on the last day 
                  of each three month period occuring during such LIBOR 
                  Interest Period, and at maturity.
/X/  on the ____ day of _____ and on the same day of each ______ thereafter 
                  prior to maturity and at maturity. 
/ /  at maturity.
/ /  at the time each principal installment is due and at maturity.
/ /  ______.

7.  PREPAYMENT.
        (a)  Prepayments of all or any part of the Prime Rate Amount may be 
             made at any time without penalty.

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    (b)  Except as otherwise specifically set forth herein, Borrower may not
         prepay all or any part of any LIBOR Amount , or terminate any LIBOR
         Borrowing Rate except on the last day of the applicable LIBOR Interest
         Period.
    (c)  Principal prepayments will not postpone the date of or change the
         amount of any regularly scheduled payment.  At the time of any
         principal prepayment, all accrued interest, fees, costs, and expenses
         shall also be paid.
8.  CHANGE IN PAYMENT AMOUNT.  Each time the interest rate on this note changes
    the holder of this note may, from time to time, in holder's sole
    discretion, increase or decrease the amount of each of the installments
    remaining unpaid at the time of such change in rate to an amount holder in
    its sole discretion deems necessary to continue amortizing the Principal
    Balance at the same rate established by the installment amounts specified
    in Section 6(a), whether or not a "balloon" payment may also be due upon
    maturity of this note.  Holder shall notify the undersigned of each such
    change in writing.  Whether or not the installment amount is increased
    under this Section 8, Borrower understands that, as a result of increases
    in the rate of interest the final payment due, whether or not a "balloon" 
    payment, shall include the entire Principal Balance and interest thereon
    then outstanding,  and may be substantially more than the installment
    specified in Section 6.
9.  ALTERNATE PAYMENT DATE.  Notwithstanding any other term of this note, if in
    any month there is no day on which a scheduled payment would otherwise be
    due (e.g. February 31), such payment shall be paid on the last banking day
    of that month.
10. PAYMENT BY AUTOMATIC DEBIT.
/ / Borrower hereby authorizes Lender to automatically deduct the amount of all
                     principal and interest payments from account number _____ 
                     at _____.  If there are insufficient funds in the account
                     to pay the automatic deduction in full, Lender may allow
                     the account to become overdrawn, or Lender may reverse the
                     automatic deduction.  Borrower will pay all the fees on
                     the account which result from the automatic deductions,
                     including any overdraft and non-sufficient funds charges.
                     If for any reason Lender does not charge the account for
                     a payment, or if an automatic payment is reversed, the
                     payment is still due according to this note.  If the
                     account is a Money Market Account, the number of
                     withdrawals from that account is limited as set out in
                     the account agreement.  Lender may cancel the automatic
                     deduction at any time in its discretion.

Provided, however, if no account number is entered above, Borrower does not want
                     to make payments by automatic debit.

11. DEFAULT.
(a) Without prejudice to any right of Lender to require payment on demand or to
    decline to make any requested Advance, each of the following shall be an
    event of default: ( i )Borrower fails to make any payment when due. (ii)
    Borrower fails to perform or comply with any term, covenant or obligation
    in this note or any agreement related to this note, or in any other
    agreement or loan Borrower has with Lender. (iii) Borrower defaults under
    any loan, extension of credit, security agreement, purchase or sales
    agreement, or any other agreement,

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    in favor of any other creditor or person that may materially affect any of
    Borrower's property or Borrower's ability to repay this note or perform 
    Borrower's obligations under this note or any related documents. (iv) Any 
    representation or statement made or furnished to Lender by Borrower or on 
    Borrower's behalf is false or misleading in any material respect either 
    now or at the time made or furnished. (v) Borrower dies, becomes 
    insolvent, liquidates or dissolves, a receiver is appointed for any part 
    of Borrower's property, Borrower makes an assignment for the benefit of 
    creditors, or any proceeding is commenced either by Borrower or against 
    Borrower under any bankruptcy or insolvency laws. (vi) Any creditor tries 
    to take any of Borrower's property on or in which Lender has a lien or 
    security interest. This includes a garnishment of any of Borrower's 
    accounts with Lender. (vii)  Any of the events described in this default 
    section occurs with respect to any general partner in Borrower or any 
    guarantor of this note, or any guaranty of Borrower's indebtedness to 
    Lender ceases to be, or is asserted not to be, in full force and effect. 
    (viii) There is any material adverse change in the financial condition or 
    management of Borrower or Lender in good faith deems itself insecure with 
    respect to the payment or performance of Borrower's obligations to 
    Lender. If this note is payable on demand, the inclusion of specific 
    events of default shall not prejudice Lender's right to require payment 
    on demand or to decline to make any requested Advance.

(b) Without prejudice to any right of Lender to require payment on demand, upon
    the occurance of an event of default, Lender may declare the entire unpaid
    Principal Balance on this note and all accrued unpaid interest immediately
    due and payable, without notice.  Upon default, including failure to pay
    upon final maturity, Lender at its option, may also,  if permitted under
    applicable law, increase the interest rate on this note to a rate equal to
    the Prime Borrowing Rate plus 5%.  The interest rate will not exceed the
    maximum rate permitted by applicable law.  In addition, if any payment of
    principal or interest is 19 or more days past due, Borrower will be charged
    a late charge of 5% of the delinquent payment.

12. EVIDENCE OF PRICIPAL BALANCE; PAYMENT ON DEMAND.  Holder's records shall,
    at any time, be conclusive evidence of the unpaid Principal Balance and
    interest owing on this note.  Notwithstanding any other provisions of this
    note, in the event holder makes Advances hereunder which result in an
    unpaid Principal Balance on this note which at any time exceeds the maximum
    amount specified in Section 2, Borrower agrees that all such Advances, with
    interest, shall be payable on demand.

13. LINE OF CREDIT PROVISIONS.  If the type of credit indicated in Section 1 is
    a revolving line of credit or a non-revolving line of credit, Borrower
    agrees that Lender is under no obligation and has not committed to make any
    Advances hereunder.  Each Advance hereunder shall be made at the sole
    option of Lender.

14. DEMAND NOTE.  If this note is payable on demand, Borrower acknowledges and
    agrees that (a) Lender is entitled to demand Borrower's immediate payment
    in full of all amounts owing hereunder and (b) neither anything to the
    contrary contained herein or in any other loan documents (including but not
    limited to, provisions relating to defaults, rights of cure, default rate
    of interest, installment payments, late charges, periodic review of
    Borrower's financial condition, and covenants) nor any act of Lender
    pursuant to any such provisions shall limit or

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    impair Lender's right or ability to require Borrower's payment in full of
    all amounts owing hereunder immediately upon Lender's demand.

15. REQUESTS FOR ADVANCES
    (a)  Any Advance may be made or interest rate option selected upon the
         request of Borrower (if an individual), any of the undersigned (if
         Borrower consists of more than one individual), any person or persons
         authorized in subsection (b) of this Section 15, and any person or
         persons otherwise authorized to execute and deliver promissory notes
         to Lender on behalf of Borrower.
    (b)  Borrower hereby authorizes any ____ of the following individuals to
         request Advances and to select interest rate options:______unless
         Lender is otherwise instructed in writing.
    (c)  All Advances shall be disbursed by deposit directly to Borrower's
         account number ____at ____ brance of Lender, or by cashier's check
         issued to Borrower.
    (d)  Borrower agrees that Lender shall have no obligation to verify the
         identity of any person making any request pursuant to this Section 15,
         and Borrower assumes all risks of the validiy and authorization of
         such requests.  In consideration of Lender agreeing, at its sole
         discretion, to make Advances upon such requests, Borrower promises to
         pay holder, in accordance with the provisions of this note, the
         Principal Balanc together with interest thereon and other sums due
         hereunder, although any Advances may have been requested by a person
         or persons not authorized to do so.

16. PERIODIC REVIEW.  Lender will review Borrower's credit accomodations
    periodically.  At the time of the review, Borrower will furnish Lender with
    any additional information regarding Borrower's financial condition and
    business operations that Lender requests.  This information may include but
    is not limited to, financial statements, tax returns, lists of assets and
    liabilities, agings of receivables and payables, inventory schedules,
    budgets and forecasts.  If upon review, Lender, in its sole discretion,
    determines that there has been a material adverse change in Borrower's
    financial condition, Borrower will be in default.  Upon default, lender
    shall have all rights specified herein.

17. NOTICES.   Any notice hereunder may be given by ordinary mail, postage paid
    and addressed to Borrower at the last known address of Borrower as shown on
    holder's records.  If Borrower consists of more than one person,
    notification of any said persons shall be complete notification of all.

18. ATTORNEY FEES.  Whether or not litigation or arbitration is commenced,
    Borrower promises to pay all costs of collecting overdue amounts.  Without
    limiting the foregoing , in the event that holder consults an attorney
    regarding the enforcement of any of its rights under this note or any
    ocument securing the same, or if this note is placed in the hands of an
    attorney for collection or if suit or litigation is brought to enforse this
    note or any document securing the same, Borrower promises to pay all costs
    thereof including such additional sums as the court or arbitrator(s) may
    adjudge reasonable as attorney fees, including without limitation, costs
    and attorney fees incurred in any appellate court, in any proceeding under
    the

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    bankruptcy code, or in any receivership and post-judgement attorney
    fees incurred in enforcing any judgement.

19. WAIVERS; CONSENT.  Each party hereto, whether maker, co-maker, guarantor or
    otherwise, waives diligence, demand, presentment for payment, notice of
    non-payment, protest and notice of protest and waives all defenses based on
    suretyship or impairment of collateral.  Without notice to Borrower and
    without diminishing or affecting Lender's rights or Borrower's obligations
    hereunder, Lender may deal in any manner with any person who at any time is
    liable for, or provides any real or personal property collateral for, any
    indebtedness of Borrower to Lender, including the indebtedness evidenced by
    this note.  Without limiting the foregoing, Lender may, in its sole
    discretion: (a) make secured or unsecured loans to Borrower and agree to
    any number of waivers, modifications, extensions and renewals of any length
    of such loans, including the loan evidenced by this note; (b) impair,
    release (with or without substitution of new collateral), fail to perfect a
    security interest in, fail to preserve the value of, fail to dispose of in
    accordance with applicable law, any collateral provided by any person; (c) 
    sue, fail to sue, agree not to sue, release, and settle or compromise with,
    any person.

20. JOINT AND SEVERAL LIABILITY.  All undertakings of the undersigned Borrowers
    are joint and several and are binding upon any marital community of which
    any of the undersigned are members.  Holder's rights and remedies under
    this note shall be cumulative.

21. SEVERABILITY.  If any term or provision of this note is declared by a court
    of competent jurisdiction to be illegal, invalid or unenforceable for any
    reason whatsoever, such illegality, invalidity or unenforceability shall
    not affect the balance of the terms and provisions hereof, which terms and
    provisions shall remain binding and enforceable, and this note shall be
    construed as if such illegal, invalid or unenforcable provision had not
    been contained herein.

22. ARBITRATION.
    (a)  Either Lender or Borrower may require that all disputes, claims,
         counterclaims and defenses, including those based on or arising from
         any alleged tort ("Claims") relating in any way to this note or any
         transaction of which this note is a part ( the "Loan"), be settled by
         binding arbitration in accordance with the Commercial Arbitration
         Rules of the American Arbitration Association and Title 9 of the U.S.
         Code.  All claims will be subject to the statutes of limitation
         applicable if they were litigated.  This provision is void if the
         Loan, at the time of the proposed submission to arbitration, is
         secured by real property located outside of Oregon or Washington, or
         if the effect of the arbitration procedure ( as opposed to any Claims
         of Borrower) would be to materially impair Lender's ability to realize
         on any collateral securing the Loan.
    (b)  If arbitration occurs and each party's claim is less than $100,000,
         one neutral arbitrator will decide all issues; if any party's claim is
         $100,000 or more,three neutral arbitrators will decide all issues. 
         All arbitrators will be active Oregon State Bar members in good
         standing.  All arbitration hearings will be held in Portland, Oregon. 
         In addition to all other powers, the arbitrator(s) shall have the
         exclusive right to

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         determine all issues of arbitrability.  Judgment on
         any arbitration award may be entered in any court with jurisdiction.
    (c)  If either party institutes any judicial proceeding relating to the
         Loan, such action shall not be a waiver of the right to submit any
         Claim to arbitration.  In addition, each has the right before, during
         and after any arbitration to exercise any number of the following
         remedies, in any order or concurrently: (i) Setoff; (ii) self-help
         repossession; (iii) judicial or non-judicial foreclosure against real
         or personal property collateral;and (iv) provisional remedies,
         including injunction,  appointment of receiver, attachement, claim and
         delivery and replevin.
23. GOVERNING LAW.  This note shall be governed by and construed and enforced
    in accordance with the laws of the State of Oregon without regard to
    conflicts of law principles; PROVIDED, however, that to the extent that
    Lender has greater rights or remedies under Federal law, this provision
    shall not be deemed to deprive Lender of such rights and remedies as may be
    available under Federal law. 

24. DISCLOSURE.

UNDER OREGON LAW, MOST AGREEMENTS, PROMISES AND COMMITMENTS MADE BY LENDERS
                  AFTER OCTOBER 3, 1989 CONCERNING LOANS AND OTHER CREDIT
                  EXTENSIONS WHICH ARE NOT FOR PERSONAL, FAMILY OR HOUSEHOLD
                  PURPOSES OR SECURED SOLELY BY THE BORROWER'S RESIDENCE MUCT
                  BE IN WRITING, EXPRESS CONSIDERATION AND BE SIGNED BY THE
                  LENDER TO BE ENFORCEABLE.

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EACH OF THE UNDERSIGNED HEREBY ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS
            DOCUMENT.

SUMMIT DESIGN, INC.
- --------------------------------               --------------------------------
Borrower Name                                  Signature of Individual Borrower


 /s/  C. Albert Koob, Chief Financial Officer  --------------------------------
By                                    Title             Signature of Individual
                      Borrower


- --------------------------------               --------------------------------
By                                    Title             Signature of Individual
                      Borrower



For valuable consideration, Lender agrees to the terms of the arbitration
                      provision set forth in this note.

                                                   Lender
                      Name:__________________________
                             By:_________________________________
                             Title:______________________________
                                          Date

<PAGE>













                                    LOAN AGREEMENT

                                       BETWEEN

                                 SUMMIT DESIGN, INC.

                                         AND

                                     DASYS, INC.








                                    JULY 16, 1997



















<PAGE>

                                  TABLE OF CONTENTS

                                                                           PAGE
                                                                           ----
ARTICLE 1. INTERPRETATION. . . . . . . . . . . . . . . . . . . . . . . . . . 1

  1.1    Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
  1.2    GAAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
  1.3    Headings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
  1.4    Plural Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
  1.5    Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
  1.6    Governing Law . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
  1.7    Construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
  1.8    Entire Agreement. . . . . . . . . . . . . . . . . . . . . . . . . . 2
  1.9    Calculation of Interest and Fees. . . . . . . . . . . . . . . . . . 2
  1.10   Other Interpretive Provisions . . . . . . . . . . . . . . . . . . . 2

ARTICLE 2. LOANS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

  2.1    Terms; Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
  2.2    Interest Payments . . . . . . . . . . . . . . . . . . . . . . . . . 3
  2.3    Maturity; Payment of Outstanding Loans; Termination of Obligations. 3
  2.4    Proceeds of the Loans . . . . . . . . . . . . . . . . . . . . . . . 4
  2.5    Prepayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
  2.6    Other Payment Terms . . . . . . . . . . . . . . . . . . . . . . . . 5
  2.7    Note. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
  2.8    Loan Funding. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
  2.9    Security; Further Assurances. . . . . . . . . . . . . . . . . . . . 5

ARTICLE 3. REPRESENTATIONS AND WARRANTIES OF BORROWER. . . . . . . . . . . . 6

  3.1    Due Incorporation, Qualification, etc.. . . . . . . . . . . . . . . 6
  3.2    Authority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
  3.3    Enforceability. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
  3.4    Non-Contravention . . . . . . . . . . . . . . . . . . . . . . . . . 6
  3.5    Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
  3.6    No Violation or Default . . . . . . . . . . . . . . . . . . . . . . 6
  3.7    Litigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
  3.8    Title . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
  3.9    Financial Statements. . . . . . . . . . . . . . . . . . . . . . . . 7
  3.10   Equity Securities . . . . . . . . . . . . . . . . . . . . . . . . . 7
  3.11   No Agreements to Sell Assets. . . . . . . . . . . . . . . . . . . . 8
  3.12   Employee Benefit Plans. . . . . . . . . . . . . . . . . . . . . . . 8
  3.13   Other Regulations . . . . . . . . . . . . . . . . . . . . . . . . . 8
  3.14   Governmental Charges and Other Indebtedness . . . . . . . . . . . . 8
  3.15   Subsidiaries, etc.. . . . . . . . . . . . . . . . . . . . . . . . . 8
  3.16   Catastrophic Events; Labor Disputes . . . . . . . . . . . . . . . . 9


                                     -i-
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                                  TABLE OF CONTENTS
                                     (CONTINUED)

                                                                           PAGE
                                                                           ----
  3.17   No Material Adverse Effect. . . . . . . . . . . . . . . . . . . . . 9
  3.18   Accuracy of Information Furnished . . . . . . . . . . . . . . . . . 9
  3.19   Certain Agreements of Officers, Employees and Consultants . . . . . 9
  3.20   Contracts or Commitments; Indebtedness. . . . . . . . . . . . . . . 9
  3.21   GM Agreement. . . . . . . . . . . . . . . . . . . . . . . . . . . .10
  3.22   Transactions with Affiliates. . . . . . . . . . . . . . . . . . . .10
  3.23   Deposit Accounts and Investment Accounts. . . . . . . . . . . . . .10

ARTICLE 4. CONDITIONS TO CLOSING . . . . . . . . . . . . . . . . . . . . . .10

  4.1    Principal Loan Documents. . . . . . . . . . . . . . . . . . . . . .10
  4.2    Employment Agreements . . . . . . . . . . . . . . . . . . . . . . .11
  4.3    Amendment of Borrower Stock Option Plan . . . . . . . . . . . . . .11
  4.4    Amendment of GM Agreement.. . . . . . . . . . . . . . . . . . . . .11
  4.5    Representations and Warranties Correct. . . . . . . . . . . . . . .11
  4.6    Compliance Certificate. . . . . . . . . . . . . . . . . . . . . . .11
  4.7    Amendment to Articles of Incorporation. . . . . . . . . . . . . . .11
  4.8    Corporate Documents . . . . . . . . . . . . . . . . . . . . . . . .11
  4.9    Consents; Permits; Waivers. . . . . . . . . . . . . . . . . . . . .12
  4.10   Legal Matters . . . . . . . . . . . . . . . . . . . . . . . . . . .12
  4.11   Opinion of Counsel. . . . . . . . . . . . . . . . . . . . . . . . .12
  4.12   Financial Statements. . . . . . . . . . . . . . . . . . . . . . . .12
  4.13   Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
  4.14   Conditions to Lender's Obligation to Make Each Loan . . . . . . . .12
  4.15   Agreement to Deliver. . . . . . . . . . . . . . . . . . . . . . . .13

ARTICLE 5. COVENANTS OF BORROWER.. . . . . . . . . . . . . . . . . . . . . .13

  5.1    Affirmative Covenants . . . . . . . . . . . . . . . . . . . . . . .13
  5.2    Negative Covenants. . . . . . . . . . . . . . . . . . . . . . . . .15

ARTICLE 6. ADDITIONAL LENDER RIGHTS. . . . . . . . . . . . . . . . . . . . .17

  6.1    Notice of Events Not in Ordinary Course . . . . . . . . . . . . . .17
  6.2    Board of Directors. . . . . . . . . . . . . . . . . . . . . . . . .17
  6.3    Appraisal of Material Software. . . . . . . . . . . . . . . . . . .18
  6.4    Additional Actions in Connection with Borrower's Stock Option Plan.18

ARTICLE 7. EVENTS OF DEFAULT . . . . . . . . . . . . . . . . . . . . . . . .18

  7.1    Events of Default . . . . . . . . . . . . . . . . . . . . . . . . .18
  7.2    Rights of Lender upon Default . . . . . . . . . . . . . . . . . . .20

ARTICLE 8. CONFIDENTIAL INFORMATION. . . . . . . . . . . . . . . . . . . . .20

                                     -ii-

<PAGE>
                                  TABLE OF CONTENTS
                                     (CONTINUED)

                                                                           PAGE
                                                                           ----
ARTICLE 9. MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . .21

  9.1    Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
  9.2    Expenses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
  9.4    Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . .22
  9.5    Waivers; Amendments . . . . . . . . . . . . . . . . . . . . . . . .23
  9.6    Successors and Assigns. . . . . . . . . . . . . . . . . . . . . . .23
  9.7    Set-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
  9.8    No Third Party Rights . . . . . . . . . . . . . . . . . . . . . . .24
  9.9    Partial Invalidity. . . . . . . . . . . . . . . . . . . . . . . . .24
  9.10   Arbitration.. . . . . . . . . . . . . . . . . . . . . . . . . . . .24
  9.11   Counterparts. . . . . . . . . . . . . . . . . . . . . . . . . . . .24


SCHEDULE I   -  DEFINITIONS

SCHEDULE II  -  NOTICE OF BORROWING

SCHEDULE III -  DISCLOSURE SCHEDULE

SCHEDULE IV  -  BUDGET

EXHIBIT A    -  NOTE

EXHIBIT B    -  SECURITY AGREEMENT

EXHIBIT C    -  STOCK PLEDGE AGREEMENT

EXHIBIT D    -  INTELLECTUAL PROPERTY SECURITY AGREEMENT

EXHIBIT E    -  PURCHASE OPTIONS

EXHIBIT F    -  DISTRIBUTION AGREEMENT

EXHIBIT G    -  EMPLOYMENT AGREEMENT

EXHIBIT H    -  ESCROW AGREEMENT








                                     -iii-

<PAGE>

                                    LOAN AGREEMENT


       This LOAN AGREEMENT (this "LOAN AGREEMENT"), dated as of July 16, 1997 is
entered into by and between:

              (1)    Summit Design, Inc., a Delaware corporation ("LENDER"); and

              (2)    Dasys, Inc.,  a Pennsylvania corporation ("BORROWER").


                                       RECITALS

       A.     Borrower desires to obtain financing for working capital purposes.

       B.     Lender desires to assist Borrower by providing such financing
              subject to the terms and conditions of this Loan Agreement.


                                      AGREEMENT

       NOW, THEREFORE, in consideration of the foregoing and of the covenants,
conditions and agreements set forth herein, the parties agree as follows:


ARTICLE 1.    INTERPRETATION.

       1.1    DEFINITIONS.  Unless otherwise indicated in this Loan Agreement,
each term set forth in Schedule I, when used in this Loan Agreement, shall have
the respective meaning given to that term in Schedule I or in the provision of
this Loan Agreement referenced in Schedule I.

       1.2    GAAP.  Unless otherwise indicated in this Loan Agreement, all
accounting terms used in this Loan Agreement shall be construed, and all
accounting and financial computations hereunder or thereunder shall be computed,
in accordance with GAAP.  If GAAP changes during the term of this Loan Agreement
such that any covenants contained herein would then be calculated in a different
manner or with different components, Borrower and Lender agree to negotiate in
good faith to amend this Loan Agreement in such respects as are necessary to
conform those covenants as criteria for evaluating Borrower's financial
condition to substantially the same criteria as were effective prior to such
change in GAAP; PROVIDED, HOWEVER, that, until Borrower and Lender so amend this
Loan Agreement, all such covenants shall be calculated in accordance with GAAP
as in effect immediately prior to such change.

       1.3    HEADINGS.  Headings in this Loan Agreement and each of the other
Loan Documents are for convenience of reference only and are not part of the
substance hereof or thereof.

       1.4    PLURAL TERMS.  All terms defined in this Loan Agreement or any
other Loan Document in the singular form shall have comparable meanings when
used in the plural form and VICE VERSA.

<PAGE>

       1.5    TIME.  All references in this Loan Agreement and each of the other
Loan Documents to a time of day shall mean Oregon time, unless otherwise
indicated.

       1.6    GOVERNING LAW.  This Loan Agreement and each of the other Loan
Documents shall be governed by and construed in accordance with the laws of the
State of Delaware without reference to conflicts of law rules.

       1.7    CONSTRUCTION.  Each of this Loan Agreement and the other Loan
Documents is the result of negotiations among, and has been reviewed by,
Borrower, Lender and their respective counsel.  Accordingly, this Loan Agreement
and the other Loan Documents shall be deemed to be the product of all parties
hereto, and no ambiguity shall be construed in favor of or against Borrower or
Lender.

       1.8    ENTIRE AGREEMENT.  This Loan Agreement and each of the other Loan
Documents, taken together, constitute and contain the entire agreement of
Borrower and Lender and supersede any and all prior agreements, negotiations,
correspondence, understandings and communications among the parties, whether
written or oral, respecting the subject matter hereof.

       1.9    CALCULATION OF INTEREST AND FEES.  All calculations of interest
and fees under this Loan Agreement and the other Loan Documents for any period
shall include the first day of such period and exclude the last day of such
period.

       1.10   OTHER INTERPRETIVE PROVISIONS.  References in this Loan Agreement
to "Recitals," "Sections," "Paragraphs," "Subparagraphs," "Exhibits" and
"Schedules" are to recitals,  sections, paragraphs, subparagraphs, exhibits and
schedules herein and hereto unless otherwise indicated.  References in this Loan
Agreement and each of the other Loan Documents to any document, instrument or
agreement (a) shall include all exhibits, schedules and other attachments
thereto, (b) shall include all documents, instruments or agreements issued or
executed in replacement thereof, and (c) shall mean such document, instrument or
agreement, or replacement or predecessor thereto, as amended, modified and
supplemented from time to time and in effect at any given time.  The words
"hereof," "herein" and "hereunder" and words of similar import when used in this
Loan Agreement or any other Loan Document shall refer to this Loan Agreement or
such other Loan Document, as the case may be, as a whole and not to any
particular provision of this Loan Agreement or such other Loan Document, as the
case may be.  The words "include" and "including" and words of similar import
when used in this Loan Agreement or any other Loan Document shall not be
construed to be limiting or exclusive.


ARTICLE 2.    LOANS.

       2.1    TERMS; TIMING.  

              (a)    Subject to the terms and conditions of this Loan Agreement,
Lender agrees to advance to Borrower one or more term loans (each, a "LOAN" and
collectively, the "LOANS") in an aggregate principal amount not to exceed
$2,500,000.  Each Loan shall be in an amount of at least $50,000 or any integral
multiple of $10,000 in excess thereof and shall be made on a date at least five
(5) Business Days after the delivery to Lender in the manner specified in
Section 9.1 of a notice of borrowing in the form of Schedule II hereto (the
"NOTICE OF BORROWING"), which Notice of Borrowing shall have been approved in
accordance with Section 2.1(b) below prior to any obligation on the part of
Lender to provide such funds. 

                                    -2-

<PAGE>

              (b)    Except as provided in Section 2.1(b)(i) below, Borrower 
shall be entitled to submit not more than one Notice of Borrowing with 
respect to any calendar quarter.  In the event Borrower desires to draw down 
a Loan with respect to any calendar quarter, at least five (5) Business Days 
prior to the beginning of such calendar quarter, Borrower shall submit to the 
Budget Committee a Notice of Borrowing specifying in reasonable detail 
Borrower's estimated expenses and working capital requirements for such 
upcoming calendar quarter on a monthly basis, which expenses and working 
capital requirements shall be in accordance with the then-existing Budget.  
Disbursements of Loans may only be requested by Borrower in accordance with 
the then-existing Budget, and Lender shall have no obligation to make any 
Loan which is not in accordance therewith.  In addition, each Notice of 
Borrowing shall be subject to the review of the Budget Committee; provided, 
however that the Budget Committee shall not have the discretion to disapprove 
a Loan that is otherwise within the then-existing Budget.  The Budget 
Committee shall approve any qualified Notice of Borrowing within ten (10) 
days after the receipt thereof.  After review and approval by the Budget 
Committee, the Notice of Borrowing, including any adjustments mandated by the 
Budget Committee, shall be submitted to Lender for draw down of a Loan in 
accordance with Section 2.1(a) above.

                     (i)   Notwithstanding the provisions of Section 2.1(b),
Borrower may submit to the Budget Committee up to two (2) additional Notices of
Borrowing during any calendar quarter (a "Monthly Notice").  A Monthly Notice
must be submitted at least five (5) Business Days prior to the beginning of such
month and shall specify in reasonable detail Borrower's estimated expenses and
working capital requirements for such upcoming month, which expenses and working
capital requirements shall be in accordance with the then-existing Budget. 
Lender shall have no obligation to make any Loan which is not in accordance with
the then-existing Budget.  Each Monthly Notice shall be subject to the review of
the Budget Committee.  The Budget Committee shall approve any qualified Monthly
Notice within five (5) days after the receipt thereof.  After review and
approval by the Budget Committee, the Monthly Notice, including any adjustments
mandated by the Budget Committee, shall be submitted to Lender for draw down of
a Loan in accordance with Section 2.1(a) above.

       2.2    INTEREST PAYMENTS.  Borrower shall pay interest on the unpaid
principal amount of the Loans from the date of each such Loan until the Maturity
thereof, quarterly within thirty (30) days of the last Business Day of each
calendar quarter, beginning on September 30, 1997, and at Maturity, at a rate
per annum equal at all times to the Prime Rate (as in effect on the first day of
each new quarterly period) plus two  percent (2 %).  All computations of such
interest shall be based on a year of 360 days for actual days elapsed.

       2.3    MATURITY; PAYMENT OF OUTSTANDING LOANS; TERMINATION OF
OBLIGATIONS.  

              (a)    MATURITY DATE.  Unless earlier prepaid, all outstanding
Loans shall be due and payable on April 1, 2000 (the "MATURITY DATE"); provided,
however that no Loans shall be made after December 31, 1999.

              (b)    PAYMENT OF OUTSTANDING LOANS.  Unless earlier prepaid, on
the Maturity Date, Borrower shall repay all outstanding Loans, including all
unpaid fees, costs, expenses, accrued interest and principal (the "Aggregate
Loan Amount"), in lawful money of the United States and in same day or
immediately available funds; provided, however, that prior to the Maturity Date,
Borrower may, by vote of its shareholders including the affirmative votes of the
holders of a majority of the outstanding shares of preferred stock, elect to
repay the Aggregate Loan Amount by tendering to Lender one hundred percent
(100%) of Borrower's outstanding Equity Securities, duly endorsed in blank
pursuant to the Pledge Agreement.  In the event that the Fair Market Value of
Borrower is greater than the Aggregate Loan Amount, Lender shall pay to the
holders of Borrower's Equity Securities the difference between the Fair Market
Value of Borrower and the Aggregate Loan Amount.  Any such 

                                    -3-

<PAGE>

payment by Lender to holders of Borrower's Equity Securities shall 
be made, at the option of Lender, in cash or Lender Common Stock (valued at 
the Fair Market Value of Lender Common Stock).  In the event that the Fair 
Market Value of Borrower is less than the Aggregate Loan Amount, all 
Obligations of Borrower owing pursuant to this Loan Agreement and the Loan 
Documents shall be deemed to be satisfied completely upon tender of 
Borrower's Equity Securities to Lender, duly endorsed in blank.  Any payment 
by Lender pursuant to this Section 2.3(b), whether in cash or Lender Common 
Stock, shall be made in accordance with written instructions received from 
Borrower's Representatives, and upon such payment, Lender shall have no 
liability to any holder of Borrower's Equity Securities for any amounts 
otherwise payable hereunder.

                     (i)   REGISTRATION OF LENDER COMMON STOCK.  In the event
that Lender elects to deliver Lender Common Stock to holders of Borrower's
Equity Securities, pursuant to either Section 2.3(b) above or upon exercise of
the Purchase Options, Lender shall file within thirty (30) days of delivery of
such Lender Common Stock a registration statement on Form S-3 with the
Securities and Exchange Commission covering the shares of Lender Common Stock
received by the holders of Borrower's Equity Securities so as to permit the
public resale thereof.  Lender shall use its reasonable best efforts to have
such registration statement declared effective within sixty (60) days of the
filing of such registration statement.  Such registration shall be on
commercially reasonable terms applicable to "demand" registration rights as
shall be mutually agreed upon by Lender and holders of Borrower's Equity
Securities. Notwithstanding the foregoing, Lender shall have no obligation to
file such registration statement (A) prior to the later of (i) the Maturity Date
and (ii) thirty (30) days after the date of delivery of Lender Common Stock or
(B) if all shares of Lender Common Stock so issued may be sold by the holders
thereof within a three-month period pursuant to Rule 144 of the Securities Act
following the date as of which the registration statement would otherwise be
required to be filed hereunder. 

              (c)    TERMINATION OF OBLIGATIONS.  Nothing contained in Section
2.3(b) above shall be construed to obligate Lender to accept Borrower's Equity
Securities as payment for the Aggregate Loan Amount.  In the event Borrower
tenders the Equity Securities in accordance with Section 2.3 and Lender notifies
Borrower of its intention not to accept such Equity Securities as payment, the
Aggregate Loan Amount shall nonetheless be deemed to be satisfied in full and
Borrower shall have no further obligations under this Loan Agreement or any
other Loan Document, except that the Distribution Agreement will be modified in
accordance with the provisions contained therein. 

       2.4    PROCEEDS OF THE LOANS.  Borrower shall use the proceeds of the
Loans solely to satisfy current expense requirements and for general working
capital purposes.

       2.5    PREPAYMENTS.

              (a)    TERMS OF ALL PREPAYMENTS.  Upon the prepayment of any Loan
(whether such prepayment is an optional prepayment under Section 2.5(b) or a
mandatory prepayment required by any other provision of this Loan Agreement or
the other Loan Documents, including, without limitation, a prepayment upon
acceleration), Borrower shall pay to Lender all accrued interest to the date of
such prepayment on the amount prepaid.

              (b)    OPTIONAL PREPAYMENTS.  At its option, Borrower may, upon
three (3) Business Days' notice to Lender, prepay the Loans in whole, or in part
in the amount of Ten Thousand Dollars ($10,000) or any integral multiple
thereof.

                                    -4-

<PAGE>

              (c)    APPLICATION OF PREPAYMENTS.  All prepayments hereunder
shall be applied first to unpaid fees, costs and expenses then due and payable
under this Loan Agreement or the other Loan Documents, second to accrued
interest then due and payable under this Loan Agreement or the other Loan
Documents and finally to reduce the principal amount of outstanding Loans. 

       2.6    OTHER PAYMENT TERMS.

              (a)    PLACE AND MANNER.  Other than pursuant to Section
2.3(b)(i), Borrower shall make all payments due to Lender hereunder to a bank
account designated by Lender or, at Lender's option, at the address specified in
Section 9.1, in each case in lawful money of the United States and in same day
or immediately available funds.

              (b)    DATE.  Whenever any payment due hereunder shall fall due on
a day other than a Business Day, such payment shall be made on the next
succeeding Business Day, and such extension of time shall be included in the
computation of interest or fees, as the case may be.

              (c)    DEFAULT RATE.  From and after the occurrence of an Event of
Default and during the continuance thereof, Borrower shall pay interest on the
aggregate, outstanding balance of the Loans, and on interest (compounded
monthly) and other amounts not paid when due hereunder or under the other Loan
Documents, from the date due thereof until those amounts are paid in full at a
per annum rate equal to the Prime Rate PLUS three percent (3%), such rate to
change from time to time as the Prime Rate shall change.  All computations of
such interest shall be based on a year of 360 days for actual days elapsed.

       2.7    NOTE.  The obligation of Borrower to repay the Loans and to pay
interest thereon at the rates provided herein shall be evidenced by a promissory
note in the form of Exhibit A (the "NOTE").

       2.8    LOAN FUNDING.  Lender shall disburse the proceeds of the Loans
into a bank account of Borrower in which Lender has a first priority perfected
security interest.

       2.9    SECURITY; FURTHER ASSURANCES.

              (a)    SECURITY.  The Obligations shall be secured by the
       following:

                           (i)     A Security Agreement in the form of Exhibit B
              hereto (the "SECURITY AGREEMENT");

                           (ii)    A Stock Pledge Agreement in the form of
              Exhibit C hereto (the "PLEDGE AGREEMENT"), executed by each holder
              of Equity Securities of Borrower; and

                           (iii)   An Intellectual Property Security Agreement
              in the form of Exhibit D hereto (the "INTELLECTUAL PROPERTY
              SECURITY AGREEMENT").

              (b)    FURTHER ASSURANCES.  Borrower shall deliver, or shall cause
to be delivered, to Lender the Security Agreement, the Pledge Agreement and the
Intellectual Property Security Agreement and such other instruments, agreements,
certificates, opinions and documents as Lender may reasonably request to create,
perfect, evidence and maintain (i) a first priority security interest of Lender
in all of the assets of Borrower and the Equity Securities of Borrower as
further set forth in the Security Agreement, the Pledge Agreement and the

                                    -5-

<PAGE>

Intellectual Property Security Agreement and (ii) the rights of Lender under
this Loan Agreement and the other Loan Documents.  Borrower shall fully
cooperate with Lender and perform all additional acts reasonably requested by
Lender to effect the purposes of the foregoing and the rights granted to Lender
hereunder.


ARTICLE 3.    REPRESENTATIONS AND WARRANTIES OF BORROWER.

       To induce Lender to enter into this Loan Agreement and to make Loans 
hereunder, Borrower represents and warrants to Lender that, except as set 
forth in the Disclosure Schedule (which Disclosure Schedule shall set forth 
exceptions to each Section of this Article 3 in a separate item and no 
exception to one Section shall be deemed to relate to another Section unless 
a specific cross-reference is made in the Disclosure Schedule item 
corresponding to such other Section):

       3.1    DUE INCORPORATION, QUALIFICATION, ETC.  Borrower (i) is a
corporation duly organized, validly existing and in good standing under the laws
of its state of incorporation; (ii) has the power and authority to own, lease
and operate its properties and carry on its business as now conducted; and (iii)
is duly qualified, licensed to do business and in good standing as a foreign
corporation in each jurisdiction where the failure to be so qualified or
licensed could reasonably be expected to have a Material Adverse Effect.

       3.2    AUTHORITY.  The execution, delivery and performance by Borrower of
each Loan Document to be executed by Borrower and the consummation of the
transactions contemplated thereby (i) are within the power of Borrower and (ii)
have been duly authorized by all necessary actions on the part of Borrower.

       3.3    ENFORCEABILITY.  Each Loan Document executed, or to be executed,
by Borrower has been, or will be, duly executed and delivered by Borrower and
constitutes, or will constitute, a legal, valid and binding obligation of
Borrower, enforceable against Borrower in accordance with its terms, except as
limited by bankruptcy, insolvency or other laws of general application relating
to or affecting the enforcement of creditors' rights generally and general
principles of equity.

       3.4    NON-CONTRAVENTION.  The execution and delivery by Borrower of the
Loan Documents executed by Borrower and the performance and consummation of the
transactions contemplated thereby do not and will not (i) violate any
Requirement of Law applicable to Borrower; (ii) violate any provision of, or
result in the breach or the acceleration of, or entitle any other Person to
accelerate (whether after the giving of notice or lapse of time or both), any
Contractual Obligation of Borrower; or (iii) result in the creation or
imposition of any Lien upon any property, asset or revenue of Borrower (except
such Liens as may be created in favor of Lender pursuant to this Loan Agreement
or the other Loan Documents).

       3.5    APPROVALS.  No consent, approval, order or authorization of, or
registration, declaration or filing with, any Governmental Authority or other
Person (including, without limitation, the shareholders of any Person) is
required in connection with the execution and delivery of the Loan Documents
executed by Borrower and the performance and consummation of the transactions
contemplated thereby.

       3.6    NO VIOLATION OR DEFAULT.  Borrower is not in violation of or in
default with respect to (i) any Requirement of Law; (ii) any Contractual
Obligation (nor is there any waiver in effect which, if not in effect, would
result in such a violation or default), where, in each case, such violation or
default, individually, or together with all such violations or defaults, could
reasonably be expected to have a Material Adverse Effect.  Without limiting the
generality of the foregoing, Borrower (A) has not violated any Environmental
Laws, 

                                    -6-

<PAGE>

(B) does not have any liability under any Environmental Laws, or (C) has
not received notice or other communication of an investigation nor is under
investigation by any Governmental Authority having authority to enforce
Environmental Laws, where such violation, liability or investigation could
reasonably be expected to have a Material Adverse Effect.  No Event of Default
or Default has occurred and is continuing.

       3.7    LITIGATION.  Except as set forth (with estimates of the dollar
amounts involved) in Item 3.7 of the Disclosure Schedule, no actions (including,
without limitation, derivative actions), suits, proceedings or investigations
are pending or, to the knowledge of Borrower, threatened against Borrower at law
or in equity in any court or before any other Governmental Authority which if
adversely determined (i) would (alone or in the aggregate) have a Material
Adverse Effect or (ii) seeks to enjoin, either directly or indirectly, the
execution, delivery or performance by Borrower of the Loan Documents or the
transactions contemplated thereby.

       3.8    TITLE.  Borrower owns and has good and marketable title in fee
simple absolute to, or a valid leasehold interest in, all its real properties
and good title to its other assets and properties as reflected in the most
recent Financial Statements delivered to Lender (except those assets and
properties disposed of in the ordinary course of business since the date of such
Financial Statements) and all assets and properties acquired by Borrower since
such date (except those disposed of in the ordinary course of business).  Such
assets and properties are subject to no Lien, except for Permitted Liens.

       3.9    FINANCIAL STATEMENTS.  The Financial Statements of Borrower which
have been delivered to Lender, (i) are in accordance with the books and records
of Borrower, which have been maintained in accordance with good business
practice; (ii) have been prepared in conformity with GAAP; and (iii) fairly
present the consolidated financial position of Borrower as of the dates
presented therein and the results of operations, and changes in financial
positions or cash flows, as the case may be, for the periods presented therein. 
Borrower does not have any contingent obligations, liability for taxes or other
outstanding obligations which are material in the aggregate, except as disclosed
in the Financial Statements dated December 31, 1996, furnished by Borrower to
Lender prior to the date hereof.

       3.10   EQUITY SECURITIES.  Borrower's total authorized and issued
capitalization (including the appropriate conversion ratios) is as set forth in
Item 3.10 of the Disclosure Schedule.  The Equity Securities of Borrower have
the respective rights, preferences and privileges set forth in Borrower's
Charter Documents in effect on the date hereof.  All of the outstanding Equity
Securities of the Borrower have been duly authorized and are validly issued,
fully paid and nonassessable. Except as expressly referenced herein or as set
forth in Item 3.10 of the Disclosure Schedule, there are as of the date of this
Loan Agreement no options, warrants or rights to purchase Equity Securities
authorized, issued or outstanding, nor is Borrower obligated in any other manner
to issue shares of its Equity Securities.  There are no restrictions on the
transfer of shares of capital stock of Borrower, other than those imposed by
Borrower's Charter Documents as of the date hereof, or relevant state and
federal securities laws, and no holder of any Equity Security of Borrower is
entitled to preemptive or similar statutory or contractual rights, either
arising pursuant to any agreement or instrument to which Borrower is a party or
that are otherwise binding upon Borrower.  The offer and sale of all shares of
Equity Securities of Borrower issued before the Closing Date complied with or
were exempt from registration or qualification under all applicable federal and
state securities laws.  No Person has the right to demand or other rights to
cause Borrower to file any registration statement under the Securities Act,
relating to any Equity Securities of Borrower presently outstanding or that may
be subsequently issued, or any right to participate in any such registration
statement.

                                    -7-

<PAGE>

       3.11   NO AGREEMENTS TO SELL ASSETS.  Borrower does not have any legal
obligation, absolute or contingent, to any Person to sell any of the assets of
Borrower (other than sales in the ordinary course of business), or to effect any
merger, consolidation or other reorganization of Borrower or to enter into any
agreement with respect thereto.

       3.12   EMPLOYEE BENEFIT PLANS.

              (a)    Borrower and its ERISA Affiliates have no Employee Benefit
Plan that is an "employee pension benefit plan" (within the meaning of section
3(2) of ERISA).  Neither Borrower nor any ERISA Affiliate has any liability with
respect to any post-retirement benefit under any Employee Benefit Plan which is
a welfare plan (as defined in section 3(1) of ERISA), other than liability for
health plan continuation coverage described in Part 6 of Title I(B) of ERISA,
which liability for health plan contribution coverage cannot reasonably be
expected to have a Material Adverse Effect.

              (b)    Each Employee Benefit Plan complies, in both form and
operation, in all material respects, with its terms, ERISA and the Code, and no
condition exists or event has occurred with respect to any such plan which would
result in the incurrence by either Borrower or any ERISA Affiliate of any
material liability, fine or penalty.  Each Employee Benefit Plan, related trust
agreement, arrangement and commitment of Borrower or any ERISA Affiliate is
legally valid and binding and in full force and effect.  No Employee Benefit
Plan is being audited or investigated by any government agency or is subject to
any pending or threatened claim or suit.  Neither Borrower nor any ERISA
Affiliate nor any fiduciary of any Employee Benefit Plan has engaged in a
prohibited transaction under section 406 of ERISA or section 4975 of the Code.

              (c)    Neither Borrower nor any ERISA Affiliate contributes to any
Multiemployer Plan.  Neither Borrower nor any ERISA Affiliate has incurred any
material liability (including secondary liability) to any Multiemployer Plan as
a result of a complete or partial withdrawal from such Multiemployer Plan under
section 4201 of ERISA or as a result of a sale of assets described in section
4204 of ERISA.  Neither Borrower nor any ERISA Affiliate has been notified that
any Multiemployer Plan is in reorganization or insolvent under and within the
meaning of section 4241 or section 4245 of ERISA or that any Multiemployer Plan
intends to terminate or has been terminated under section 4041A of ERISA.

       3.13   OTHER REGULATIONS.   Borrower is not subject to regulation under
the Investment Company Act of 1940, the Public Utility Holding Company Act of
1935, the Federal Power Act, the Interstate Commerce Act, any state public
utilities code or to any federal or state statute or regulation limiting its
ability to incur Indebtedness.

       3.14   GOVERNMENTAL CHARGES AND OTHER INDEBTEDNESS.  Borrower has filed
or caused to be filed all tax returns which are required to be filed by it. 
Borrower has paid, or made provision for the payment of, all taxes and other
Governmental Charges which have or may have become due pursuant to said returns
or otherwise and all other Indebtedness, except such Governmental Charges or
Indebtedness, if any, which are being contested in good faith and as to which
adequate reserves (determined in accordance with GAAP) have been provided or
which could not reasonably be expected to have a Material Adverse Effect if
unpaid.

       3.15   SUBSIDIARIES, ETC.   Borrower has no Subsidiaries and is not a
partner in any partnership or a joint venturer in any joint venture.

                                    -8-

<PAGE>

       3.16   CATASTROPHIC EVENTS; LABOR DISPUTES.  Neither Borrower nor any of
its properties is or has been affected by any fire, explosion, accident, strike,
lockout or other labor dispute, drought, storm, hail, earthquake, embargo, act
of God or other casualty that could reasonably be expected to have a Material
Adverse Effect.  There are no disputes presently subject to grievance procedure,
arbitration or litigation under any of the collective bargaining agreements,
employment contracts or employee welfare or incentive plans to which Borrower is
a party, and there are no strikes, lockouts, work stoppages or slowdowns, or, to
the best knowledge of Borrower, jurisdictional disputes or organizing activity
occurring or threatened which could reasonably be expected to have a Material
Adverse Effect.

       3.17   NO MATERIAL ADVERSE EFFECT.  No event has occurred and, to the
knowledge of Borrower, no condition exists which could reasonably be expected to
have a Material Adverse Effect.

       3.18   ACCURACY OF INFORMATION FURNISHED.  None of the Loan Documents and
none of the other certificates, statements or information furnished to Lender by
or on behalf of Borrower in connection with the Loan Documents or the
transactions contemplated thereby contains or will contain any untrue statement
of a material fact or omits or will omit to state a material fact necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading.

       3.19   CERTAIN AGREEMENTS OF OFFICERS, EMPLOYEES AND CONSULTANTS.

              (a)    No officer, employee or consultant of Borrower is, or is
now expected to be, in violation of any term of any employment contract,
proprietary information agreement, nondisclosure agreement, noncompetition
agreement, or any other contract or agreement or any restrictive covenant
relating to the right of any such officer, employee or consultant to be employed
by Borrower because of the nature of the business conducted or to be conducted
by Borrower or relating to the use of trade secrets or proprietary information
of others, and to the best of Borrower's knowledge, after due inquiry, the
continued employment of Borrower's officers, employees and consultants do not
subject Borrower to any liability for any claim or claims, which if adversely
decided could reasonably be expected to have a Material Adverse Effect, arising
out of or in connection with any such contract, agreement, or covenant.

              (b)    To the knowledge of Borrower, after due inquiry, no
officers of Borrower, and no employee or consultant of Borrower whose
termination or discontinuation of full-time employment, either individually or
in the aggregate, could reasonably be expected to have a Material Adverse
Effect, has any present intention of terminating or otherwise materially
altering his or her employment or consulting relationship with Borrower.

              (c)    All officers, employees and consultants of Borrower have
executed an agreement relating to the use of trade secrets or proprietary
information of Borrower, and Borrower has provided to Lender a copy of such
agreements.

       3.20   CONTRACTS OR COMMITMENTS; INDEBTEDNESS.  

              (a)    Neither Borrower nor any of its properties is subject to
any Contractual Obligation or Requirement of Law which could reasonably be
expected to have a Material Adverse Effect.  Except for this Loan Agreement, the
Note and the other Loan Documents, Borrower is not a party to any contracts or
commitments (or group of related contracts or commitments) involving more than
Fifty Thousand Dollars ($50,000) or having a term (including renewals or
extensions optional with another party) of more than one (1) 

                                    -9-

<PAGE>

year from the date thereof.  Except as set forth in Item 3.20 of the 
Disclosure Schedule, Borrower has no Indebtedness other than Permitted 
Indebtedness.

       3.21   GM AGREEMENT.  The GM Agreement is valid, binding and in full
force and effect and is enforceable by Borrower in accordance with its terms and
will continue in full force and effect after the Closing.  Borrower has
performed all its obligations required to be performed by it to date under the
GM Agreement, and Borrower is not in breach or default in any material respect
thereunder and, to the knowledge of Borrower, GM is not in breach or default in
any material respect thereunder.  There exists no actual or threatened
termination, cancellation or limitation of, or any modification or change in,
the business relationship of Borrower with GM, and there exists no present or
future condition or state of facts or circumstances involving GM that Borrower
can now reasonably foresee which would have a Material Adverse Effect on
Borrower's business or prevent the conduct of Borrower's business after the
consummation of the transactions contemplated by this Loan Agreement and the
Loan Documents in essentially the same manner in which such business has
heretofore been conducted.  Nothing contained in this Section 3.21 shall in any
way limit the representations and warranties of Borrower with respect to the GM
Agreement contained elsewhere in this Loan Agreement and the Loan Documents.  

       3.22   TRANSACTIONS WITH AFFILIATES.  There are no loans, leases, royalty
agreements or other continuing transactions between Borrower and any Affiliate
of Borrower, except as set forth on the Disclosure Schedule, all of which are
transactions in the ordinary course of business and on terms at least as
favorable to Borrower as would be the case in an arms-length transaction with an
unaffiliated Person.

       3.23   DEPOSIT ACCOUNTS AND INVESTMENT ACCOUNTS.  Except as set forth in
Item 3.23 of the Disclosure Schedule, Borrower has no deposit accounts with
banks or investment or similar accounts with brokerage firms.


ARTICLE 4.    CONDITIONS TO CLOSING.

       Lender's obligation to make the initial Loan is subject to the prior
satisfaction or waiver of all the conditions set forth in Sections 4.1 through
4.13 of this Article 4.  Lender's obligation to make each subsequent Loan is
subject to the prior satisfaction or waiver of all the conditions set forth in
Section 4.14 of this Article 4.

       4.1    PRINCIPAL LOAN DOCUMENTS.  Borrower shall have, or shall have
caused to have been, duly executed and delivered to Lender the following
documents, each in form and substance satisfactory to Lender:

              (a)    The Loan Agreement;

              (b)    The Note;

              (c)    The Security Agreement;

              (d)    The Intellectual Property Security Agreement;

              (e)    A Pledge Agreement, duly executed by each holder of
Borrower's Equity Securities, together with original stock certificates
representing 100% of Borrower's Equity Securities, and stock powers executed in
blank;

                                    -10-

<PAGE>

              (f)    The Purchase Options, duly executed by each holder of
Equity Securities of Borrower, in the form of Exhibit E hereto;

              (g)    The Distribution Agreement between Lender and Borrower in
the form attached hereto as Exhibit F (the "DISTRIBUTION AGREEMENT");

              (h)    A Notice of Borrowing (at least five (5) Business Days
prior to the Closing Date); and

              (i)    Such Uniform Commercial Code financing statements and other
documents, instruments and agreements as Lender may reasonably request to
perfect the security interests granted to Lender in the Security Agreement, the
Pledge Agreement and the Intellectual Property Security Agreement.

       4.2    EMPLOYMENT AGREEMENTS.  Borrower shall have entered into
employment agreements with each of its executive officers and key employees in
the form attached hereto as Exhibit G (collectively, the "EMPLOYMENT
AGREEMENTS").

       4.3    AMENDMENT OF BORROWER STOCK OPTION PLAN. Borrower shall have 
amended the Dasys Inc. Stock Purchase and Stock Option Plan of 1992 (the 
"Stock Option Plan"), in form and substance satisfactory to Lender, to 
provide, among other things, (i) for an authorized option pool not to exceed 
ten percent (10%) of the outstanding Equity Securities of Borrower at any 
given time, on an as-converted/exercised basis, and (ii) that each such 
option will obligate the optionholder to be bound by the terms of the Pledge 
Agreement and the Purchase Options. 

       4.4    AMENDMENT OF GM AGREEMENT.  Borrower shall have entered into an
amendment to the GM Agreement in form and substance reasonably satisfactory to
Lender.

       4.5    REPRESENTATIONS AND WARRANTIES CORRECT.  The representations and
warranties made by Borrower in Article 3 hereof, and by each holder of
Borrower's Equity Securities in the Purchase Options and the Stock Pledge
Agreements, shall be true and correct as of the Closing Date and after giving
effect to the making of the initial Loan.

       4.6    COMPLIANCE CERTIFICATE.  Borrower shall have delivered to Lender
on the Closing Date a certificate of Borrower certifying the accuracy of all
representations and warranties set forth in Article 3 and certifying that all
conditions to closing have been completed, executed by the Chief Executive
Officer of Borrower and dated as of such Closing Date.

       4.7    AMENDMENT TO ARTICLES OF INCORPORATION.  Borrower shall have
amended its Articles of Incorporation to modify its total number of authorized
shares to 3,155,656 and to prohibit the issuance of any additional Equity
Securities without the prior written consent of Lender.

       4.8    CORPORATE DOCUMENTS.  Borrower shall have delivered to Lender each
of the following:

              (a)    The Articles of Incorporation of Borrower, as amended in
accordance with Section 4.7, certified as of a recent date prior to the Closing
Date by the Secretary of State of Pennsylvania;

              (b)    A Certificate of Good Standing or comparable certificate
for Borrower, certified as of a recent date prior to the Closing Date by the
Secretary of State of Pennsylvania.

                                    -11-

<PAGE>

              (c)    A certificate of the Secretary of Borrower, dated the
Closing Date, certifying (a) that the Articles of Incorporation of Borrower,
delivered to Lender pursuant to Section 4.8(a) hereof, is in full force and
effect and has not been amended, supplemented, revoked or repealed since the
date of such certification; (b) that attached thereto is a true and correct copy
of the Bylaws of Borrower as in effect on the Closing Date; (c) that attached
thereto are true and correct copies of resolutions duly adopted by the Board of
Directors of Borrower and continuing in effect, which authorize the execution,
delivery and performance by Borrower of this Loan Agreement and the other Loan
Documents executed or to be executed by Borrower and the consummation of the
transactions contemplated hereby and thereby; and (d) that there are no
proceedings for the dissolution or liquidation of Borrower (commenced or
threatened); and

              (d)    A certificate of the Secretary of Borrower, dated the
Closing Date, certifying the incumbency, signatures and authority of the
officers of Borrower authorized to execute, deliver and perform this Loan
Agreement and the other applicable Loan Documents on behalf of Borrower.

       4.9    CONSENTS; PERMITS; WAIVERS.  Borrower shall have obtained all
consents, permits and waivers necessary or appropriate for consummation of the
transactions contemplated by this Loan Agreement which need to be obtained prior
to the Closing Date, including without limitation the consent of Design
Solutions, Inc. pursuant to the DSI Distribution Agreement and evidence of
qualification of this Loan Agreement and the Note under applicable blue sky laws
for the State of Pennsylvania and Oregon.  

       4.10   LEGAL MATTERS.  All material matters of a legal nature which
pertain to this Loan Agreement and the other Loan Documents and the transactions
contemplated hereby and thereby shall be reasonably satisfactory to Lender and
its counsel.

       4.11   OPINION OF COUNSEL.  There shall have been delivered to Lender a
favorable written opinion of  Buchanan & Ingersoll, counsel to Borrower, in form
and substance reasonably acceptable to Lender, dated as of the Closing Date.

       4.12   FINANCIAL STATEMENTS.  Borrower shall have delivered to Lender
copies of Borrower's most recent Financial Statements, which shall include
information no less recent than May 31, 1997.

       4.13   INSURANCE.  Borrower shall have delivered to Lender an insurance
certificate showing Borrower's insurance coverage complying with the provisions
of Section 5.1(d) and naming Lender as loss payee with respect to casualty
policies and as an additional insured with respect to liability policies.

       4.14   CONDITIONS TO LENDER'S OBLIGATION TO MAKE EACH LOAN.  The making
of each Loan is subject to the further condition that on the date such Loan is
made and after giving effect thereto, the following shall be true and correct:

              (a)    The representations and warranties set forth in Article 3
       are true and correct in all material respects as if made on such date;

              (b)    No Default or Event of Default has occurred and is
       continuing or will result from the making of the Loan; 

              (c)    Each of the Loan Documents remains in full force and
       effect; and

                                    -12-

<PAGE>

              (d)    The Notice of Borrowing shall have been approved by the
Budget Committee in accordance with the provisions of Section 2.1(b).

The submission by Borrower to Lender of an approved Notice of Borrowing with
respect to the Loan shall be deemed to be a representation and warranty by
Borrower as of the date thereof as to the above. 

       4.15   AGREEMENT TO DELIVER.  Borrower agrees (not as a condition but as
a covenant) to deliver to Lender each item required to be delivered to Lender as
a condition to closing under this Article 4.  Borrower expressly agrees that the
occurrence of the Closing Date prior to the receipt by Lender of any such item
shall not constitute a waiver by Lender of Borrower's obligation to deliver such
item.

ARTICLE 5.    COVENANTS OF BORROWER.

       5.1    AFFIRMATIVE COVENANTS.  Until the termination of the commitment to
make Loans under this Loan Agreement and the satisfaction in full by Borrower of
all Obligations, Borrower shall comply, and shall cause compliance, with the
following affirmative covenants unless Lender shall otherwise consent in
writing:

              (a)    FINANCIAL STATEMENTS, REPORTS, ETC.  Borrower shall furnish
to Lender the following, each in such form and such detail as Lender shall
reasonably request:

                           (i)     Within forty-five (45) days after the last
              day of each fiscal quarter of Borrower, a copy of the Financial
              Statements of Borrower for such quarter and for the fiscal year to
              date, certified by the chief financial officer or controller of
              Borrower to present fairly the financial condition, results of
              operations and other information presented therein and to have
              been prepared in accordance with GAAP consistently applied,
              subject to normal year end adjustments and except that no
              footnotes need be included with such Financial Statements;

                           (ii)    Within ninety (90) days after the close of
              each fiscal year of Borrower, (A) copies of the audited Financial
              Statements of Borrower for such year, audited by independent
              certified public accountants reasonably acceptable to Lender, (B)
              copies of the unqualified opinions and management letters
              delivered by such accountants in connection with such Financial
              Statements and (C) certificates of such accountants to Lender
              stating that in making the examination necessary for their opinion
              they have obtained no knowledge of any Event of Default or
              Default, or if, in the opinion of such accountants, an Event of
              Default or Default has occurred, a statement as to the nature
              thereof (or other certificates of such accountants reasonably
              acceptable to Lender);

                           (iii)   Contemporaneously with the quarterly and
              year-end financial statements required by the foregoing CLAUSES
              (ii) AND (iii), a certificate of the president or chief financial
              officer of Borrower stating that no Event of Default and no
              Default has occurred, or, if any such Event of Default or Default
              has occurred, a statement as to the nature thereof and what action
              Borrower proposes to take with respect thereto;

                                    -13-

<PAGE>

                           (iv)    As soon as possible and in no event later
              than five (5) Business Days after the occurrence or existence of:
              (A) any Reportable Event under any Employee Benefit Plan or
              Multiemployer Plan; (B) any actual or threatened litigation,
              suits, claims or disputes against Borrower involving potential
              monetary damages payable by Borrower of One Hundred Thousand
              Dollars ($100,000) or more (alone or in the aggregate); (C) any
              other event or condition which could reasonably be expected to
              have a Material Adverse Effect; or (D) any Event of Default or
              Default; the statement of the president or chief financial officer
              of Borrower setting forth details of such event, condition, Event
              of Default or Default and the action which Borrower proposes to
              take with respect thereto; 

                           (v)     As soon as possible and in no event later
              than five (5) Business Days after they are filed, copies of all
              IRS Form 5500 reports for all Employee Benefit Plans required to
              file such form;

                           (vi)    Promptly after the commencement thereof,
              notice of any and all agreements with any entity, or events,
              actions, suits and proceedings of the type described in Section
              3.7 before any court or governmental department, commission,
              board, bureau, agency or instrumentality, domestic or foreign;

                           (vii)   Within sixty (60) days of the commencement of
              each fiscal year of Borrower, a copy of the draft operating plan
              and budget of Borrower for such fiscal year, which operating plan
              and budget shall be finalized within thirty (30) days of the
              commencement of such fiscal year, in form, substance and detail
              satisfactory to Lender.  Upon the Budget Committee's review and
              approval, in its sole discretion, of such operating plan and
              budget, the same shall become the Budget with respect to which
              Loans may be requested by Borrower in accordance with Section
              2.1(b);

                           (viii)  Notice of the filing for or issuance of a
              registered patent or copyright or of the filing for or issuance of
              a registered trademark with respect to Borrower as soon as
              Borrower makes such filing or receives such notice and, in any
              event, within ten (10) business days of Borrower's receipt of such
              notice; and

                           (ix)    Such other instruments, agreements,
              certificates, opinions, statements, documents and information
              relating to the operations or condition (financial or otherwise)
              of Borrower and compliance by Borrower with the terms of this Loan
              Agreement and the other Loan Documents as Lender may from time to
              time reasonably request.

              (b)    BOOKS AND RECORDS.  Borrower shall at all times keep proper
books of record and account in which full, true and correct entries will be made
of their transactions in accordance with GAAP.

              (c)    INSPECTIONS.  Borrower shall permit any Person designated
by Lender, upon reasonable notice and during normal business hours, to visit and
inspect any of the properties and offices of Borrower, to examine the books of
account of Borrower and to discuss the affairs, finances and accounts of
Borrower with, and to be advised as to the same by, their officers, auditors,
consultants, advisors and accountants, all at such times and intervals as Lender
may reasonably request.  Notwithstanding the foregoing, Lender may conduct such
inspections no more frequently than once per fiscal quarter.

                                    -14-

<PAGE>

              (d)    INSURANCE.  Borrower shall (i) carry and maintain insurance
at its expense of the types and in the amounts customarily carried from time to
time during the term of this Loan Agreement by others engaged in substantially
the same business as such Person and operating in the same geographic area as
such Person, including, but not limited to, fire, public liability, property
damage and worker's compensation, such insurance to be in such form as is
carried with companies and in amounts satisfactory to Lender, and (ii) deliver
to Lender from time to time, as Lender may request, schedules or insurance
certificates setting forth all insurance then in effect.  All such policies of
property insurance shall name Lender as loss payee thereunder and all liability
insurance policies shall show Lender as an additional insured, and shall specify
that the insurer must give at least twenty (20) days notice to Lender (or ten
(10) days in the case of cancellation for non-payment of premiums) before
canceling its policy for any reason.  All proceeds under the property insurance
shall, at the option of Borrower, be payable to Lender to be applied to the
Obligations.

              (e)    GOVERNMENTAL CHARGES AND OTHER INDEBTEDNESS.  Borrower
shall promptly pay and discharge when due (i) all taxes and other Governmental
Charges prior to the date upon which penalties accrue thereon, (ii) all
Indebtedness which, if unpaid, could become a Lien upon the property of Borrower
and (iii) all other Indebtedness which, if unpaid, could reasonably be expected
to have a Material Adverse Effect, except such Indebtedness as may in good faith
be contested or disputed, or for which arrangements for deferred payment have
been made, provided that in each such case appropriate reserves are maintained
in accordance with GAAP and otherwise to the reasonable satisfaction of Lender.

              (f)    USE OF PROCEEDS.  Borrower shall use the proceeds of the
Loans only for the respective purposes set forth in Section 2.4.

              (g)    GENERAL BUSINESS OPERATIONS.  Borrower shall (i) preserve
and maintain its corporate existence and all of its rights, privileges and
franchises reasonably necessary to the conduct of its business, (ii) conduct its
business activities in compliance with all Requirements of Law and Contractual
Obligations applicable to such Person, (iii) keep all property useful and
necessary in its business in good working order and condition, ordinary wear and
tear excepted, and (iv) maintain its chief executive office and principal place
of business in Pittsburgh, Pennsylvania unless it shall have given Lender thirty
(30) days' prior written notice of its intent to change the location thereof.

              (h)    REGISTRATION OF COPYRIGHTS; SOURCE CODE ESCROW.  Borrower
shall cause to be registered with the United States Copyright Office within
ninety (90) days of the Closing Date the source code and user manuals for all
software which is significant to the business of Borrower or software the
licensing revenues from which constitute or can reasonably be expected to
constitute in excess of five percent (5%) of the consolidated revenue of
Borrower (collectively and including source code and user manuals, "MATERIAL
SOFTWARE").  On an ongoing basis Borrower will register Material Software and
major revisions of Material Software with the United States Copyright Office. 
On or prior to the Closing Date, Borrower shall have delivered to Escrow Agent
pursuant to that certain Escrow Agreement in the form attached hereto as Exhibit
H (the "ESCROW AGREEMENT") a true and correct copy of the source code for the
Material Software.  Not less often than quarterly after the Closing Date,
Borrower will deliver copies of the source code for the latest versions of the
Material Software and any new Material Software. 

       5.2    NEGATIVE COVENANTS.  Until the termination of the commitment to
make Loans under this Loan Agreement and the satisfaction in full by Borrower of
all Obligations, and except as otherwise provided in Section 9.3 hereof,
Borrower shall comply, and shall cause compliance, with the following negative
covenants unless Lender shall otherwise consent in writing:

                                    -15-

<PAGE>

              (a)    INDEBTEDNESS.  Borrower shall not create, incur, assume or
permit to exist any Indebtedness except for Permitted Indebtedness.

              (b)    LIENS.  Borrower shall not create, incur, assume or permit
to exist any Lien on or with respect to any of its assets or property of any
character, whether now owned or hereafter acquired, except for Permitted Liens.

              (c)    ASSET DISPOSITIONS.  Borrower shall not sell, lease,
transfer, license or otherwise dispose of (collectively, a "TRANSFER") any of
its assets or property, whether now owned or hereafter acquired, except
Transfers in the ordinary course of its business consisting of (i) the sale of
software products pursuant to non-exclusive licenses, (ii) sales of fully
depreciated, worn-out or obsolete equipment, and (iii) other sales of tangible
assets not material to the business of Borrower in an amount not to exceed
Twenty Five Thousand Dollars ($25,000) in any fiscal year.

              (d)    MERGERS, ACQUISITIONS, ETC.  Borrower shall not consolidate
with or merge into any other Person or permit any other Person to merge into it,
or acquire all or substantially all of the assets or capital stock of any other
Person.

              (e)    INVESTMENTS; SUBSIDIARIES.  Borrower shall not make any
Investment except for Permitted Investments.  Borrower shall not create, acquire
or permit to exist any Subsidiary.

              (f)    DIVIDENDS, REDEMPTIONS, ETC.  Borrower shall not (i) pay
any dividends or make any distributions on its Equity Securities; (ii) purchase,
redeem, retire, defease or otherwise acquire for value any of its Equity
Securities (other than repurchases by cancellation of indebtedness pursuant to
the terms of employee stock purchase plans, employee restricted stock agreements
or similar arrangements); (iii) return any capital to any holder of its Equity
Securities as such; (iv) make any distribution of assets, Equity Securities,
obligations or securities to any holder of its Equity Securities as such; (v)
set apart any sum for any such purpose; or (vi) unless unanimously approved by
the Board of Directors of Borrower, pay any bonus or bonuses to officers,
directors, employees or consultants of Borrower in an aggregate amount greater
than One Hundred Thousand Dollars ($100,000) in any twelve (12) month period.

              (g)    ARTICLES OF INCORPORATION.  Borrower shall not amend or
otherwise modify its Articles of Incorporation, as amended, except in accordance
with Section 4.7 hereof.

              (h)    CAPITAL EXPENDITURES.  Borrower shall not pay or incur
Capital Expenditures which exceed in aggregate in any fiscal year One Hundred
Thousand Dollars ($100,000) unless the Board of Directors of Borrower shall have
unanimously approved a higher amount.

              (i)    CHANGE IN BUSINESS.  Borrower shall not engage, either
directly or indirectly through Affiliates, in any business substantially
different from its present business.

              (j)    INDEBTEDNESS PAYMENTS.  Borrower shall not (i) prepay,
redeem, purchase, defease or otherwise satisfy in any manner prior to the
scheduled repayment thereof any Indebtedness for borrowed money (other than the
Obligations) or lease obligations, (ii) amend, modify or otherwise change the
terms of any Indebtedness for borrowed money (other than the Obligations) or
lease obligations so as to accelerate the scheduled repayment thereof or (iii)
repay any notes to officers, directors or shareholders (other than the
Obligations).

                                    -16-

<PAGE>

              (k)    SECURITY ISSUANCES.  Borrower shall not issue, offer or 
sell any Equity Securities of Borrower; provided, however that Borrower may 
issue options to employees of Borrower hired after the date of this Loan 
Agreement.  Such options shall not in the aggregate exceed ten percent (10%) 
of the outstanding Equity Securities of Borrower at any given time, on an 
as-converted/exercised basis, and each such option will obligate the 
optionholder to be bound by the terms of the Pledge Agreement and the 
Purchase Options.

              (l)    ERISA.  Neither Borrower nor any ERISA Affiliate shall (i)
adopt or institute any Employee Benefit Plan that is an employee pension benefit
plan within the meaning of section 3(2) of ERISA, (ii) take any action which
will result in the partial or complete withdrawal, within the meanings of
sections 4203 and 4205 of ERISA, from a Multiemployer Plan, (iii) engage or
permit any Person to engage in any transaction prohibited by section 406 of
ERISA or section 4975 of the Code involving any Employee Benefit Plan or
Multiemployer Plan which would subject either Borrower or any ERISA Affiliate to
any tax, penalty or other liability including a liability to indemnify, (iv)
incur or allow to exist any accumulated funding deficiency (within the meaning
of section 412 of the Code or section 302 of ERISA), (v) fail to make full
payment when due of all amounts due as contributions to any Employee Benefit
Plan or Multiemployer Plan, (vi) fail to comply with the requirements of section
4980B of the Code or Part 6 of Title I(B) of ERISA, or (vii) adopt any amendment
to any Employee Benefit Plan which would require the posting of security
pursuant to section 401(a)(29) of the Code, where singly or cumulatively, the
above would have a Material Adverse Effect.

              (m)    TRANSACTIONS WITH AFFILIATES.  Borrower shall not enter
into any Contractual Obligation with any Affiliate or engage in any other
transaction with any Affiliate except upon terms at least as favorable to
Borrower as an arms-length transaction with unaffiliated Persons and unless the
Board of Directors of Borrower shall have unanimously approved such transaction.

              (n)    TERMINATION OF EMPLOYEES.  Borrower shall not terminate the
employment of any of the individuals covered by the Employment Agreements or any
other key employee hired by Borrower after the date hereof.

              (o)    ACCOUNTING CHANGES.  Borrower shall not change (i) its
fiscal year (currently December 31) or (ii) its accounting practices except as
required by GAAP, in which case Borrower shall promptly advise Lender of such
change.


ARTICLE 6.    ADDITIONAL LENDER RIGHTS.

       6.1    NOTICE OF EVENTS NOT IN ORDINARY COURSE.  Borrower shall provide
Lender with written notice at least thirty (30) days prior to the proposed date
of closing of any transaction not in the ordinary course of business involving
an aggregate amount in excess of Fifty Thousand Dollars ($50,000). 

       6.2    BOARD OF DIRECTORS.  Borrower shall have its authorized number of
directors set at five (5) and shall have the Independent Representative serve as
a director at all times.  Borrower will use its best efforts to have its Board
of Directors meet once each calendar quarter.   In the event that the number of
directors increases to a number greater than five (5), another Independent
Representative shall be appointed such that the number of Independent
Representatives is never less than twenty percent (20%) of the total number of
directors.  In addition to the above Independent Representative, Lender's Chief
Financial Officer shall have visitation rights with respect to each meeting of
Borrower's Board of Directors.

                                    -17-

<PAGE>

       6.3    APPRAISAL OF MATERIAL SOFTWARE.  From time to time during the term
of this Agreement, Lender may  request an independent appraisal of the value of
the Material Software.  Borrower shall use its best efforts to cooperate with
Lender in conducting appraisals of the Material Software.  Such appraisals shall
be conducted by an independent appraisal firm selected by Lender.  Lender shall
pay any and all expenses of such appraisal firm.

       6.4    ADDITIONAL ACTIONS IN CONNECTION WITH BORROWER'S STOCK OPTION 
PLAN.  During the term of this Agreement and for so long thereafter as the 
Purchase Options remain exercisable, Borrower shall take such actions as 
Lender or its counsel may request from time to time to provide that (i) the 
authorized option pool under the Stock Option Plan does not exceed ten 
percent (10%) of the outstanding Equity Securities of Borrower at any given 
time, on an as-converted/exercised basis, and (ii) that each share issued 
upon exercise of an option granted thereunder, as a condition precedent to 
issuance of such share, is subject to a pledge agreement and an option 
agreement on terms and conditions substantially identical to the Pledge 
Agreement and the Purchase Options. 

ARTICLE 7.    EVENTS OF DEFAULT.

       7.1    EVENTS OF DEFAULT.  The occurrence of any of the following shall
constitute an "Event of Default" under this Loan Agreement and the Note;
provided, however that if an Event of Default as specified in this Section 7.1
results from the unintentional acts or omissions of Borrower, and Borrower
immediately notifies Lender as soon as it becomes aware of any such
unintentional act or omission and otherwise undertakes to use its best efforts
to cure such Event of Default, it shall not be deemed an Event of Default for
purposes of Section 7.2, unless such Event of Default is not and cannot be cured
within thirty (30) days and has a Material Adverse Effect:

              (a)    FAILURE TO PAY.  Borrower shall fail to pay (i) when due
any principal payment on the due date hereunder or (ii) any interest or other
payment required under the terms of this Loan Agreement or any other Loan
Document on the date due and such payment shall not have been made within five
(5) days; or

              (b)    BREACHES OF CERTAIN COVENANTS.  Borrower shall fail to
observe or perform any covenant, obligation, condition or agreement set forth in
Section 5.1(f) or Section 5.2; or

              (c)    BREACHES OF OTHER COVENANTS.  Borrower shall fail to
observe or perform any other covenant, obligation, condition or agreement
contained in this Loan Agreement or the other Loan Documents (other than those
specified in Sections 7.1(a) and 7.1(b)) and (i) such failure shall continue for
fifteen (15) days, or (ii) if such failure is not curable within such fifteen
(15) day period, but is reasonably capable of cure within forty-five (45) days,
either (A) such failure shall continue for forty-five (45) days or (B) Borrower
shall not have commenced a cure in a manner reasonably satisfactory to Lender
within the initial fifteen (15) day period; or

              (d)    REPRESENTATIONS AND WARRANTIES.  Any representation,
warranty, certificate, or other statement (financial or otherwise) made or
furnished by or on behalf of Borrower to Lender in writing in connection with
this Loan Agreement or any of the other Loan Documents, or as an inducement to
Lender to enter into this Loan Agreement, shall be false, incorrect, incomplete
or misleading in any material respect when made or furnished; or

                                    -18-

<PAGE>

              (e)    OTHER PAYMENT OBLIGATIONS.  Borrower shall (A)(i) fail to
make any payment when due under the terms of any bond, debenture, note or other
evidence of Indebtedness to be paid by such Person (excluding this Loan
Agreement and the other Loan Documents but including any other evidence of
Indebtedness of Borrower to Lender) and such failure shall continue beyond any
period of grace provided with respect thereto, or (ii) default in the observance
or performance of any other agreement, term or condition contained in any such
bond, debenture, note or other evidence of Indebtedness, and (B) the effect of
such failure or default is to cause, or permit the holder or holders thereof to
cause Indebtedness in an aggregate amount of Fifty Thousand Dollars ($50,000) or
more to become due prior to its stated date of maturity; or

              (f)    VOLUNTARY BANKRUPTCY OR INSOLVENCY PROCEEDINGS.  Borrower
shall (i) apply for or consent to the appointment of a receiver, trustee,
liquidator or custodian of itself or of all or a substantial part of its
property, (ii) be unable, or admit in writing its inability, to pay its debts
generally as they mature, (iii) make a general assignment for the benefit of its
or any of its creditors, (iv) be dissolved or liquidated in full or in part, (v)
become insolvent (as such term may be defined or interpreted under any
applicable statute), (vi) commence a voluntary case or other proceeding seeking
liquidation, reorganization or other relief with respect to itself or its debts
under any bankruptcy, insolvency or other similar law now or hereafter in effect
or consent to any such relief or to the appointment of or taking possession of
its property by any official in an involuntary case or other proceeding
commenced against it, or (vii) take any action for the purpose of effecting any
of the foregoing; or

              (g)    INVOLUNTARY BANKRUPTCY OR INSOLVENCY PROCEEDINGS. 
Proceedings for the appointment of a receiver, trustee, liquidator or custodian
of Borrower or of all or a substantial part of the property thereof, or an
involuntary case or other proceedings seeking liquidation, reorganization or
other relief with respect to Borrower or the debts thereof under any bankruptcy,
insolvency or other similar law now or hereafter in effect shall be commenced
and an order for relief entered or such proceeding shall not be dismissed or
discharged within sixty (60) days of commencement; or

              (h)    JUDGMENTS.  A final judgment or order for the payment of
money in excess of Fifty Thousand Dollars ($50,000) (exclusive of amounts
covered by insurance issued by an insurer not an Affiliate of Borrower) shall be
rendered against Borrower and the same shall remain undischarged for a period of
thirty (30) days during which execution shall not be effectively stayed, or any
judgment, writ, assessment, warrant of attachment, or execution or similar
process shall be issued or levied against a substantial part of the property of
Borrower and such judgment, writ, or similar process shall not be released,
stayed, vacated or otherwise dismissed within thirty (30) days after issue or
levy; or

              (i)    LOAN DOCUMENTS.  Any Loan Document or any material term
thereof shall cease to be, or be asserted by Borrower not to be, a legal, valid
and binding obligation of Borrower enforceable in accordance with its terms or
if the Liens of Lender in any of the assets of Borrower shall cease to be or
shall not be valid, first priority perfected Liens or Borrower shall assert that
such Liens are not  valid, first priority and perfected Liens; or

              (j)    ERISA.  Any Reportable Event occurs which constitutes
grounds for the termination of any Employee Benefit Plan by the PBGC or for the
appointment of a trustee to administer any Employee Benefit Plan, or any
Employee Benefit Plan shall be terminated within the meaning of Title IV of
ERISA or a trustee shall be appointed to administer any Employee Benefit Plan;
or

              (k)    SALES OF COMPANY SECURITIES.  A Sale or offer of any Equity
Securities of Borrower; or  

                                    -19-

<PAGE>

              (l)    LOSS OF EMPLOYMENT OF KEY INDIVIDUALS. The termination of
employment of any of the employees executing the Employment Agreements, either
at the election of the employee or Borrower, except by reason of the death or
continued disability of such employee, or a Material Reduction in Employment
with respect to any of the employees executing the Employment Agreements; or  

              (m)    MATERIAL ADVERSE EFFECT.  One or more conditions exist or
events have occurred which could reasonably indicate, or reasonably result in, a
Material Adverse Effect. 

       7.2    RIGHTS OF LENDER UPON DEFAULT.  

              (a)    Except for an Event of Default covered by Section 7.2(b),
upon the occurrence or existence of any Event of Default (other than an Event of
Default referred to in Sections 7.1(f) and 7.1(g)) and at any time thereafter
during the continuance of such Event of Default, Lender may, by written notice
to Borrower, declare all outstanding Obligations payable by Borrower hereunder
to be immediately due and payable without presentment, demand, protest or any
other notice of any kind, all of which are hereby expressly waived, anything
contained herein or in the Note to the contrary notwithstanding. Upon the
occurrence or existence of any Event of Default described in Sections 7.1(f) and
7.1(g), immediately and without notice, all outstanding Obligations payable by
Borrower hereunder shall automatically become immediately due and payable,
without presentment, demand, protest or any other notice of any kind, all of
which are hereby expressly waived, anything contained herein or in the Note to
the contrary notwithstanding. 

              (b)    FORECLOSURE ON COLLATERAL FOR INTENTIONAL BREACH.   If an
Event of Default is caused by the intentional breach by Borrower of any of the
covenants contained in Section 5.2, Borrower acknowledges and agrees that Lender
may foreclose on the Collateral and Lender shall have no duty to, and Borrower
hereby waives any right that it may have to require Lender to, account to
Borrower for any surplus proceeds resulting from any such foreclosure.

              (c)    ADDITIONAL REMEDIES.   In addition to the foregoing
remedies, upon the occurrence or existence of any Event of Default, Lender may
exercise any other right, power or remedy granted to it by the Loan Documents,
including without limitation exercise of the Purchase Options, or otherwise
permitted to it by law, either by suit in equity or by action at law, or both.



ARTICLE 8.    CONFIDENTIAL INFORMATION.

       Each of Lender and Borrower agree not to use any Confidential Information
of the other party disclosed to it, for its own use or use by any other Person
or for any purpose except to carry out and perform its obligations under
agreements between Borrower and Lender, and not to disclose any such
Confidential Information except to employees (or consultants subject to
confidentiality provisions similar to this Article 8) who are required to have
such information in order to carry out and perform such obligations.  Borrower
and Lender will take all reasonable measures to protect the secrecy and avoid
disclosure or use of Confidential Information in order to prevent it from
entering the public domain or possession of Persons other than those Persons
authorized hereunder to have any such information, which measures shall include,
without limitation, the highest degree of care that each utilizes to protect its
own confidential information of a similar nature.  Either party shall notify the
affected party promptly in writing of any misuse or misappropriation of
Confidential Information which may come to such party's attention.

                                    -20-

<PAGE>

       For purposes of this section, "Confidential Information" means (a) the
terms of this Loan Agreement and the other Loan Documents and accompanying
transactions, as well as (b) any proprietary information, technical data, trade
secrets or know-how, including, without limitation, research, product plans,
products, services, customers, markets, software, developments, inventions,
processes, formulae, technology, designs, drawings, engineering, hardware
configuration information, marketing, finances or other business or
technological information disclosed by either party to the other either directly
or indirectly.  "Confidential Information" of a disclosing party does not
include any information which: (i) is known to the receiving party at the time
of disclosure; (ii) has become publicly known through no wrongful act of the
receiving party; (iii) has been rightfully received by the receiving party from
a third party without restriction on disclosure and without breach of any
agreement with the disclosing party; (iv) has been independently developed by
the receiving party as evidenced by appropriate documentation; (v) has been
approved for release by written authorization executed by an authorized officer
of the non-disclosing party; (vi) is required to be disclosed by the receiving
party pursuant to a Requirement of Law (including without limitation filing the
Loan Documents as exhibits to Lender's periodic reports required under the U.S.
securities laws); or (vii) (A) is not provided in writing or on magnetic media,
or (B) if provided orally, is not confirmed in writing to be confidential within
fifteen (15) days after disclosure.  Notwithstanding the foregoing, Borrower may
disclose generally to potential customers of Borrower the existence of a
collaborative relationship between Borrower and Lender, where such disclosure
does not include disclosure of any of the terms of this Loan Agreement or the
other Loan Documents.  Should Borrower wish to disclose the specific terms of
this Loan Agreement or the other Loan Documents to a potential investor or
investors, it shall first obtain written consent to such disclosure from Lender,
which consent shall not be unreasonably withheld with respect to bona fide
potential investors.  Notwithstanding the foregoing, Lender may issue a press
release with respect to the transactions contemplated hereby to the extent it
deems such disclosure necessary or advisable.

       Each party acknowledges that the other's Confidential Information is
unique property of extreme value to the other party, and that unauthorized use
or disclosure thereof would cause the other party irreparable harm that could
not be compensated by monetary damages. Accordingly, each party agrees that the
other will be entitled to injunctive and preliminary relief to remedy any actual
or threatened unauthorized use or disclosure of the other party's Confidential
Information.

       Nothing in this Article 8 is intended to supersede any existing agreement
between the parties under which confidential technical or market information has
or may be given by one party to the other.  As to matters not covered by such
existing agreements, this Article 8 shall control in the absence of any specific
agreement to the contrary.


ARTICLE 9.    MISCELLANEOUS.

       9.1    NOTICES.  Except as otherwise provided herein, all notices,
requests, demands, consents, instructions or other communications to or upon
Lender or Borrower under this Agreement or the other Loan Documents shall be in
writing and telecopied, mailed or delivered to each party at its telecopier
number or address set forth below (or to such other telecopier number or address
for any party as indicated in any notice given by that party to the other
party).  All such notices and communications shall be effective (a) when sent by
Federal Express or other overnight service of recognized standing, on the
Business Day following the deposit with such service; (b) when mailed by
registered or certified mail, first class postage prepaid and addressed as
aforesaid through the United States Postal Service, upon receipt; (c) when
delivered by hand, upon delivery; and 

                                    -21-

<PAGE>

(d) when telecopied, upon confirmation of receipt; PROVIDED, HOWEVER, that 
any notice delivered to Lender under Article 2 shall not be effective until 
received by Lender.

       Lender:       Summit Design, Inc.
                     9305 S.W. Gemini Drive
                     Beaverton, OR 97008-7158
                     Attn:  Chief Financial Officer
                     Telephone:  (503) 643-9281   
                     Telecopier:  (503) 646- 9320 

       Borrower:     Dasys, Inc.
                     3547 Shadeland Avenue
                     Pittsburgh, PA 15212
                     Attn:  Chief Executive Officer
                     Telephone:(412)
                     Telecopier: (412)   

       9.2    EXPENSES.  Each party shall bear its own expenses with respect to
the preparation, execution and delivery of this Agreement and the Loan
Documents; provided, however, that Borrower agrees that any fees and expenses
incurred by Borrower in excess of $40,000 shall not be eligible to be paid with
the proceeds of any Loan made hereunder.  Borrower shall pay on demand all
reasonable fees and expenses, including reasonable attorneys' fees and expenses,
incurred by Lender with respect to the exercise of its duties under this
Agreement and the other Loan Documents or with respect to any amendments or
waivers hereof requested by Borrower or in the enforcement or attempted
enforcement of any of the Obligations or in preserving any of Lender's rights
and remedies (including, without limitation, all such fees and expenses incurred
in connection with any "workout" or restructuring affecting the Loan Documents
or the Obligations or any bankruptcy or similar proceeding involving Borrower). 

       9.3    SURVIVAL OF REPRESENTATIONS AND WARRANTIES AND COVENANTS.  All
representations and warranties made by Borrower hereunder shall remain in effect
for so long as any Loans are outstanding.  All covenants made by Borrower
hereunder shall remain in effect for so long as any Loans are outstanding;
provided, however that the rights of Lender contained in Section 6 and the
covenants made by Borrower in Section 5.2, except for those in Section 5.2(a),
(l) and (j), shall survive the termination of this Agreement and remain in
effect for the term of the Purchase Options granted to Lender in connection with
this Agreement.  

       9.4    INDEMNIFICATION.

              (a)    Borrower shall indemnify, defend, and hold harmless Lender
and each of Lender's Subsidiaries, Affiliates, directors, officers, employees
and agents (collectively, the "INDEMNIFIED PERSONS"), and reimburse the
Indemnified Persons for, from, and against all demands, claims, actions or
causes of action, assessments, losses, damages, liabilities, costs and expenses,
including, without limitation, interest, penalties and reasonable attorneys'
fees, disbursements and expenses, arising out of or in connection with (i) any
breach by Borrower of any of the representations and warranties contained in
this Loan Agreement or the other Loan Documents, (ii) any failure by Borrower to
perform any covenant, undertaking or obligation hereunder, or (iii) any matter,
action or failure to act by the Indemnified Persons arising out of or relating
to thee Loan Documents, including without limitation any use by Borrower of any
proceeds of the Loans, except to the extent 

                                    -22-

<PAGE>

such liability arises from the gross negligence or willful misconduct of the 
Indemnified Person seeking indemnity hereunder.

              (b)    If any action or claim shall be brought or asserted 
against an Indemnified Person under this Section 9.4 in respect of which 
indemnity may be sought from Borrower under this Section 9.4, the Indemnified 
Person shall promptly notify Borrower who shall assume the defense thereof, 
including the employment of counsel reasonably satisfactory to the 
Indemnified Party and the payment of all reasonable expenses; except that any 
delay or failure to so notify Borrower shall only relieve the Borrower of its 
obligation hereunder to the extent, if at all, that it is prejudiced by 
reason of such delay or failure. The Indemnified Person shall have the right 
to employ separate counsel in any such action and participate in the defense 
thereof, but the fees and expenses of such counsel shall be at the expense of 
the Indemnified Party unless (i) the employment thereof shall have been 
specifically directed and required by the Borrower, (ii) the Borrower shall 
have elected not to assume the defense and employ counsel, or (iii) there 
exists an actual or potential conflict of interest between Lender and 
Borrower which, in the reasonable judgment of counsel to Lender, makes 
employing separate counsel advisable.  Without the prior written consent of 
the Indemnified Party, the Borrower shall have no right to settle or 
compromise on any nonmonetary matter.  This Section 9.4, in its entirety, 
shall survive termination of this Loan Agreement

       9.5    WAIVERS; AMENDMENTS.  Any term, covenant, agreement or condition
of this Agreement or any other Loan Document may be amended or waived if such
amendment or waiver is in writing and is signed by Borrower and Lender.  No
failure or delay by Lender in exercising any right hereunder shall operate as a
waiver thereof or of any other right nor shall any single or partial exercise of
any such right preclude any other further exercise thereof or of any other
right.  A waiver or consent given hereunder shall be effective only if in
writing and in the specific instance and for the specific purpose for which
given.

       9.6    SUCCESSORS AND ASSIGNS.  This Agreement and the other Loan
Documents shall be binding upon and inure to the benefit of Borrower, Lender,
all future holders of the Note and their respective successors and permitted
assigns, except that neither Lender nor Borrower may assign or transfer any of
its rights or obligations under any Loan Document without the prior written
consent of the other party; provided, however that a change in control of equity
ownership of Lender or other corporate proceeding whereby substantially all of
the assets or shares of Lender are sold or transferred to a third party shall
not be deemed to be an assignment for purposes of this Loan Agreement or any of
the Loan Documents.  All references in this Agreement to any Person shall be
deemed to include all successors and assigns of such Person.  Borrower shall
keep at its principal office a register in which Borrower shall provide for the
registration and transfer of the Note.  Upon surrender for registration of
transfer of a Note at the principal office of Borrower, Borrower shall execute
and deliver a new Note of like tenor and principal amount registered in the name
of such assign.  Prior to due presentment for registration of transfer to an
assign, Borrower may treat the Person in whose name such Note is registered as
the owner thereof for purposes of receiving payments and for all other purposes.

       9.7    SET-OFF.  In addition to any rights and remedies of Lender
provided by law, Lender shall have the right, without prior notice to Borrower,
any such notice being expressly waived by Borrower to the extent permitted by
applicable law, upon the occurrence and during the continuance of a Default or
an Event of Default, to set-off and apply against any indebtedness, whether
matured or unmatured, of Borrower to Lender (including, without limitation, the
Obligations), any amount owing from Lender to Borrower.  The aforesaid right of
set-off may be exercised by Lender against Borrower or against any trustee in
bankruptcy, debtor-in-possession, assignee for the benefit of creditors,
receiver or execution, judgment or attachment creditor of Borrower or against
anyone else claiming through or against Borrower or such trustee in bankruptcy,
debtor-in-possession, 

                                    -23-

<PAGE>

assignee for the benefit of creditors, receiver, or execution, judgment or 
attachment creditor, notwithstanding the fact that such right of set-off 
shall not have been exercised by Lender prior to the occurrence of a Default 
or an Event of Default.  Lender agrees promptly to notify Borrower after any 
such set-off and application made by Lender, PROVIDED that the failure to 
give such notice shall not affect the validity of such set-off and 
application.

       9.8    NO THIRD PARTY RIGHTS.  Nothing expressed in or to be implied from
this Agreement or any other Loan Document is intended to give, or shall be
construed to give, any Person, other than the parties hereto and thereto and
their permitted successors and assigns, any benefit or legal or equitable right,
remedy or claim under or by virtue of this Agreement or any other Loan Document.

       9.9    PARTIAL INVALIDITY.  If at any time any provision of this
Agreement is or becomes illegal, invalid or unenforceable in any respect under
the law of any jurisdiction, neither the legality, validity or enforceability of
the remaining provisions of this Agreement nor the legality, validity or
enforceability of such provision under the law of any other jurisdiction shall
in any way be affected or impaired thereby.

       9.10   ARBITRATION.  If any dispute arises with respect to this Agreement
or the Loan Documents or the transactions contemplated hereby or thereby, then
any party (the "DEMANDING PARTY") may demand, by written notice to each other
party to the dispute (collectively, the "RESPONDING PARTY"), that such issue
shall be settled by binding arbitration to be held in the city where the
Responding Party has its principal corporate office (an "ARBITRATION DEMAND"). 
All claims shall be settled by three arbitrators in accordance with the
Commercial Arbitration Rules then in effect of the American Arbitration
Association (the "ARBITRATION RULES").  The Demanding Party and the Responding
Party shall each designate one (1) arbitrator within fifteen (15) calendar days
after the delivery of the Arbitration Demand.  Such designated arbitrators shall
mutually agree upon and shall designate a third arbitrator.  The final decision
of a majority of the arbitrators shall be furnished to Demanding Party and the
Responding Party in writing and shall constitute a conclusive determination of
the issue in question, binding upon all parties and shall not be contested by
any of them. The non-prevailing party shall bear all costs and expenses
associated with such arbitration, including all arbitrators' fees and attorneys'
fees.

       9.11   COUNTERPARTS.  This Agreement may be executed in any number of
identical counterparts, any set of which signed by all the parties hereto shall
be deemed to constitute a complete, executed original for all purposes.


              [The remainder of this page is intentionally left blank.]














                                    -24-

<PAGE>

       IN WITNESS WHEREOF, the parties have executed this Loan Agreement as of
the date first set forth above.

SUMMIT DESIGN, INC.                DASYS, INC.
a Delaware corporation             a Pennsylvania corporation



By:       /s/ Larry Gerhard             By:      /s/ David Springer   
    -----------------------------          ----------------------------
Name:   Larry Gerhard                   Name:   David Springer   

Title:  President                       Title:  President 






























<PAGE>

                             SCHEDULE I

                             DEFINITIONS


     "AFFILIATE" shall mean, with respect to any Person, (a) each Person that,
directly or indirectly, owns or controls, whether beneficially or as a trustee,
guardian or other fiduciary, five percent (5%) or more of any class of Equity
Securities of such Person, (b) each Person that controls, is controlled by or is
under common control with such Person or any Affiliate of such Person or (c)
each of such Person's officers, directors, joint venturers and partners;
PROVIDED, HOWEVER, that in no case shall Lender be deemed to be an Affiliate of
Borrower for purposes of this Loan Agreement.  For the purpose of this
definition, "control" of a Person shall mean the possession, directly or
indirectly, of the power to direct or cause the direction of its management or
policies, whether through the ownership of voting securities, by contract or
otherwise.

     "AGGREGATE LOAN AMOUNT" shall have the meaning in Section 2.3(b).

     "ANNUALIZED REVENUE" shall mean the greater of (A) the product of (i) two
(2), multiplied by (ii) the sum of Net Revenue for each of the past two (2)
fiscal quarters of Borrower, or (B) the sum of Net Revenue for each of the last
four (4) fiscal quarters of Borrower.

     "BORROWER" shall have the meaning given to that term in clause (2) of the
introductory paragraph hereof.

     "BORROWER'S REPRESENTATIVES" shall mean David Springer and Eric Cooper,
or their respective successors of whom Lender has been notified in writing.

     "BUDGET" shall mean, initially the operating plan and budget of Borrower
attached as Schedule IV to this Agreement, and any subsequent operating budget
that has been delivered to the Budget Committee in accordance with Section
5.1(a)(vii) and approved by the Budget Committee in its sole discretion.

     "BUDGET COMMITTEE" shall mean a committee composed of three (3) members
of Borrower's Board of Directors, one of whom shall be the Independent
Representative, and Lender's Chief Financial Officer.  The Budget Committee
shall have authority to review and approve the Budget.

     "BUSINESS DAY" shall mean any day on which commercial banks are not
authorized or required to close in Beaverton, Oregon.

     "CAPITAL ASSET" shall mean, with respect to any Person, tangible property
owned or leased (in the case of a Capital Lease) by such Person, or any expense
incurred by any Person that is required by GAAP to be reported as an asset on
such Person's balance sheet.

     "CAPITAL EXPENDITURES" shall mean, with respect to any Person and any
period, all amounts expended and Indebtedness incurred or assumed by such Person
during such period for the acquisition of real property and other Capital Assets
(including amounts expended and Indebtedness incurred or assumed in connection
with Capital Leases).

     "CAPITALIZED LEASE OBLIGATIONS" shall mean any and all lease obligations
that, in accordance with GAAP, are required to be capitalized on the books of a
lessee.

                                    I-1

<PAGE>

     "CHARTER DOCUMENTS" shall mean, with respect to any Person, the Articles
or Certificate of Incorporation and Bylaws or any other organizational or
governing documents of such Person, in each case as amended to date.

     "CLOSING DATE" shall mean the date on which each of the conditions set
forth in Articles 4 shall have been satisfied or waived in writing and the Loans
are made.

     "CODE" shall mean the Internal Revenue Code of 1986, as amended from time
to time.

     "COLLATERAL" shall mean those assets, interests and Equity Securities
secured by the Security Agreement, the Intellectual Property Security Agreement
and the Pledge Agreement.

     "COMMON STOCK" shall mean the common stock of the applicable Person.

     "COMMON STOCK HOLDER" shall mean, collectively, any Person and all
Affiliates of such Person, in each case in whose name or for whose benefit
shares of Common Stock are registered or held.

     "CONFIDENTIAL INFORMATION" shall have the meaning given to that term in
Article 8.

     "CONTRACTUAL OBLIGATION" of any Person shall mean, any indenture, note,
security, deed of trust, mortgage, security agreement, lease, guaranty,
instrument, contract, agreement or other form of obligation or undertaking to
which such Person is a party or by which such Person or any of its property is
bound.

     "DEFAULT" shall mean any event or circumstance not yet constituting an
Event of Default but which, with the giving of any notice or the lapse of any
period of time or both, would become an Event of Default.

     "DISCLOSURE SCHEDULE" shall mean the Disclosure Schedule attached hereto
as Schedule III.

     "DISTRIBUTION AGREEMENT" shall have the meaning given in Section 4.1(f).

     "DOLLARS" and "$" shall mean the lawful currency of the United States of
America and, in relation to any payment under this Loan Agreement, same day or
immediately available funds.

     "DSI DISTRIBUTION AGREEMENT" shall mean that certain Distribution
Agreement dated September 20, 1996, by and between Design Solutions, Inc. and
Borrower.

     "EMPLOYEE BENEFIT PLAN" shall mean any employee benefit plan within the
meaning of section 3(3) of ERISA maintained or contributed to by Borrower or any
ERISA Affiliate, other than a Multiemployer Plan.

     "ENVIRONMENTAL LAWS" means all Requirements of Law relating to the
protection of human health or the environment, including, without limitation,
(a) all Requirements of Law, pertaining to reporting, licensing, permitting,
investigation, and remediation of emissions, discharges, releases, or threatened
releases of hazardous materials, chemical substances, pollutants, contaminants,
or hazardous or toxic substances, materials or wastes whether solid, liquid, or
gaseous in nature, into the air, surface water, groundwater, or land, or
relating to the manufacture, processing, distribution, use, treatment, storage,
disposal, transport, or handling of chemical substances, pollutants,
contaminants, or hazardous or toxic substances, materials, or wastes, whether
solid, liquid, or gaseous in nature; and (b) all Requirements of Law pertaining
to the protection of the health and safety of employees or the public.


                                    I-2

<PAGE>

     "EQUITY SECURITIES" of any Person shall mean (a) all common stock,
preferred stock, participations, shares, partnership interests or other equity
interests in and of such Person (regardless of how designated and whether or not
voting or non-voting) and (b) all warrants, options and other rights to acquire
any of the foregoing.

     "ERISA" shall mean the Employee Retirement Income Security Act of 1974,
as the same may from time to time be amended or supplemented, including any
rules or regulations issued in connection therewith.

     "ERISA AFFILIATE" shall mean any Person which is treated as a single
employer with Borrower under section 414 of the Code.

     "ESCROW AGENT" shall mean Data Securities International, Inc.

     "ESCROW AGREEMENT" shall have the meaning given in Section 5.1(h).

     "EVENT OF DEFAULT" shall have the meaning given to that term in Section
7.1.

     "FAIR MARKET VALUE OF BORROWER" shall mean on the date of any
determination, one (1) times the Annualized Revenue of Borrower.  For example,
if Fair Market Value of Borrower were to be calculated as of March 1, 2000, Fair
Market Value of Borrower would be equal to the greater of (A) the product of (i)
two (2), multiplied by (ii) the sum of Net Revenue in the fiscal quarter ended
September 30, 1999 plus Net Revenue in the fiscal quarter ended December 31,
1999, or (B) the sum of Net Revenue in each of the fiscal quarters ended March
31, 1999, June 30, 1999, September 30, 1999 and December 31, 1999. 

     "FAIR MARKET VALUE OF LENDER COMMON STOCK" shall mean the average of the
last sale prices of Lender's Common Stock on the Nasdaq National Market for ten
(10) trading days immediately preceding the relevant date of determination.
 
     "FINANCIAL STATEMENTS" shall mean, with respect to any accounting period
for any Person, statements of income and of cash flow of such Person for such
period, and balance sheets of such Person as of the end of such period, setting
forth in each case in comparative form figures for the corresponding period in
the preceding fiscal year if such period is less than a full fiscal year or, if
such period is a full fiscal year, corresponding figures from the preceding
fiscal year, all prepared in reasonable detail and in accordance with GAAP. 
Unless otherwise indicated, each reference to Financial Statements of any Person
shall be deemed to refer to Financial Statements prepared on a consolidated
basis.

     "FULLY DILUTED BASIS" shall mean, as of any date, with respect to
calculations involving the capital stock of any Person, making the assumption
that all convertible securities of such Person then outstanding were converted
on such date and that all options, warrants and similar rights to acquire shares
of capital stock of such Person were exercised on such date.

     "GAAP" shall mean generally accepted accounting principles and practices
as in effect in the United States of America from time to time, consistently
applied.

     "GM AGREEMENT" shall mean that certain Software License Agreement dated
January 16, 1996, as amended by Amendment dated June 26, 1997, by and between
General Motors Corporation and Borrower.

                                    I-3

<PAGE>

     "GOVERNMENTAL AUTHORITY" shall mean any domestic or foreign national,
state or local government, any political subdivision thereof, any department,
agency, authority or bureau of any of the foregoing, or any other entity
exercising executive, legislative, judicial, regulatory or administrative
functions of or pertaining to government.

     "GOVERNMENTAL CHARGES" shall mean all taxes, levies, assessments, fees,
claims or other charges imposed by any Governmental Authority upon or relating
to (i) Borrower, (ii) the Loans, (iii) employees, payroll, income or gross
receipts of Borrower, (iv) the ownership or use of any of its assets by
Borrower, or (v) any other aspect of the business of Borrower.

     "GOVERNMENTAL RULE" shall mean any law, rule, regulation, ordinance,
order, code interpretation, judgment, decree, directive, guidelines, policy or
similar form of decision of any Governmental Authority.

     "GUARANTY OBLIGATIONS" shall mean, with respect to any Person, any direct
or indirect liability of that Person with respect to any Indebtedness, lease,
dividend, letter of credit or other obligation (the "primary obligations") of
another Person (the "primary obligor"), including any obligation of that Person,
whether or not contingent, (a) to purchase, repurchase or otherwise acquire such
primary obligations or any property constituting direct or indirect security
therefor, or (b) to advance or provide funds (i) for the payment or discharge of
any such primary obligation, or (ii) to maintain working capital or equity
capital of the primary obligor or otherwise to maintain the net worth or
solvency or any balance sheet item, level of income or financial condition of
the primary obligor, or (c) to purchase property, securities or services
primarily for the purpose of assuring the owner of any such primary obligation
of the ability of the primary obligor to make payment of such primary
obligation, or (d) otherwise to assure or hold harmless the holder of any such
primary obligation against loss in respect thereof.

     "INDEBTEDNESS" of any Person shall mean and include the aggregate amount
of, without duplication (a) all obligations of such Person for borrowed money,
(b) all obligations of such Person evidenced by bonds, debentures, notes or
other similar instruments, (c) all obligations of such Person to pay the
deferred purchase price of property or services (other than accounts payable
incurred in the ordinary course of business determined in accordance with GAAP),
(d) all Capitalized Lease Obligations of such Person, (e) all obligations or
liabilities of others secured by a lien on any asset of such Person, whether or
not such obligation or liability is assumed, (f) all Guaranty Obligations of
such Person; (g) all obligations created or arising under any conditional sale
or other title retention agreement with respect to property acquired by such
Person (even if the rights and remedies of the seller or lender under such
agreement upon an event of default are limited to repossession or sale of such
property), (h) net exposure under interest rate interest rate swap, currency
swap, currency swap, forward, cap, floor or other similar contract that is not
entered to in connection with a bona fide hedging operation that provides
offsetting benefits to such Person, which agreements shall be marked to marked
on a current basis, (i) all reimbursement and other payment obligations,
contingent or otherwise, in respect of letters of credit.

     "INDEMNIFIED PERSONS" has the meaning given in Section 9.4.

     "INDEPENDENT REPRESENTATIVE" shall mean an individual not affiliated with
Borrower, either directly or indirectly, elected by Borrower to serve as a
director on Borrower's Board of Directors.

     "INVESTMENT" of any Person shall mean any loan or advance of funds by
such Person to any other Person (other than advances to employees of such Person
for moving and travel expense, drawing accounts and similar expenditures in the
ordinary course of business), any purchase or other acquisition of any Equity
Securities or 

                                    I-4

<PAGE>

Indebtedness of any other Person, any capital contribution by such Person to 
or any other investment by such Person in any other Person (including, 
without limitation, any Indebtedness incurred by such Person of the type 
described in CLAUSES (b) AND (c) of the definition of "Indebtedness" on 
behalf of any other Person); PROVIDED, HOWEVER, that Investments shall not 
include accounts receivable or other indebtedness owed by customers of such 
Person which are current assets and arose from sales in the ordinary course 
of such Person's business.

     "LENDER" shall have the meaning given in clause 1 of the introductory
paragraph hereof.

     "LENDER COMMON STOCK" shall mean the common stock of Lender, or such
other publicly traded equity securities of any successor of Lender.

     "LIEN" shall mean, with respect to any property, any security interest,
mortgage, pledge, lien, claim, charge or other encumbrance in, of, or on such
property or the income therefrom, including, without limitation, the interest of
a vendor or lessor under a conditional sale agreement, Capital Lease or other
title retention agreement, or any agreement to provide any of the foregoing, and
the filing of any financing statement or similar instrument under the Uniform
Commercial Code or comparable law of any jurisdiction.

     "LOAN" shall have the meaning given in Section 2.1.

     "LOAN AGREEMENT" shall mean this Loan Agreement.

     "LOAN DOCUMENTS" shall mean and include this Loan Agreement, the Note,
the Security Agreement, the Pledge Agreement, the Intellectual Property Security
Agreement, the Purchase Options, the Distribution Agreement and all other
documents, instruments and agreements delivered to Lender in connection with
this Loan Agreement.

     "LOANS" shall have the meaning given in Section 2.1.

     "MATERIAL ADVERSE EFFECT" shall mean a material adverse effect on (a) the
business, assets, operations, prospects or financial or other condition of
Borrower, taken as a whole; (b) the ability of Borrower to pay or perform the
Obligations in accordance with the terms of this Loan Agreement and the other
Loan Documents and to avoid an Event of Default under any Loan Document; or (c)
the rights and remedies of Lender under this Loan Agreement, the other Loan
Documents or any related document, instrument or agreement.

     "MATERIAL REDUCTION IN EMPLOYMENT"  shall be deemed to occur with respect
to an employee of Borrower if such employee ceases to work at least 40 hours per
week for a period of three (3) consecutive weeks, excepting accrued vacation
time and absence due to a bona fide illness.  Furthermore, the absence of an
employee for up to one (1) month due to family emergencies or up to two (2)
months for pregnancy shall not be deemed a Material Reduction in Employment,
provided that such an absence does not occur more frequently than once in any
given year. 

     "MATERIAL SOFTWARE" shall have the meaning given in Section 5.1(h).

     "MATURITY" shall mean, with respect to any Loan, interest, fees or other
amount payable by Borrower under this Loan Agreement or the other Loan
Documents, the date on which such Loan, interest, fee or other amount becomes
due, whether upon the stated maturity or due date, upon acceleration or
otherwise.

                                    I-5

<PAGE>

     "MATURITY DATE" shall have the meaning given in Section 2.3(a).

     "MONTHLY NOTICE" shall have the meaning given in Section 2.1(b)(i).

     "MULTIEMPLOYER PLAN" shall mean any multiemployer plan within the meaning
of section 3(37) of ERISA maintained or contributed to by Borrower or any ERISA
Affiliate.

     "NET REVENUE" shall mean Lender's gross sales attributable to Borrower's
Products (as such term is defined in the Distribution Agreement) minus
distributor discounts and commissions.

     "NOTE" shall mean the  Note in the form attached hereto as Exhibit A.

     "NOTICE OF BORROWING" shall have the meaning given in Section 2.1.

     "OBLIGATIONS" shall mean and include all loans, advances, debts,
liabilities, and obligations, howsoever arising, owed by Borrower to Lender of
every kind and description (whether or not evidenced by any note or instrument
and whether or not for the payment of money), direct or indirect, absolute or
contingent, due or to become due, now existing or hereafter arising pursuant to
the terms of this Loan Agreement or any of the other Loan Documents, including,
without limitation, all interest, fees, charges, expenses, reasonable attorneys'
fees and accountants' fees and expenses chargeable to Borrower or payable by
Borrower hereunder or thereunder.

     "PBGC" shall mean the Pension Benefit Guaranty Corporation, or any
successor thereto.

     "PERMITTED INDEBTEDNESS" shall mean and include:

          (a) Indebtedness of Borrower to Lender;

          (b) Indebtedness of Borrower under Capital Leases and operating
     leases to the extent that rental payments under such leases do not
     exceed, in the aggregate, One Hundred Thousand Dollars ($100,000) in any
     fiscal year;

          (c) Indebtedness arising from the endorsement of instruments in
     the ordinary course of business; and

          (d) Other Indebtedness of Borrower not exceeding Fifty Thousand
     Dollars ($50,000) at any time.

     "PERMITTED INVESTMENTS" shall mean and include: 

          (a) Deposits with commercial banks organized under the laws of
     the United States or a state thereof to the extent such deposits are
     fully insured by the Federal Deposit Insurance Corporation;

          (b) Investments in marketable obligations issued or fully
     guaranteed by the United States and maturing not more than one (1) year
     from the date of issuance; and

          (c) Investments in open market commercial paper rated at least
     "A1" or "P1" or higher by a national credit rating agency and maturing
     not more than one (1) year from the creation thereof.

                                    I-6

<PAGE>

          (d) Investments pursuant to or arising under currency
     agreements or interest rate agreements entered into in the ordinary
     course of business;

          (e) Investments consisting of deposit accounts of Borrower in
     which Lender has a perfected security interest; and

          (f) Other Investments aggregating not in excess of Fifty
     Thousand Dollars ($50,000) at any time.

     "PERMITTED LIENS" shall mean and include:

          (a) Liens for taxes or other Governmental Charges not at the
     time delinquent or thereafter payable without penalty or being contested
     in good faith, provided provision is made to the reasonable satisfaction
     of Lender for the eventual payment thereof if subsequently found payable;

          (b) Liens of carriers, warehousemen, mechanics, materialmen,
     vendors, and landlords incurred in the ordinary course of business for
     sums not overdue or being contested in good faith, provided provision is
     made to the reasonable satisfaction of Lender for the eventual payment
     thereof if subsequently found payable;

          (c) Deposits under workers' compensation, unemployment
     insurance and social security laws or to secure the performance of bids,
     tenders, contracts (other than for the repayment of borrowed money) or
     leases, or to secure statutory obligations of surety or appeal bonds or
     to secure indemnity, performance or other similar bonds in the ordinary
     course of business;

          (d) Liens arising out of a judgment or award in circumstances
     not constituting an Event of Default under Section 10.1(h);

          (e) Liens securing obligations under a Capital Lease if such
     lease is Permitted Indebtedness pursuant to clause (c) of the definition
     thereof and such Liens do not extend to property other than the property
     leased under such Capital Lease; and

          (f) Liens upon any equipment acquired or held by Borrower to
     secure the purchase price of such equipment or indebtedness incurred
     solely for the purpose of financing the acquisition of such equipment;

          (g) Easements, reservations, rights of way, restrictions, minor
     defects or irregularities in title and other similar charges or
     encumbrances affecting real property in a manner not materially or
     adversely affecting the value or use of such property;

          (h) Liens on insurance proceeds in favor of insurance companies
     to secure the financing of insurance premiums;

          (i) Liens which constitute rights of setoff of a customary
     nature or bankers' Liens with respect to amounts on deposit, whether
     arising by operation of law or by contract, in connection with
     arrangements entered into with banks in the ordinary course of business
     not relating to a financing transaction; and 

                                    I-7

<PAGE>

          (j) Liens in favor of Lender.

     "PERSON" shall mean and include an individual, a partnership, a 
corporation (including a business trust), a joint stock company, a limited 
liability company, an unincorporated association, a joint venture or other 
entity or a Governmental Authority.

     "PRIME RATE" shall mean the per annum rate publicly announced by
Citibank, N.A., from time to time in New York, New York.

     "PURCHASE OPTION" shall mean options to be executed and delivered by 
each holder of Equity Securities of Borrower on or prior to the initial 
Closing Date. Each Purchase Option shall be made in favor of Lender and 
shall, among other things, entitle Lender to purchase such Equity Securities 
at the Fair Market Value of Borrower on the date of exercise (on a pro rata 
percentage for the Equity Securities represented by each such Purchase 
Option).  The Purchase Options shall become exercisable on January 1, 2000 
and shall have a term of two (2) years thereafter; provided that the 
exercisability of the Purchase Options shall accelerate upon (i) an Event of 
Default under the Loan Agreement, or (ii) the prepayment of the Aggregate 
Loan Amount.  

     "REPORTABLE EVENT" shall have the meaning given to that term in ERISA and
applicable regulations thereunder.

     "REQUIREMENT OF LAW" applicable to any Person shall mean (a) the Charter
Documents of such Person, (b) any Governmental Rule applicable to such Person,
(c) any license, permit, approval or other authorization granted by any
Governmental Authority to or for the benefit of such Person and (d) any
judgment, decision or determination of any Governmental Authority or arbitrator,
in each case applicable to or binding upon such Person or any of its property or
to which such Person or any of its property is subject.

     "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

     "SOFTWARE" shall mean all of Borrower's proprietary products.

     "SUBSIDIARY" of any Person shall mean (a) any corporation of which more
than 50% of the issued and outstanding Equity Securities having ordinary voting
power to elect a majority of the Board of Directors of such corporation
(irrespective of whether at the time capital stock of any other class or classes
of such corporation shall or might have voting power upon the occurrence of any
contingency) is at the time directly or indirectly owned or controlled by such
Person, by such Person and one or more of its other Subsidiaries or by one or
more of such Person's other Subsidiaries, (b) any partnership, joint venture, or
other association of which more than 50% of the equity interest having the power
to vote, direct or control the management of such partnership, joint venture or
other association is at the time owned and controlled by such Person, by such
Person and one or more of the other Subsidiaries or by one or more of such
Person's other subsidiaries and (c) any other Person included in the Financial
Statements of such Person on a consolidated basis.  Any reference to a
Subsidiary without designation of the ownership of such Subsidiary shall be
deemed to refer to a Subsidiary of Borrower.

                                    I-8

<PAGE>


                             SCHEDULE II

                         NOTICE OF BORROWING

                    _____________________, 199__

Summit Design, Inc.
9305 S.W. Gemini Drive
Beaverton, OR 97008-7158
Attn:  Chief Financial Officer

          1.  Reference is made to that certain Loan Agreement, dated as
of July 16, 1997 (the "LOAN AGREEMENT"), between Dasys, Inc. ("BORROWER") and
Summit Design, Inc. ("LENDER").  Unless otherwise indicated, all terms defined
in the Loan Agreement have the same respective meanings when used herein.

          2.  Pursuant to SECTION 2.1 of the Loan Agreement, Borrower
hereby requests a Loan upon the following terms:

              (a)  The principal amount of the requested Loan is to be
          $__________;

              (b)  The date of the requested Loan is to be __________,
          199  .

          3.  Borrower hereby certifies to Lender that, on the date of
such borrowing and after giving effect to the requested borrowing:

              (a)  The expenses for the calendar quarter of Borrower
          ending ___________, 199_ are estimated to be approximately
          $___________.

              (b)  The representations and warranties set forth in
          Article 3 of the Loan Agreement will be true and correct as if
          made on such date;

              (c)  No Event of Default or Default has occurred and is
          continuing; and 

              (d)  Each of the Loan Documents remains in full force and
          effect.

          4.  Please disburse the proceeds of the requested Loan to
________________________.



      [The remainder of this page is intentionally left blank.]<PAGE>


















<PAGE>

          IN WITNESS WHEREOF, Borrower has executed this Notice of Borrowing
on the date set forth above.

                                        DASYS, INC.

                                        By:                
                                           ---------------------------

                                        Name:
                                             -------------------------

                                        Title:
                                              ------------------------


ACKNOWLEDGED AND APPROVED:

BUDGET COMMITTEE


By:  
   --------------------
Name:  C. Albert Koob
Title: Chief Financial Officer, Lender


By: 
   ---------------------------
Name:  
Title:  Chairman, Board of Directors, Borrower

























<PAGE>










                            SCHEDULE III

                         DISCLOSURE SCHEDULE

































<PAGE>











                             SCHEDULE IV

                               BUDGET



































<PAGE>

                              EXHIBIT A
                                NOTE
$2,500,000

     FOR VALUE RECEIVED, Dasys, Inc., a Pennsylvania corporation ("BORROWER"),
agrees to pay to the order of Summit Design, Inc., a Delaware corporation
("LENDER"), at Lender's principal office, the principal sum of Two Million Five 
Hundred Thousand Dollars ($2,500,000) or such lower amount as shall equal the
aggregate outstanding balance of the Loans, at such times as are set forth in,
and together with interest from the date hereof on the unpaid principal balance
thereof at the rates and on the dates provided in, the Loan Agreement dated as
of July 16, 1997, between Lender and Borrower (the "LOAN AGREEMENT").  If
Borrower shall have paid any interest on this Note in excess of that permitted
by law, then it is the express intent of Borrower and Lender that all excess
amounts previously collected by Borrower be applied to reduce the principal
balance of this Note, and the provisions hereof immediately be deemed reformed
and the amounts thereafter collectable as interest hereunder be reduced, without
the necessity of the execution of any new document, so as to comply with the
then applicable law, but so as to permit the recovery of the fullest amount
otherwise called for hereunder.

     Borrower shall make all payments hereunder to Lender as indicated in the
Loan Agreement, in lawful money of the United States and in same day or
immediately available funds.

     This Note is the Note referred to in the Loan Agreement.  This Note is
subject to the terms of the Loan Agreement, including the rights of prepayment
and the rights of acceleration of maturity.  Terms used herein have the meanings
assigned to those terms in the Loan Agreement, unless otherwise defined herein.

     THE OBLIGATIONS DUE UNDER THIS NOTE ARE SECURED BY A SECURITY AGREEMENT,
A STOCK PLEDGE AGREEMENT AND AN INTELLECTUAL PROPERTY SECURITY AGREEMENT, IN
EACH CASE DATED AS OF THE DATE HEREOF AND EXECUTED BY BORROWER OR THE
SHAREHOLDERS OF BORROWER, AS THE CASE MAY BE, IN FAVOR OF LENDER.  ADDITIONAL
RIGHTS OF THE HOLDER OF THIS NOTE ARE SET FORTH IN SUCH AGREEMENTS.

     If any action should be undertaken to collect this Note or enforce the
Lender's security interest herein, Borrower agrees to pay all costs and
expenses, including reasonable attorney's fees, incurred in connection with such
action.

     Borrower hereby waives notice of presentment, demand, protest or notice
of any other kind.  This Note shall be governed by and construed in accordance
with the laws of the State of Delaware.


                                        DASYS, INC.
                                        By: 
                                            -----------------------
                                        Name: 
                                             -----------------------
                                        Title:
                                              ----------------------












<PAGE>

Exhibit 11.1
                                       
                             SUMMIT DESIGN, INC.
                                       
                         STATEMENT OF COMPUTATION OF
                            NET INCOME PER SHARE 
                    (In thousands, except per share data)
                                       
<TABLE>
<CAPTION>
                                                Three Months Ended        Nine Months Ended
                                                   September 30,            September 30,
                                              ----------------------    ---------------------
                                                 1997        1996         1997        1996
                                              ---------    ---------    ---------   ---------
<S>                                           <C>          <C>          <C>         <C>
Weighted average number of common
  shares outstanding .......................     14,250        2,712       14,039       2,442
Common stock equivalents arising from
  Stock options (1) ........................          -        1,144            -       1,063
Convertible preferred shares (2) ...........          -        9,103            -           -
                                              ---------    ---------    ---------   ---------
                                                 14,250       12,959       14,039      12,608

Net income (loss)...........................  $(12,410)    $     212    $ (9,359)   $      25
                                              ---------    ---------    ---------   ---------
                                              ---------    ---------    ---------   ---------

Net income (loss) per share ................  $  (0.87)    $    0.02    $  (0.67)   $    0.00
                                              ---------    ---------    ---------   ---------
                                              ---------    ---------    ---------   ---------
</TABLE>

(1) Assumes exercise of all outstanding options and options issued within one 
    year of the date of the initial public offering which options are 
    considered exercised in all periods presented prior to the initial public 
    offering. Common stock equivalents are excluded from the calculation
    of earnings per share when the effect on earnings per share is 
    antidilutive. Had the common stock equivalents been included in the 
    earnings per share calculation, net loss per share for the three months 
    and nine months ended September 30, 1997 would have been $(0.82) and 
    $(0.63), respectively.

(2) Assumes conversion of all preferred shares outstanding as of the date of 
    the filing of the initial public offering which shares are considered 
    outstanding for all periods presented.



                                     -30-

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                          17,224
<SECURITIES>                                         0
<RECEIVABLES>                                    5,667
<ALLOWANCES>                                       449
<INVENTORY>                                          0
<CURRENT-ASSETS>                                22,961
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                  29,306
<CURRENT-LIABILITIES>                           12,605
<BONDS>                                              0
                                0
                                          0
<COMMON>                                           146
<OTHER-SE>                                      15,488
<TOTAL-LIABILITY-AND-EQUITY>                    29,306
<SALES>                                         21,486
<TOTAL-REVENUES>                                21,486
<CGS>                                              954
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                35,427
<LOSS-PROVISION>                                   120
<INTEREST-EXPENSE>                                  10
<INCOME-PRETAX>                                (8,539)
<INCOME-TAX>                                       820
<INCOME-CONTINUING>                            (9,359)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (9,359)
<EPS-PRIMARY>                                   (0.67)
<EPS-DILUTED>                                        0
        

</TABLE>


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