INTERLINK COMPUTER SCIENCES INC
10-Q, 1997-02-13
COMPUTER INTEGRATED SYSTEMS DESIGN
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                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON DC 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 December 31, 1996

                                       OR

 [ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD OF 
         FROM__________________TO________________

Commission file number 0-21077

                        INTERLINK COMPUTER SCIENCES, INC.
             (Exact name of registrant as specified in its charter)

         Delaware                                       94-2990567
(State of incorporation)                    (IRS Employer Identification Number)

                             47370 Fremont Boulevard
                            Fremont, California 94538
                                 (510) 657-9800

          (Address and telephone number of principal executive offices)

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

 Indicate by check mark whether 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, and (2) has been subject to such filing  requirements
  for the past 90 days.

                                   YES  X  NO
                                       ---    ---


   7,011,481 shares of the registrant's Common stock, $0.001 par value, were
                       outstanding as of January 1, 1997.


                                       1
<PAGE>

<TABLE>

                        INTERLINK COMPUTER SCIENCES, INC.
                                AND SUBSIDIARIES

                                    CONTENTS
<CAPTION>

                                                                                                                       Page
<S>                                                                                                                      <C>
                          PART I: FINANCIAL INFORMATION

Item 1.       Financial Statements
                  Condensed Consolidated Balance Sheets:
                      December 31, 1996 and June 30, 1996.................................................................4
                  Condensed Consolidated Statements of Operations:
                      Three and six months ended December 31, 1996 and 1995...............................................5
                  Condensed Consolidated Statements of Cash Flows:
                      Six months ended December 31, 1996 and 1995.........................................................6
                  Notes to Condensed Consolidated Financial Statements....................................................7

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


                           PART II: OTHER INFORMATION


Item 2        Changes in Securities......................................................................................26
Item 6        Exhibits and Reports on Form 8-K...........................................................................26

Signatures    ...........................................................................................................27

</TABLE>
                                                     2

<PAGE>





                          PART I: FINANCIAL INFORMATION



                                       3

<PAGE>
<TABLE>

                                         INTERLINK COMPUTER SCIENCES, INC. AND SUBSIDIARIES
                                                CONDENSED CONSOLIDATED BALANCE SHEETS
                                                           (in thousands)
<CAPTION>

                                                                                                   December 31,            June 30,
                                                                                                       1996                  1996
                                                                                                     --------              --------
                                                                                                    (unaudited)
<S>                                                                                                  <C>                   <C>     
ASSETS
Current assets:
     Cash and cash equivalents .........................................................             $ 27,061              $  6,121
     Accounts receivable, net ..........................................................                9,640                 9,445
     Inventories .......................................................................                1,327                   700
     Other current assets ..............................................................                2,615                 2,876
                                                                                                     --------              --------
         Total current assets ..........................................................               40,643                19,142
Property and equipment, net ............................................................                1,562                 1,281
Purchased software products ............................................................                2,467                 2,893
Other non-current assets ...............................................................                1,942                 2,609
                                                                                                     --------              --------
         Total assets ..................................................................             $ 46,614              $ 25,925
                                                                                                     ========              ========

LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
     Bank line of credit ...............................................................                                   $  5,000
     Current portion of long-term debt .................................................             $  1,867                 3,100
     Accounts payable ..................................................................                2,517                 2,662
     Accrued liabilities ...............................................................                6,024                 6,630
     Deferred maintenance and product revenue ..........................................                7,611                 8,121
                                                                                                     --------              --------
         Total current liabilities .....................................................               18,019                25,513
Long-term debt, less current portion ...................................................                  984                 2,892
Deferred maintenance revenue ...........................................................                  914                 1,056
Other liabilities ......................................................................                  887                 1,049
                                                                                                     --------              --------
     Total liabilities .................................................................               20,804                30,510
                                                                                                     --------              --------
Commitments and contingencies (Note 5)
Preferred stock ........................................................................                                      6,310
Common stock ...........................................................................               49,924                14,602
Cumulative translation adjustment ......................................................                 (542)                 (581)
Accumulated deficit ....................................................................              (23,572)              (24,916)
                                                                                                     --------              --------
     Total stockholders' equity (deficit) ..............................................               25,810                (4,585)
                                                                                                     --------              --------
         Total liabilities and stockholders' equity (deficit) ..........................             $ 46,614              $ 25,925
                                                                                                     ========              ========

<FN>
                               See accompanying notes to condensed  consolidated financial statements.
</FN>
</TABLE>
                                                                 4
<PAGE>


<TABLE>

                                         INTERLINK COMPUTER SCIENCES, INC. AND SUBSIDIARIES
                                           CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                               ( in thousands, except per share data)
<CAPTION>

                                                                            Three months ended                  Six months ended
                                                                                December 31,                       December 31,
                                                                                (unaudited)                        (unaudited)
                                                                          ------------------------         ------------------------
                                                                            1996            1995             1996            1995
                                                                          --------        --------         --------        --------
<S>                                                                       <C>             <C>              <C>             <C>     
Revenues:
      Product ....................................................        $  5,960        $  4,880         $ 10,792        $  7,914
      Maintenance and consulting .................................           3,673           3,284            7,566           6,815
                                                                          --------        --------         --------        --------
            Total revenues .......................................           9,633           8,164           18,358          14,729
                                                                          --------        --------         --------        --------

Cost of revenues:
      Product ....................................................             678           1,002            1,363           1,642
      Maintenance and consulting .................................           1,209           1,081            2,446           2,148
                                                                          --------        --------         --------        --------
            Total cost of revenues ...............................           1,887           2,083            3,809           3,790
                                                                          --------        --------         --------        --------

Gross profit .....................................................           7,746           6,081           14,549          10,939

Operating expenses:
      Product development ........................................           1,969           1,170            3,870           2,294
      Sales and marketing ........................................           3,194           3,033            6,258
                                                                                                                              5,538
      General and administrative .................................           1,107             955            2,019           1,788
      Purchased research and development and
         product amortization ....................................             139          10,158              301          10,158
                                                                          --------        --------         --------        --------
            Total operating expenses .............................           6,409          15,316           12,448          19,778
                                                                          --------        --------         --------        --------

Operating income (loss) ..........................................           1,337          (9,235)           2,101          (8,839)

Interest income, net .............................................             144              20               88              41
                                                                          --------        --------         --------        --------

Income (loss) before provision for income taxes ..................           1,481          (9,215)           2,189          (8,798)

Provision for (benefit from) income taxes ........................             578            (554)             847            (391)
                                                                          --------        --------         --------        --------

Net income (loss) ................................................        $    903        ($ 8,661)        $  1,342        ($ 8,407)
                                                                          ========        ========         ========        ========

Net income (loss) per share ......................................        $   0.12        $  (2.77)        $   0.19        $  (2.69)

                                                                          ========        ========         ========        ========

Shares used in per share calculation .............................           7,671           3,125            6,886           3,125
                                                                          ========        ========         ========        ========


<FN>
                               See accompanying notes to condensed  consolidated financial statements.
</FN>
</TABLE>
                                                                 5
<PAGE>

<TABLE>

                                         INTERLINK COMPUTER SCIENCES, INC. AND SUBSIDIARIES
                                           CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                                           (in thousands)
<CAPTION>

                                                                                                       Six months ended December 31,
                                                                                                           1996              1995
                                                                                                         --------          --------
                                                                                                                 (unaudited)
<S>                                                                                                      <C>     
Cash flows from operating activities:
     Net income (loss) .........................................................................            1,342            (8,407)
     Adjustments to reconcile net income (loss) to net cash
         provided by (used in) operating activities:
              Purchased research and development ...............................................             --              10,158
              Depreciation and amortization ....................................................              848               474
              Provision for doubtful accounts ..................................................              100                93
              Exchange gain ....................................................................              (32)              (76)
              Changes in operating assets and liabilities:
                  Accounts receivable ..........................................................             (195)           (2,209)
                  Inventories ..................................................................             (623)              195
                  Other assets .................................................................            1,027              (337)
                  Accounts payable .............................................................             (133)             (670)
                  Accrued liabilities ..........................................................             (618)           (1,031)
                  Deferred maintenance and product revenue .....................................             (713)            1,796
                  Other liabilities ............................................................             (156)               (2)
                                                                                                         --------          --------
                      Net cash provided by (used in) operating activities ......................              847               (16)
                                                                                                         --------          --------
Cash flows from investing activities:
     Acquisition of New Era, net of cash acquired ..............................................             --             (10,168)
     Proceeds from sale of available-for-sale securities .......................................             --               5,685
     Acquisition of property and equipment .....................................................             (714)             (199)
     Capitalization of software development costs ..............................................              (56)             --
     Purchase of available-for-sale securities .................................................             --              (3,160)
                                                                                                         --------          --------
                  Net cash used in investing activities ........................................             (770)           (7,842)
                                                                                                         --------          --------
Cash flows from financing activities:
     Proceeds from term loan ...................................................................             --               3,000
     Proceeds from bank line of credit .........................................................             --               5,000
     Payments on notes payable and other .......................................................           (3,045)             (251)
     Payments on bank line of credit ...........................................................           (5,000)           (1,300)
     Proceeds from issuance of common stock, net ...............................................           29,012                27
                                                                                                         --------          --------
                      Net cash provided by financing activities ................................           20,967             6,476
                                                                                                         --------          --------

                           Net increase (decrease) in cash and cash equivalents ................           21,044            (1,382)

Effect of exchange rate changes on cash ........................................................             (104)               58
Cash and cash equivalents, beginning of period .................................................            6,121             4,148
                                                                                                         --------          --------
Cash and cash equivalents, end of period .......................................................         $ 27,061          $  2,824
                                                                                                         ========          ========

SUPPLEMENTAL CASH FLOW DISCLOSURES
     Interest paid .............................................................................         $    177          $    148
     Income taxes paid .........................................................................         $  1,412          $    132
     Non cash transactions from financing activities:
         Conversion of preferred stock to common
              stock in connection with initial public offering .................................         $  6,310              --

<FN>

                               See accompanying notes to condensed  consolidated financial statements.
</FN>
</TABLE>

                                                                 6
<PAGE>

               INTERLINK COMPUTER SCIENCES, INC. AND SUBSIDIARIES
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (unaudited)

1.   Basis of Presentation:

     The unaudited condensed  consolidated  financial statements included herein
     have  been  prepared  by  Interlink   Computer   Sciences,   Inc.  and  its
     subsidiaries  (collectively,  the  "Company") in accordance  with generally
     accepted accounting principles and reflect all adjustments, consisting only
     of normal  recurring  adjustments,  which in the opinion of management  are
     necessary to fairly present the Company's  consolidated financial position,
     results  of  operations,  and cash  flows for the  periods  presented.  The
     financial  statements  include  the  accounts of the Company and its wholly
     owned subsidiaries  after intercompany  balances and transactions have been
     eliminated.  These financial  statements should be read in conjunction with
     the Company's  June 30, 1996 audited  consolidated  financial  statement as
     included in the  Company's  Registration  Statement on Form S-1 as declared
     effective  by the  Securities  and Exchange  Commission  on August 15, 1996
     (Reg. No. 333-05243).  The consolidated results of operations for the three
     and six months ended  December 31, 1996 are not  necessarily  indicative of
     the  results to be  expected  for any  subsequent  period or for the entire
     fiscal year  ending June 30,  1997.  The June 30,  1996  balance  sheet was
     derived  from  audited  financial  statements,  but  does not  include  all
     disclosures required by generally accepted accounting principles.

2.   Inventories:

     Inventories  are  stated at the lower of cost  (determined  on a  first-in,
     first-out  basis) or  market.  Inventories  are  principally  comprised  of
     finished goods at December 31, 1996 and June 30, 1996.

3.   Initial Public Offering:

     On August 15, 1996, the Company sold  2,200,000  shares of its Common Stock
     in an initial  public  offering and on September  16, 1996,  an  additional
     330,000  shares of Common Stock were sold when the  Company's  underwriters
     exercised their over-allotment option, which sales of Common Stock together
     were made at $10.00  per share  and  which  generated  approximately  $22.1
     million of cash,  net of  underwriting  discounts,  commissions,  and other
     offering  costs.  On August 16, 1996, the Common Stock began trading on the
     NASDAQ  National  Market under the symbol INLK.  Upon the completion of the
     offering, all of the Company's 1,230,000 shares of Series 1 Preferred Stock
     were converted into shares of Common Stock on a one-for-one basis.

4.   Computation of Net Income (Loss) Per Share:

     Net income (loss) per share is computed  using the weighted  average number
     of common and  common  equivalent  shares  outstanding  during the  period.
     Common equivalent shares are included in the per share  calculations  where
     the effect of their inclusion would be dilutive. Dilutive equivalent shares
     consist of the  incremental  common  shares  issuable  upon  conversion  of
     convertible  preferred  stock (using the "if  converted"  method) and stock
     options and  warrants,  using the  modified  treasury  stock  method in all
     periods.  Pursuant to Securities and Exchange  Commission  Staff Accounting
     Bulletin No. 83, common and common  equivalent shares issued by the Company
     during the twelve  months  preceding  the filing of the  Company's

                                       7
<PAGE>

     initial  public  offering,  using the treasury  stock method and the public
     offering  price per share,  have been  included in the  calculation  of net
     income (loss) per share for all periods presented.

5.   Contingencies

     The  Company  and the  Company's  subsidiary  in France are  involved  in a
     commercial  dispute  with a former  Italian  distributor  of the  Company's
     TCPaccess products.  The former distributor alleged in a letter sent to the
     Company  that the  Company  had  breached  and  unlawfully  terminated  the
     agreement  pursuant  to  which  the  former  distributor  was  appointed  a
     distributor  of the Company's  products in Italy and asserted other related
     claims against the Company.  The letter  demanded the former  distributor's
     reinstatement  as a  distributor,  the execution of a written  distribution
     agreement setting forth the distribution  arrangements between the parties,
     and  compensation  in an  unspecified  amount  to be  paid  to  the  former
     distributor  for the harm  that it has  suffered.  The  Company's  Canadian
     subsidiary,  New Era, has also previously used the former  distributor as a
     distributor  of  the  HARBOR  products  in  Italy  pursuant  to a  separate
     agreement.  No legal claim has been filed nor has arbitration  been invoked
     by the former  distributor  regarding  this matter.  No  provision  for any
     liability  that may result upon  resolution of this matter has been made in
     the  accompanying  financial  statements.  Should  the  former  distributor
     initiate  legal  proceedings  and  prevail on such  claims,  the  Company's
     business, financial condition and results of operations could be materially
     adversely affected.

     During the quarter the Company  settled a  commercial  dispute  with MSB, a
     former  Belgian  distributor  of  the  Company's  TCPaccess  products.  The
     settlement included a payment to MSB in the amount of $100,000.  All claims
     and counterclaims  relating to this dispute have been dismissed as a result
     of the settlement.

6.   Subsequent Event

     On January 27, 1997, the Company  signed a definitive  agreement with Cisco
     Systems,  Inc. ("Cisco")  regarding a strategic alliance to jointly develop
     and market  IOS/390,  a software  suite that extends  Cisco's  Internetwork
     Operating  System (IOS)  networking  technologies to IBM and compatible MVS
     mainframes and mainframe applications. As part of the alliance, on December
     12, 1996,  Cisco  purchased  622,000  newly-issued  shares of the Company's
     Common Stock (approximately nine percent (9%) of the Company's  outstanding
     shares) for approximately $6.8 million.


                                       8
<PAGE>

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

The following  Management's  Discussion and Analysis of Financial  Condition and
Results of Operations contains forward-looking statements that involve risks and
uncertainties.  The Company's actual results could differ  materially from those
discussed  herein.  Factors that could cause or contribute  to such  differences
include,  but are not limited to, those  discussed in the section below entitled
"Risk Factors That May Affect Future  Results," as well as those risks discussed
in this section and elsewhere in this Report.

The following  discussion  should be read in conjunction  with the  management's
discussion  included  in the  Company's  Registration  Statement  on Form S-1 as
declared effective by the Securities and Exchange  Commission on August 15, 1996
(Reg. No. 333-05243).

Overview

The Company offers a suite of  high-performance,  network transport products and
systems management  applications which efficiently transport,  store and protect
the  integrity  of  mission-critical  data and  applications.  The  Company  was
incorporated in December 1985 and initially focused its products and development
on  providing   interoperability  between  IBM  mainframes  and  DECnet  network
environments. In 1990, the Company acquired the core technology of its TCPaccess
suite of  products.  In  December  1995 the  Company  acquired  New Era  Systems
Services,  Ltd. ("New Era"),  the developer of the HARBOR  products,  a software
product  line  providing   enterprise   systems   management   applications  for
client/server networks. This transaction was accounted for as a purchase.  Prior
to the  acquisition,  the  Company  distributed  the HARBOR  products in certain
countries in Europe for more than one year. New Era is a wholly-owned subsidiary
headquartered in Calgary, Alberta.

<TABLE>

Results of Operations

The  following  table sets forth,  as a percentage  of total  revenues,  certain
condensed consolidated statement of operations data for the periods indicated:
<CAPTION>

                                                                                  Three months                     Six months
                                                                                ended December 31,              ended December 31,
                                                                               --------------------           ---------------------
                                                                               1996            1995            1996           1995
                                                                               -----          -----           -----          -----
<S>                                                                            <C>            <C>             <C>            <C>  
Revenues:
     Product .........................................................          61.9%          59.8%           58.8%          53.7%
     Maintenance and consulting ......................................          38.1           40.2            41.2           46.3
                                                                               -----          -----           -----          -----
         Total revenues ..............................................         100.0          100.0           100.0          100.0
                                                                               -----          -----           -----          -----

Cost of revenues:
     Product .........................................................           7.0           12.3             7.4           11.1
     Maintenance and consulting ......................................          12.6           13.2            13.3           14.6
                                                                               -----          -----           -----          -----
         Total cost of revenues ......................................          19.6           25.5            20.7           25.7
                                                                               -----          -----           -----          -----

Gross profit .........................................................          80.4           74.5            79.3           74.3
Operating expenses:
     Product development .............................................          20.4           14.3            21.1           15.6


                                       9
<PAGE>


     Sales and marketing .............................................          33.2          (37.2)           34.1           37.6
     General and administrative ......................................          11.5          (11.7)           11.0           12.1
     Purchased research and development
         and product amortization ....................................           1.4         (124.4)            1.7           69.0
                                                                               -----          -----           -----          -----
         Total operating expenses ....................................          66.5         (187.6)           67.9          134.3
                                                                               -----          -----           -----          -----

Operating income (loss) ..............................................          13.9         (113.1)           11.4          (60.0)
Interest income, net .................................................           1.5           (0.2)            0.5            0.3
                                                                               -----         -----            -----          -----
     Income (loss) before income taxes ...............................          15.4         (112.9)           11.9          (59.7)
Provision for (benefit from) income taxes ............................           6.0           (6.8)            4.6           (2.6)
                                                                               -----          -----           -----          -----
Net income (loss) ....................................................           9.4%        (106.1)%           7.3%         (57.1)%
                                                                               =====         ======           =====          =====  

Cost of sales as a percentage of the related revenues:
     Product .........................................................          11.4%          20.5%           12.6%          20.7%
     Maintenance and consulting ......................................          32.9%          32.9%           32.3%          31.5%

</TABLE>

As a result  of the  acquisition  of New Era in  December  1995,  the  Company's
operating  results for the three and six months ended December 31, 1996 and 1995
are not directly comparable.

Revenues:

The Company's  revenues are derived from product  sales and related  maintenance
and consulting  contracts.  Product  revenues are derived from software  license
fees and sales of related hardware to end users, resellers and distributors. The
Company's  sales  cycle,  from  the  date  the  sales  agent  first  contacts  a
prospective  customer to the date a customer ultimately  purchases the Company's
product,  is typically three to six months for the TCPaccess products and six to
nine months for the HARBOR products.  Because licenses are noncancellable and do
not impose  significant  obligations  on the  Company,  the  Company  recognizes
software  license  revenues  upon  completion of a trial period and receipt of a
signed  contract.  Fees for service  revenues  are charged  separately  from the
Company's  product sales. The Company  recognizes  maintenance  revenues ratably
over  the term of  agreement.  Maintenance  agreements  are  typically  one-year
renewable contracts,  pursuant to which, historically, a substantial majority of
the Company's  maintenance  agreements have been renewed upon expiration.  There
can be no assurance that  customers will continue to renew expiring  maintenance
agreements at the historical rate. The Company recognizes consulting revenues as
services are accepted. The Company no longer actively markets its DECnet product
line. As a consequence, maintenance revenues from this product line may continue
to decline in the future.

Total  revenues  were $9.6  million and $8.2  million for the three months ended
December 31, 1996 and 1995, respectively, representing an increase of 17%. Total
revenues were $18.4 million and $14.7 million for the six months ended  December
31, 1996 and 1995, respectively,  representing an increase of 25%. Product sales
were $6.0 million and $4.9 million for the three months ended  December 31, 1996
and 1995,  respectively,  representing  an increase of 22%.  Product  sales were
$10.8  million and $7.9 million for the six months  ended  December 31, 1996 and
1995,  respectively,  representing  an increase  of 37%.  These  increases  were
primarily due to an increase in TCPaccess  license fees and associated  hardware
sales as well as the addition of revenues from Harbor products.  Maintenance and
consulting  revenues  were $3.7  million and $3.3  million for the three  months
ended December 31, 1996 and 1995, respectively, 

                                       10
<PAGE>

representing an increase of 12%.  Maintenance and consulting  revenues were $7.6
million and $6.8  million for the six months  ended  December 31, 1996 and 1995,
respectively,   representing  an  increase  of  12%.  These  increases  resulted
principally from an increase in the number of customers  purchasing  maintenance
agreements.

Cost of Revenues:

         Product.  Cost of revenues  from product  sales  consists  primarily of
hardware, product media, documentation and packaging costs. Cost of revenues for
product  sales was $678,000 and  $1,002,000,  representing  11% and 21% of total
product  revenues  for the  three  months  ended  December  31,  1996 and  1995,
respectively.  Cost of revenues for product sales was $1,363,000 and $1,642,000,
representing  13% and 21% of total  product  revenues  for the six months  ended
December 31, 1996 and 1995, respectively. These percentage decreases were due to
a reduction  in  third-party  revenue and a decline in hardware  revenue,  which
carry higher  product costs as a percentage of their  respective  revenues.  The
decrease in the  percentage  of cost of revenues  from  product  sales is due to
product mix and is not  necessarily  indicative of cost of revenues from product
sales in future quarters.

         Maintenance  and  Consulting.  Cost of revenues  from  maintenance  and
consulting  consists  primarily of personnel related costs incurred in providing
telephone  support and software  updates.  Cost of revenues from maintenance and
consulting  was  $1.2  million  and  $1.1  million,  representing  33% of  total
maintenance and consulting revenues for the three months ended December 31, 1996
and 1995, respectively. Cost of revenues for maintenance and consulting was $2.4
million and $2.1 million,  representing 32% of total  maintenance and consulting
revenues for the six months ended December 31, 1996 and 1995, respectively . The
absolute  dollar  increases  were due to  staff  additions  as a  result  of the
acquisition of New Era.

Operating Expenses:

Total operating  expenses were $6.4 million and $15.3 million,  representing 67%
and 188% of total  revenues  for the three  months  ended  December 31, 1996 and
1995,  respectively.  Total  operating  expenses  were $12.4  million  and $19.8
million,  representing  68% and 134% of total  revenues for the six months ended
December 31, 1996 and 1995, respectively .

         Product Development.  Product development expenses consist primarily of
personnel related costs. Product development expenses were $2.0 million and $1.2
million,  representing  20% and 14% of total revenues for the three months ended
December 31, 1996 and 1995, respectively. Product development expenses were $3.9
million and $2.3 million, representing 21% and 16% of total revenues for the six
months  ended  December  31, 1996 and 1995,  respectively.  These  increases  in
product  development  expenses  resulted  from the  expansion  of the  Company's
product  line as a result  of the  acquisition  of New Era and  ongoing  product
development efforts.

         Sales and Marketing.  Sales and marketing expenses consist primarily of
salaries and commissions for sales and marketing  personnel,  the fixed costs of
worldwide sales offices,  and promotional  costs.  The Company sells through its
direct sales force, resellers and distributors.  The direct channel produced 89%
and 85% of product  revenues for the three  months  ended  December 31, 1996 and
1995, respectively, and 85% and 90% of product revenues for the six months ended
December 31, 1996 and 1995, respectively. Sales and marketing expenses were $3.2
million and $3.0  million,  representing  33% and 37% of total  revenues for the
three  months  ending  December  31,  1996 and  1995,  respectively.  Sales  and
marketing expenses were $6.3 million and $5.5 million,  representing 34% and 38%
of total  revenues  for the six  months  ending  December  31,  1996  and  1995,

                                       11
<PAGE>

respectively.   The  increase  in  absolute  dollars  was  a  result  of  higher
commissions, marketing program costs and the New Era acquisition

         General and Administrative. General and administrative expenses include
personnel and other costs of the finance,  human  resources  and  administrative
departments of the Company,  and includes  gains and losses on foreign  currency
exchange.  General  and  administrative  expenses  were  $1.1  million  and $1.0
million,  representing 12% of total revenues for the three months ended December
31, 1996 and 1995,  respectively  General and administrative  expenses were $2.0
million and $1.8 million, representing 11% and 12% of total revenues for the six
months ended December 31, 1996 and 1995, respectively. These increases in dollar
amounts  for  general  and  administrative  are  attributable  to the  increased
headcount required to support the Company's expansion.

         Purchased Research and Development and Product Amortization.  Purchased
research  and  development  and  product  amortization  was  $139,000  and $10.2
million,  representing  1% and 124% of total revenues for the three months ended
December 31, 1996 and 1995, respectively. Purchased research and development and
product amortization was $301,000 and $10.2 million,  representing 2% and 69% of
total   revenues  for  the  six  months  ended   December  31,  1996  and  1995,
respectively.  These decreases were due to a one-time write-off of $10.2 million
of purchased  research and  development  related to the New Era  acquisition  in
December 1995.

         Interest  Income  (Expense)  Net. Net interest  income was $144,000 and
$20,000 for the three months ended December 31, 1996 and 1995, respectively. Net
interest  income was $88,000 and $41,000 for the six months  ended  December 31,
1996 and 1995,  respectively.  The increases  were due primarily to reduction of
bank borrowings  related to the New Era Acquisition and interest earned on funds
received from the initial public offering.

         Provision  for(Benefit  from) Income  Taxes.  The income tax  provision
(benefit) was $578,000 and  $(554,000)  for the three months ended  December 31,
1996 and 1995, respectively. The income tax provision (benefit) was $847,000 and
($391,000)  for the six months ended  December 31, 1996 and 1995,  respectively.
The effective  tax rate for both the three months and six months ended  December
31, 1996 was approximately  39%. Benefit from income taxes for the three and six
months  ended  December  31,  1995,  was the result of the Company  reducing its
valuation allowance during the quarter ended December 31, 1995.

Recent Pronouncements

During March 1995, the Financial Accounting Standards Board issued Statement No.
121,  "Accounting  for the  Impairment of Long-Lived  Assets and for  Long-Lived
Assets to Be Disposed Of" (SFAS 121),  which  requires the Company to review the
impairment of long-lived assets, certain identifiable intangibles,  and goodwill
related to those assets  whenever  events or changes in  circumstances  indicate
that the  carrying  amount  of an asset  may not be  recoverable.  SFAS 121 will
become effective for the Company's 1997 fiscal year.

During October 1995, the Financial  Accounting  Standards Board issued Statement
No. 123, "Accounting for Stock-Based Compensation" (SFAS 123), which establishes
a fair value based  method of  accounting  for stock based  compensation  plans.
While the Company is studying the impact of the  pronouncement,  it continues to
account for employee  stock  options under APB Opinion No. 25,  "Accounting  for
Stock  Issued  to  Employees."  SFAS  123 will be  effective  for  fiscal  years
beginning after December 15, 1995.


                                       12

<PAGE>

Liquidity and Capital Resources

Working  capital  increased  at December 31, 1996 over that at December 31, 1995
primarily due to the proceeds from the initial public offering and proceeds from
the equity investment from Cisco.

For the six months  ended  December  31,  1996,  net cash  provided by operating
activities resulted primarily from net income, depreciation and amortization and
a  decrease  in  other  assets,  partially  offset  by  a  decrease  in  accrued
liabilities  and  deferred  maintenance  and product  revenue and an increase in
inventories.  For the six  months  ended  December  31,  1995,  net cash used in
operations was primarily  from net loss and an increase in accounts  receivable,
partially  offset by  purchased  research  and  development  and an  increase in
deferred maintenance and product revenue.

For the six months ended December 31, 1996, the Company's  investing  activities
have  consisted  primarily of purchases of property and  equipment.  For the six
months ended December 31, 1995,  the Company's  investing  activities  consisted
primarily  of the  acquisition  of New Era and the  redemption  and  purchase of
available-for-sale securities.

Net cash provided by financing  activities for the six months ended December 31,
1996 consisted  primarily of proceeds from the initial  public  offering and the
equity investment by Cisco,  partially offset by payments on bank line of credit
and notes  payable.  For the six months ended  December 31, 1995,  the Company's
financing  activities  consisted  of proceeds  and  payments on the bank line of
credit, term loan and notes payable.

The Company's  business is geographically  dispersed  resulting in a significant
portion of its cash residing  outside the United  States.  At December 31, 1996,
approximately 20% of the Company's cash was in European and Canadian accounts.

At December 31, 1996, the Company had $27.1 million in cash and cash equivalents
and $22.6 million in working  capital.  The Company had $9.6 million in accounts
receivable, net of allowance for doubtful accounts, and $8.5 million of unearned
revenues, substantially all of which are expected to be earned over the 12 month
period following December 31, 1996.

The  Company  believes  that its  current  cash  balance  and its cash flow from
operations,  if any, will be sufficient to meet its anticipated  working capital
and capital expenditure requirements for at least the next 12 months.

RISK FACTORS THAT MAY AFFECT FUTURE RESULTS

The Company operates in a rapidly changing environment that involves a number of
risks, some which are beyond the Company's control, and include the following:

Competition

     General. The market in which the Company operates is intensely  competitive
and is  characterized  by  extreme  price  competition  and rapid  technological
change.  The  competitive  factors  influencing  the markets  for the  Company's
products include product performance, price, reliability, features, scalability,
interoperability across multiple platforms, adherence to industry standards, and
the provision of support and maintenance  services.  The

                                       13
<PAGE>

Company competes with a number of companies,  principally International Business
Machines Corp. ("IBM"),  that specialize in one or more of the Company's product
lines, and such  competitors may have greater  financial,  technical,  sales and
marketing  resources to devote to the  development,  promotion and sale of their
products, and may have longer operating histories, greater name recognition, and
greater market  acceptance for their products and services  compared to those of
the Company. There can be no assurance that the Company's current competitors or
any new market entrants will not develop networked systems  management  products
or  other  technologies  that  offer  significant  performance,  price  or other
advantages over the Company's technologies, the occurrence of which would have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of operations.

     Network  Transport  Products.  The  Company  sells its  TCPaccess  suite of
products  principally to customers who have  installed IBM mainframes  using the
MVS operating system.  The Company's main competition for its TCPaccess products
is IBM. IBM sells TCP/IP and associated  products for its MVS mainframe  systems
that  compete  directly  with the  Company's  TCPaccess  product  line.  IBM has
continued to enhance the  functionality  and  performance of its TCP/IP product,
which  enhancements  may require the Company to update its TCPaccess  product to
remain  competitive.  There can be no assurance that the Company will be able to
make the improvements in its TCPaccess product  necessary to remain  competitive
with IBM or that any such  improvements by IBM would not have a material adverse
effect on the Company's business,  financial condition or results of operations.
In addition, IBM's OS/390 operating system, which includes TCP/IP communications
software in a bundle of software provided to purchasers of OS/390,  has been and
is aggressively  marketed by IBM, and the Company  believes it has lost sales of
the Company's  TCP/IP products as a result.  An IBM customer can request to have
the IBM TCP/IP  product  removed  from the software  bundle  provided by IBM and
thereby reduce the purchase price of the system purchased.  The reduction in the
purchase price related to the exclusion of IBM's TCP/IP for MVS product from its
software bundle, in certain model groups, is substantially  lower than the price
the customer would have to pay to purchase the Company's corresponding TCPaccess
product. Because in some IBM model groups IBM's TCP/IP product is less expensive
to purchase  than the  Company's  corresponding  TCPaccess  products in the same
model groups, there could be substantial erosion of the Company's margins if the
Company reduces the price of its TCPaccess  products in order to compete against
IBM,  which  erosion  would  have a  material  adverse  effect on the  Company's
business,  financial condition and results of operations.  Also, IBM has in some
cases  included and may continue to include its TCP/IP  product in the bundle of
software  provided to purchasers of its OS/390  operating system without charge.
The  Company  believes  that any  general  reduction  in price of the IBM TCP/IP
products,  or the widespread  bundling of those  products  without charge in its
OS/390 operating  system,  would require the Company to either reduce the prices
of  its  TCPaccess  products  or  substantially  increase  sales  and  marketing
expenses,  or both, in order to continue to sell its TCPaccess  products,  which
actions  would  have  a  material  adverse  effect  on the  Company's  business,
financial  condition  and results of  operations.  In  addition,  if IBM were to
develop or design  its OS/390  operating  system or other  products  so that its
TCP/IP  product could not be removed,  customers  who otherwise  would have been
inclined to purchase the Company's  TCPaccess product may not do so, which would
have a material adverse effect on the Company's  business,  financial  condition
and  results of  operations.  In  addition,  the Company  derives a  substantial
portion  of  its  revenues  from  maintenance   agreements  with  its  TCPaccess
customers.  If  the  Company  sells  fewer  TCPaccess  products,  either  due to
competition from IBM or otherwise,  the Company's  maintenance revenues would be
reduced,  which would have a material adverse effect on the Company's  business,
financial condition and results of operations. If IBM reduces the combined price
of its TCP/IP  products and  maintenance,  IBM's  combined  price for its TCP/IP
products and  maintenance  would be more price  competitive  with the  Company's
product  line,  and the  Company's  product and  maintenance  revenues  would be
adversely  

                                       14
<PAGE>

affected.  The  Company  also  competes  with  IBM,  Apertus  Technologies  Inc.
("Apertus"),  Computerm Corporation  ("Computerm"),  Network Solutions, Inc. and
Memorex Telex Corp.  ("Memorex")  in the network  controller  market,  where the
Company   resells  the  network   controller   manufactured   by  Bus-Tech  Inc.
("Bus-Tech"), a division of Storage Technology Corp. ("Storage Technology"),  to
provide  the  hardware  connection  which  links  the  enterprise  server to the
client/server network.

     System Management  Applications.  The primary competitors for the Company's
HARBOR Backup and HARBOR Distributed Storage Server products are IBM and Storage
Technology.  The  Company's  competition  for the  HARBOR  Distribution  product
includes IBM, Novadigm, Inc. ("Novadigm") and Tangram Enterprise Solutions, Inc.
IBM is aggressively  marketing its ADSM backup product, which is included in the
System View package on IBM's UNIX system,  AIX.  There can be no assurance  that
IBM will not include the ADSM backup  products in a software  "bundle"  with the
sale of its  mainframe  hardware  systems.  The bundling of  competing  software
products with mainframe hardware systems could have a material adverse effect on
the  Company's  business,  financial  condition and results of  operations.  The
Company also competes with software  vendors who develop and market products for
UNIX  and  Windows  NT  operating   systems,   such  as  Microsoft   Corporation
("Microsoft"),  Arcada Software, Inc., Computer Associates International,  Inc.,
EMC Corporation,  Hewlett-Packard  Company, Legato Systems Inc. ("Legato") (with
whom the Company has a strategic  alliance),  Novadigm,  OpenVision  Technology,
Inc., PLATINUM Technology, Inc., Sterling Software, Inc., Sun Microsystems, Inc.
and Unison Software,  Inc., which are focusing on enterprise  systems management
applications.  Although  the  Company  recently  signed  a  strategic  marketing
agreement  with  Legato,  the  Company  is still a  competitor  of Legato in the
storage management  market. The Company also expects increased  competition from
vendors of TCP/IP-to-Systems  Network  Architecture gateway products,  including
such companies as Microsoft, Novell, Inc., Apertus and CNT/Brixton Systems, Inc.
Competition  from these  companies  could  increase due to an expansion of their
product lines or a change in their approaches to enterprise  systems  management
or  networking  products.  The  bundling of network  transport  software  with a
network  controller by these  competitors could prevent the Company from selling
TCPaccess  to the  customers of these  competitors,  which would have a material
adverse  effect on the Company's  business,  financial  condition and results of
operations.

     Other Factors.  The Company's  ability to compete  successfully  depends on
many factors,  including the Company's  success in developing  new products that
implement new technologies,  performance,  price, product quality,  reliability,
success of competitors' products, general economic conditions, and protection of
Interlink  products by effective  utilization of intellectual  property laws. In
particular,  competitive  pressures from existing or new  competitors  who offer
lower prices or other incentives or introduce new products could result in price
reductions which would adversely affect the Company's  profitability.  There can
be no assurance  that the Company's  current or other new  competitors  will not
develop  enhancements to, or future  generations of,  competitive  products that
offer superior price or performance  features,  that the Company will be able to
compete  successfully in the future, or that the Company will not be required to
incur   substantial   additional   investment   costs  in  connection  with  its
engineering,  research,  development,  marketing and customer service efforts in
order to meet  any  competitive  threat.  The  Company  expects  competition  to
intensify,  and increased  competitive pressure could cause the Company to lower
prices for its products,  or result in reduced  profit margins or loss of market
share,  any of which  could  have a  material  adverse  effect on the  Company's
business, financial condition and results of operations.


                                       15
<PAGE>


Reliance on IBM and Emergence of Mainframe as Enterprise Server

     The Company's  current software  products are designed for use with IBM and
IBM-compatible mainframe computers. Specifically, these software products target
users of the MVS  operating  system,  the Customer  Information  Control  System
communications  subsystem and the IMS and DB2 database  management systems. As a
result, future sales of the Company's existing products and associated recurring
maintenance  revenues are dependent  upon  continued use of mainframes and their
related systems software. In addition, because the Company's products operate in
conjunction  with IBM  systems  software,  changes to IBM systems  software  may
require the Company to adapt its products to these changes, and any inability to
do so, or delays in doing so,  may  adversely  affect  the  Company's  business,
financial  condition  and  results  of  operations.  Currently,  TCP/IP  is  the
communications   protocol  for  the  Internet  and  is  being  adopted  by  some
organizations as the communications  protocol for their client/server local area
networks and wide area  networks.  This  adoption has allowed IBM MVS  mainframe
computers to act as enterprise  servers on such networks.  The use of mainframes
as enterprise servers is relatively new and still emerging. The Company's future
financial  performance will depend in large part on the acceptance and growth in
the  market   for   centralized   network   management.   Adoption   of  another
communications   protocol   on   client/server   networks   could  make   TCP/IP
communication  not viable,  which would  undermine  the demand for the Company's
TCPaccess  products,  and  have a  material  adverse  effect  on  the  Company's
business, financial condition and results of operations.

Dependence on Distributors and Strategic Relationships

     The Company's  sales are primarily made through the Company's  direct sales
force  and  the  Company's  distributors  in  international  markets.  A  former
distributor of the Company's TCPaccess products in Italy,  Selesta  Integrazioni
SRL  ("Selesta"),  has  threatened  legal action over the recent  termination of
Selesta as a distributor of the Company's  TCPaccess  products.  The Company has
also  discontinued its existing  distributor  relationship  with Selesta for the
distribution of the Company's  HARBOR products in Italy and Spain.  The loss of,
or a significant reduction in revenues from, the Company's  distributors through
which the Company sells its products could have a material adverse effect on the
Company's business,  financial condition and results of operations. In addition,
if one of the Company's distributors declares bankruptcy,  becomes insolvent, or
is declared  bankrupt before the distributor  remits to the Company the payments
for the Company's  products,  the Company may not be able to obtain the revenues
to which it would be entitled  for sales made by such  distributor  prior to the
bankruptcy or insolvency  proceeding.  In addition,  the Company's  distributors
generally offer other products and these  distributors  may give higher priority
to sales of such other products.

     Alliance  with  Legato.  In May 1996 the Company  entered  into a strategic
marketing agreement with Legato. The Company has no historical relationship with
Legato,  and there can be no assurance that the Company will be able to sell its
products through Legato.

      Alliance  with  Cisco.  In  January,  1997,  the  Company  entered  into a
strategic  alliance with Cisco pursuant to which Cisco and the Company agreed to
cooperate to develop  certain TCP/IP  software that operates with Cisco products
and to have Cisco sell such  products.  This alliance  requires that the Company
devote a substantial portion of the Company's software development resources and
personnel to the development of such products,  that the Company bundle a number
of its existing  products into the new Cisco products,  that Cisco and Interlink
jointly  market  the  products,  and that  Cisco  and  Interlink  share  support
obligations for customers of the products.

                                       16
<PAGE>

      To date,  all of the Company's  core  technologies  have been acquired and
have not been developed internally.  There can be no assurance that the software
development can be completed  successfully,  in a timely manner,  or at all. The
alliance may divert the Company from developing  other  stand-alone  products or
enhancing  existing  stand-alone  products  to  compete  against  IBM or others,
allowing IBM or others to sell more advanced products to the Company's  customer
base prior to the  availability of the new products beings developed with Cisco,
which could result in loss of sales and maintenance revenue,  which would have a
material  adverse effect on the Company's  business,  financial  condition,  and
results of operations. Furthermore, the timing of software development cannot be
predicted with accuracy,  and the Company's software development efforts for the
Cisco products will be subject to technological  risks including the possibility
that the software will not operate with Cisco's products in a manner  acceptable
to customers,  that the software may not be compatible with customers' networks,
that the bundling of the Company's software will result in unforeseen  technical
obstacles,  that  Cisco and the  Company  may  disagree  about  the  development
objectives, or that competitors,  including IBM, will develop competing products
that make the jointly developed products obsolete. In addition, Cisco may not be
successful  in marketing  the jointly  developed  software once the products are
completed, and the Company is not guaranteed any minimum sales revenues from the
alliance.  Because the Company is not  permitted  to sell the jointly  developed
products  independently of Cisco,  the Company,  after incurring the substantial
costs of  development  and  diversion of resources  away from  developing  other
products, may not receive sufficient revenues from Cisco sales, which would have
a material adverse effect on the Company's business,  financial  condition,  and
results of  operations.  There can be no assurance that Cisco will be successful
in selling the jointly  developed  products or that the Company will receive any
revenues from such products.

         The Company has no significant  experience  working with Cisco, and the
alliance  with  Cisco is  subject to all the risks  inherent  in such  strategic
relationships  including  the  failure of the  parties to meet their  respective
obligations  under  the  terms of the  alliance,  the risk of loss of  rights to
important  intellectual property either jointly developed in connection with the
alliance or  otherwise,  and the risk of a dispute  over key  provisions  of the
alliance.  There can be no assurance that the parties will meet their objectives
under the terms of the  alliance or that the Company  will not lose control over
its  intellectual  property.  The failure of either the Company or Cisco to meet
their  obligations under the terms of the alliance would have a material adverse
effect  on  the  Company's  business,   financial  condition,   and  results  of
operations.

     The  Company  is  currently  investing,  and plans to  continue  to invest,
significant  resources to develop  additional  relationships,  which investments
could adversely  affect the Company's  operating  margins.  The Company believes
that its success in penetrating  markets for its products  depends in large part
on  its  ability  to  maintain  these  relationships,  to  cultivate  additional
relationships  and  to  cultivate  alternative   relationships  if  distribution
channels  change.  There  can  be no  assurance  that  any  distributor,  system
integrator or strategic  partner will not discontinue its relationship  with the
Company, form competing arrangements with the Company's competitors,  or dispute
the Company's other strategic relationships.

New Products and Rapid Technological Change

     The  markets  for the  Company's  network  transport  products  and systems
management  applications are  characterized  by rapidly  changing  technologies,
evolving  industry  standards,  frequent  new  product  introductions  and rapid
changes in customer  requirements.  The Company believes that its future success
will depend upon its ability to develop,  manufacture  and market products which
meet changing user needs, to continue to enhance its products and to develop and
introduce in a timely manner new products that take  advantage of  technological

                                       17
<PAGE>

advances,   keep  pace  with  emerging  industry  standards,   and  address  the
increasingly  sophisticated  needs of its  customers.  There can be no assurance
whether  TCP/IP will  continue to be  accepted as a  communications  protocol on
client/server networks.  Furthermore, there can be no assurance that the Company
will be successful  in  developing  and  marketing,  on a timely basis,  product
enhancements or new products,  either  independently or with strategic partners,
that respond to technological  change or evolving industry  standards,  that the
Company  will not  experience  difficulties  that  could  delay or  prevent  the
successful  development,  introduction  and sale of these products,  or that any
such new products or product  enhancements will adequately meet the requirements
of the  marketplace  and achieve  market  acceptance.  The Company's  failure or
inability  to adapt its  products  to  technological  changes or to develop  new
products  successfully  would have a material  adverse  effect on the  Company's
business, financial condition and results of operations.

     The  introduction or announcement of products by the Company or one or more
of  its   competitors,   including  but  not  limited  to  IBM,   embodying  new
technologies,  or changes  in  customer  requirements  or the  emergence  of new
industry  standards and practices could render the Company's  existing  products
obsolete and  unmarketable.  As markets for the Company's  products  develop and
competition  increases,  the Company  anticipates  that product life cycles will
shorten and average selling prices will decline. In particular,  average selling
prices and gross  margins for each of the  Company's  products  are  expected to
decline as each product matures. There can be no assurance that the introduction
or  announcement  of new product  offerings by the Company or one or more of its
competitors will not cause customers to defer  purchasing the existing  products
of the Company or that the Company will successfully  manage the transition from
older  products to new or enhanced  products in order to minimize  disruption in
customer  ordering.  Such  deferment  of  purchases  or  inability to manage the
transition  of products  could have a material  adverse  effect on the Company's
business,  financial condition and results of operations. In addition, there can
be no  assurance  that  the  Company  will  successfully  identify  new  product
opportunities, develop and bring to market in a timely manner such new products,
or that  products  or  technologies  developed  by others  will not  render  the
Company's products or technologies noncompetitive or obsolete.

Fluctuations in Operating Results; Absence of Backlog; Seasonality

     The Company's  operating results have historically  been, and will continue
to be, subject to quarterly fluctuations due to a variety of factors, including:
expenditures on research and development,  timely introduction,  enhancement and
market acceptance of new versions of the Company's  products;  seasonal customer
demand;  timing of significant  orders;  changes in the pricing  policies by the
Company or its competitors;  anticipated and unanticipated  decreases in average
unit selling prices of the Company's products; increased competition; changes in
the mix of the products  sold and in the mix of sales by  distribution  channel;
the gain or loss of significant  customers;  the introduction of new products or
product enhancements by competitors;  currency fluctuations;  and the failure to
anticipate changing customer product  requirements.  In addition,  the impact of
revenues,  if any, from the Cisco alliance cannot be estimated at this time. The
Company  typically sells its products through a trial process to allow customers
to evaluate the  effectiveness  of the  Company's  products  before  determining
whether to proceed with broader deployment of such products. The Company's sales
cycle,  from the date the sales agent first  contacts a prospective  customer to
the date a customer  ultimately  purchases the Company's  product,  is typically
three to six months for the  TCPaccess  products  and six to nine months for the
HARBOR  products.  There can be no  assurance  however that the  customers  will
purchase the  Company's  products  after such trial period or that the Company's
sales cycle will not lengthen,  exposing it to the  possibility of shortfalls in
quarterly revenues,  which could have a material adverse effect on the Company's
business, financial condition or results of operations and cause results to vary
from period to period. The Company's  operating results will also be affected by
general  economic and other  conditions  affecting the timing of customer orders
and capital spending, and order cancellations or rescheduling.  Furthermore,  it
is possible that the Company's  products may be found to be defective  after the
Company has already  shipped in volume such products.  There can be no assurance
that  defects in the  Company's  products or failures in the  Company's  product
quality,  performance  and  reliability,  will not  occur  and such  defects  or
failures  will not have a material  adverse  effect on the  Company's  business,

                                       18
<PAGE>

financial  condition  and  results of  operations.  If such  defects or failures
occur,  the  Company  could  experience  a decline in revenue,  increased  costs
(including warranty expense and costs associated with customer support),  delays
in or  cancellations  or  rescheduling  of orders or  shipments,  and  increased
product  returns,  any of which  would  have a  material  adverse  effect on the
Company's business, financial condition and results of operations.

     The  Company  operates  with very  little  backlog  and most of its product
revenues  in each  quarter  result  from orders  closed in that  quarter,  and a
substantial  majority of those orders are  completed at the end of that quarter.
The Company  establishes its expenditure  levels for sales,  marketing,  product
development and other operating expenses based in large part on its expectations
as to future  revenues,  and  revenue  levels  below  expectations  could  cause
expenses to be disproportionately high. If revenues fall below expectations in a
particular quarter, operating results and net income are likely to be materially
adversely  affected.  Any  inability  of  the  Company  to  adjust  spending  to
compensate  for  failure  to  meet  sales  forecasts  or  to  collect   accounts
receivable,  or any unexpected increase in product returns or other costs, could
magnify the adverse impact of such events on the Company's operating results.

     The  Company's  business  has  experienced  and is  expected to continue to
experience significant seasonality. The Company has higher sales of its software
products in the  quarters  ending in December  and June and weaker  sales in the
quarters ending in September and March.  The decrease in product revenues in the
quarters  ending in  September  is due to the  international  customer  seasonal
buying  patterns.  The  quarters  ending in March are  historically  weak due to
government and large organization  annual budgeting cycles. Due to the foregoing
factors,   quarterly   revenue  and   operating   results  are  likely  to  vary
significantly in the future and  period-to-period  comparisons of its results of
operations  are not  necessarily  meaningful  and should  not be relied  upon as
indications  of future  performance.  Further,  it is likely that in some future
quarters  the  Company's   revenue  or  operating  results  will  be  below  the
expectations of public market analysts and investors.  In such event,  the price
of the Company's Common Stock would likely be materially adversely affected.

Integration of Acquisition; History of Acquired Technologies

     The Company has only one year of  operations  on a combined  basis with New
Era,  the  developer  of the HARBOR  products,  which the  Company  acquired  in
December  1995 in a purchase  transaction.  There can be no  assurance  that the
Company will be successful in  integrating  the  operations and personnel of New
Era into its business,  incorporating the HARBOR products and any other acquired
technologies into its product lines,  deriving significant future sales from the
HARBOR  products,  establishing  and maintaining  uniform  standards,  controls,
procedures and policies, avoiding the impairment of relationships with employees
and customers as a result of changes in management, or overcoming other problems
that may be  encountered in connection  with the  integration of New Era. To the
extent that the Company is unable to  accomplish  the  foregoing,  the Company's
business,  financial  condition  and results of  operations  would be materially
adversely  affected.  The  expansion  of  installed  IOS/390  sites will provide
increased sales  opportunities for HARBOR and other Interlink  applications. 

                                       19

<PAGE>

     As the Company  transitions  to this  model,  there could be some impact on
near-term  business  and a more  gradual  growth in overall  Systems  Management
Applications.  In  addition,  in order to sell the HARBOR  product,  the Company
established a direct HARBOR sales channel in the U.S. and  integrated the HARBOR
product  into its  European  sales  channel.  Given that lead time for closing a
HARBOR sale can be as much as nine months, the ability of the Company to produce
significant  HARBOR product sales in future  periods is highly  dependent on the
Company's  success with these changes.  If the Company is  unsuccessful  in such
implementation,  HARBOR product sales will likely not increase over the level of
sales during the  calendar  year ended  December  31,  1996,  which could have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of operations.

     To  date,  the  Company's  core  technologies  for  its  principal  network
transport  products and systems  management  applications have been acquired and
have not been developed  internally.  There can be no assurance that the Company
will have the opportunity to successfully acquire or develop new technologies in
the future or that such technology,  if acquired, can be successfully integrated
and  commercialized  by  the  Company.  An  inability  to  acquire,  develop  or
commercialize  new  technologies  would  have a material  adverse  effect on the
Company's business,  financial condition and results of operations.  The Company
may also seek to acquire or invest in businesses,  products or technologies that
expand,  complement  or otherwise  relate to the Company's  current  business or
product  line.  There  can  be no  assurance  that  such  acquisitions  will  be
successfully  or   cost-effectively   integrated  into  the  Company's   current
operations,  or that  the  acquired  technologies  will  provide  the  necessary
complement  to  the  Company's  current  products.  If the  Company  consummates
additional  acquisitions  in the  future  that must be  accounted  for under the
purchase  method of  accounting,  such  acquisitions  would likely  increase the
Company's  amortization  expenses.  In addition,  any such acquisitions would be
subject  to the risks of  integration  mentioned  above.  The  Company  does not
currently have any understandings, commitments or agreements with respect to any
potential acquisition or corporate partnering arrangements,  nor is it currently
engaged in any discussions or negotiations with respect to any such transaction.

Reliance on and Risks Associated with International Sales

     During the three  months  ended  December  31, 1996 and 1995,  41% and 46%,
respectively,  of the  Company's  total  revenues  were  derived  from  sales to
international  customers.  The Company's international sales have been primarily
to European  markets,  and sales are generally  denominated in local currencies.
The Company  expects that  international  revenue  will  continue to represent a
significant  portion of its total  revenue.  The  Company  intends to enter into
additional  international  markets  and to  continue  to expand  its  operations
outside  of  North  America  by  expanding   its  direct  sales  force,   adding
distributors and pursuing additional strategic  relationships which will require
significant  management  attention  and  expenditure  of  significant  financial
resources.  To the  extent  that  the  Company  is  unable  to  make  additional
international  sales  in a timely  manner,  the  Company's  growth,  if any,  in
international  revenues will be limited,  and the Company's business,  financial
condition and results of  operations  would be  materially  adversely  affected.
Sales to  international  customers  are subject to  additional  risks  including
longer receivables collection periods, greater difficulty in accounts receivable
collection,  failure of distributors to report sales of the Company's  products,
political and economic  instability,  nationalization,  trade restrictions,  the
impact of possible  recessionary  environments  in economies  outside the United
States,  reduced protection for intellectual  property rights in some countries,
currency  fluctuations  and  tariff  regulations  and  requirements  for  export
licenses. There can be no assurance that foreign intellectual property laws will
adequately  protect the Company's  intellectual  property  rights.  In addition,
effective copyright and trade secret protection may be unavailable or limited in
certain foreign countries.  Substantially all of the

                                       20
<PAGE>

Company's  distribution  and other  agreements with  international  distributors
require any dispute  between  the Company and any  distributor  to be settled by
arbitration.  Under these  agreements,  the party  bringing the action,  suit or
claim is required to conduct the  arbitration  in the domicile of the defendant.
The result is that, if the Company has a cause of action against a party, it may
not be feasible  for the  Company to pursue such  action,  as  arbitration  in a
foreign  country  could prove to be  excessively  costly and have a less certain
outcome  depending  on the  laws  and  customs  in the  foreign  country.  These
international  factors could have a material  adverse  effect on future sales of
the  Company's  products  to  international  end users  and,  consequently,  the
Company's business, financial condition and results of operations.

     Most  of  the  Company's  international  sales  are  denominated  in  local
currencies.  The Company has not  historically  attempted  to reduce the risk of
currency  fluctuations by hedging except in certain limited  circumstances where
the Company has held an account  receivable  expected  to be  outstanding  for a
period of at least 12 months.  The Company may be disadvantaged  with respect to
its competitors operating in foreign countries by foreign currency exchange rate
fluctuations that make the Company's  products more expensive  relative to those
of  local  competitors.  The  Company  may  attempt  to  reduce  these  risks by
continuing to hedge in certain limited transactions in the future.  Accordingly,
changes in the  exchange  rates or exchange  controls may  adversely  affect the
Company's  results of  operations.  There can be no assurance that the Company's
current or any future currency  exchange strategy will be successful in avoiding
exchange  related losses or that any of the factors listed above will not have a
material  adverse  effect  on the  Company's  future  international  sales  and,
consequently,  on the  Company's  business,  financial  condition and results of
operations.

Dependence  Upon  Proprietary   Technology;   Risk  of  Third-Party   Claims  of
Infringement

     The Company's  success and ability to compete is dependent in part upon its
proprietary  information.  The Company  relies  primarily  on a  combination  of
copyright and trademark laws, trade secrets, software security measures, license
agreements and  nondisclosure  agreements to protect its proprietary  technology
and software products. There can be no assurance,  however, that such protection
will be adequate to deter  misappropriation,  deter  unauthorized  third parties
from  copying  aspects  of, or  otherwise  obtaining  and using,  the  Company's
software  products  and  technology  without  authorization,  or that the rights
secured thereby will provide competitive advantages to the Company. In addition,
the  Company  cannot be  certain  that  others  will not  develop  substantially
equivalent or superseding  proprietary  technology,  or that equivalent products
will not be  marketed  in  competition  with  the  Company's  products,  thereby
substantially   reducing  the  value  of  the  Company's   proprietary   rights.
Furthermore,  there  can be no  assurance  that any  confidentiality  agreements
between  the  Company  and its  employees  or any  license  agreements  with its
customers  will provide  meaningful  protection  for the  Company's  proprietary
information  in  the  event  of  any  unauthorized  use or  disclosure  of  such
proprietary information.

     There  can be no  assurance  that  others  will not  independently  develop
similar  products or duplicate  the  Company's  products.  Despite the Company's
efforts to protect its proprietary rights,  unauthorized  parties may attempt to
copy aspects of the Company's products or to obtain and use information that the
Company regards as  proprietary.  There can be no assurance that the steps taken
by  the   Company  to  protect   its   proprietary   technology   will   prevent
misappropriation  of such  technology,  and such  protections  may not  preclude
competitors from developing  products with  functionality or features similar to
or superior to the Company's  products.  A  substantial  amount of the Company's
sales are in international  markets,  and the laws of other countries may afford
the Company little or no effective protection of its intellectual property.

                                       21

<PAGE>

     While the Company believes that its products and trademarks do not infringe
upon the proprietary rights of third parties, there can be no assurance that the
Company will not receive future communications from third parties asserting that
the Company's products infringe,  or may infringe,  on the proprietary rights of
third  parties.  The  Company was denied a  trademark  registration  of the name
"Interlink" based on the use of similar names by other companies in the computer
industry.   The  Company  expects  that  software  product  developers  will  be
increasingly  subject  to  infringement  claims as the  number of  products  and
competitors in the Company's  industry segments grow and the  functionalities of
products in  different  industry  segments  overlap.  Any such  claims,  with or
without  merit,  could  be time  consuming,  result  in  costly  litigation  and
diversion of technical and management  personnel,  cause product shipment delays
or  require  the  Company  to develop  non-infringing  technology  or enter into
royalty or  licensing  agreements,  any of which  could have a material  adverse
effect on the Company's business, financial condition and results of operations.
Such royalty or licensing agreements, if required, may not be available on terms
acceptable  to the  Company  or at all.  In the event of a  successful  claim of
product infringement against the Company and failure or inability of the Company
to  develop  non-infringing  technology  or  license  the  infringed  or similar
technology,   the  Company's  business,   financial  condition  and  results  of
operations could be materially adversely affected. In addition,  the Company may
initiate  claims or litigation  against third  parties for  infringement  of the
Company's  proprietary  rights or to  establish  the  validity of the  Company's
proprietary  rights.  Any such claims could be time consuming,  result in costly
litigation,  or lead the Company to enter into royalty or  licensing  agreements
rather than litigating such claims on their merits. Moreover, an adverse outcome
in litigation or similar  adversarial  proceedings  could subject the Company to
significant  liabilities  to third parties,  require  expenditure of significant
resources to develop  non-infringing  technology,  require disputed rights to be
licensed  from others or require the  Company to cease the  marketing  or use of
certain  products,  any of which  could  have a material  adverse  effect on the
Company's business, financial condition and results of operations.

Product Errors; Product Liability

     Software  products as complex as those offered by the Company often contain
undetected  errors or failures  when first  introduced  or as new  versions  are
released.  Testing of the Company's products is particularly challenging because
it is difficult to simulate the wide variety of computing  environments in which
the Company's  customers may deploy its products.  Accordingly,  there can be no
assurance  that,  despite  testing by the Company  and by current and  potential
customers,  errors will not be found after commencement of commercial shipments,
resulting in lost revenues,  loss of or delay in market  acceptance and negative
publicity about the Company and its products, any of which could have a material
adverse  effect on the Company's  business,  financial  condition and results of
operations.

     The  Company's   license   agreements  with  customers   typically  contain
provisions  designed  to limit  the  Company's  exposure  to  potential  product
liability  claims.  The  limitation  of liability  provisions  contained in such
license  agreements may not be effective  under the laws of some  jurisdictions,
particularly  if the Company in the future relies on "shrink wrap" licenses that
are not signed by licensees. The Company's products are generally used to manage
data  critical  to  organizations,  and as a  result,  the sale and  support  of
products  by the  Company  may entail the risk of product  liability  claims.  A
successful  liability  claim  brought  against the Company could have a material
adverse  effect on the Company's  business,  financial  condition and results of
operations.

                                       22

<PAGE>


Reliance on TCP/IP and Maintenance; Concentration of Product Sales

     During the three  months  ended  December  31, 1996 and 1995,  sales of the
TCPaccess   products,   excluding   maintenance  and  hardware,   accounted  for
approximately  39% and 46%, and,  including  related  maintenance  and hardware,
accounted for  approximately 64% and 76%,  respectively,  of the Company's total
revenues. Accordingly, the Company's operating results, particularly in the near
term, are  significantly  dependent upon the continued market  acceptance of the
TCPaccess  products.  A portion of the maintenance  revenues are from historical
customers  of the  Company's  DECnet  product.  The  Company no longer  actively
markets the DECnet product,  and maintenance revenues from DECnet customers have
declined  each year since the fiscal year ended June 30, 1993,  and are expected
to continue to decline.  The life cycles of the Company's products are difficult
to  estimate  due in part to the  effect  of  future  product  enhancements  and
competition.  A decline in the demand for the Company's  products as a result of
competition, technological change or other factors would have a material adverse
effect on the Company's business, financial condition and results of operations.

     The Company  estimates  that the total number of potential  sites where its
TCPaccess  products  could be  installed  is  limited.  Many of those sites have
already been serviced by either IBM or the Company.  The Company expects that it
will continue to depend upon this limited number of prospective  customers for a
significant  portion  of its  revenues  in future  periods.  As a result of this
concentration,  the  Company's  business,  financial  condition  and  results of
operations could be materially  adversely affected by the failure of anticipated
orders to materialize and by deferrals or cancellations of orders as a result of
changes in customer  requirements.  In addition,  the Company's  future  success
depends upon the capital  spending  patterns of such customers and the continued
demand by such  customers for the Company's  products.  The Company's  operating
results   may  in  the  future  be  subject  to   substantial   period-to-period
fluctuations  as a  consequence  of such  concentration  and  factors  affecting
capital spending in the enterprise networked systems management market.

Dependence on Key Personnel

     The Company is highly  dependent  on the  continued  service of, and on its
ability to  attract  and  retain,  qualified  technical,  sales,  marketing  and
managerial personnel. While the Company intends to expand its field sales force,
experienced  field sales personnel in the Company's  industry are in high demand
and may not be  attracted  and  retained on terms  advantageous  to the Company.
Furthermore,  there can be no assurance that the Company's efforts to expand its
field sales force will be successful. The competition for qualified personnel in
the software industry is intense,  and the loss of any such persons,  as well as
the failure to recruit additional key personnel in a timely manner, could have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of  operations.  There can be no assurance that the Company will be able
to continue  to attract and retain the  qualified  personnel  necessary  for the
development of its business.  The Company has employment agreements with certain
executive officers, but such agreements do not ensure their continued service to
the  Company  or  prevent  their   competition  with  the  Company  following  a
termination of employment.  The Company does not maintain key man life insurance
on the lives of its key employees.

Possible Volatility of Share Price

     There can be no  assurance  that the market price of the  Company's  Common
Stock will not decline  below the initial  public  offering  price.  The trading
prices of the  Company's  Common  Stock may be subject to wide  fluctuations  in
response to a number of factors,  including  variations  in  operating  results,
alliances,  changes in

                                       23
<PAGE>

earnings estimates by securities analysts, announcements of extraordinary events
such as litigation,  alliances, or acquisitions,  announcements of technological
innovations or new products or new contracts by the Company or its  competitors,
announcements  and reports  about the  declining  number of mainframe  computers
shipped,  press  releases  or  reports of IBM or other  competitors  introducing
competitive or substitute products,  as well as general economic,  political and
market  conditions.   In  addition,  the  stock  market  has  from  time-to-time
experienced  significant  price and volume  fluctuations  that have particularly
affected the market  prices for the common  stocks of  technology  companies and
that have  often been  unrelated  to the  operating  performance  of  particular
companies.  These broad market fluctuations may also adversely affect the market
price  of  the  Company's  Common  Stock.  In the  past,  following  periods  of
volatility  in the market  price of a  company's  securities,  securities  class
action  litigation  has occurred  against the issuing  company.  There can be no
assurance that such  litigation will not occur in the future with respect to the
Company.  Such litigation  could result in substantial  costs and a diversion of
management's attention and resources, which could have a material adverse effect
on the Company's business,  financial  condition and results of operations.  Any
adverse  determination  in such  litigation  could also  subject  the Company to
significant liabilities.

                                       24

<PAGE>









                           PART II: OTHER INFORMATION


                                       25
<PAGE>


ITEM 2.    Changes in Securities

           On December 12, 1996,  the Company sold 622,000  shares of its Common
           Stock to Cisco for an aggregate  purchase price of approximately $6.8
           million.  The sale of the shares of Common  Stock to Cisco was deemed
           to be exempt from  registration  under the Securities Act in reliance
           upon Section 4(2) of the Securities Act as a transaction by an issuer
           not involving a public offering.  Cisco  represented its intention to
           acquire the securities for investment  only and not with a view to or
           for  sale  in  connection  with  any  distribution   thereof  and  an
           appropriate legend was affixed to the share certificate issued in the
           transaction. Cisco had adequate public information about the Company.

ITEM 6.    Exhibits and Reports on Form 8-K

           (a)      Exhibit 10.3           1996   Director  Stock  Option  Plan,
                                           as  amended, and  form  of  agreement
                                           thereto

           (b)      Exhibit 10.20          Stock purchase agreement between  the
                                           Company and Cisco dated  December 12,
                                           1996

           (c)      Exhibit 11.1           Statement  Regarding  Computation  of
                                           Net Income (Loss) Per Share

           (d)      Exhibit 27             Financia Data Schedule (EDGAR version
                                           only)

           (e)      Reports on Form 8-K    The  Company filed  a current  report
                                           on Form 8-K  on  December 16, 1996.


                                       26
<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.

Date: February 12, 1997              INTERLINK COMPUTER SCIENCES INC.
                                     AND SUBSIDIARIES
                                     (Registrant)



                                     By:  /s/Gloria M. Purdy
                                         ---------------------------------------
                                          Gloria M. Purdy
                                          Chief Financial Officer and Secretary


                                       27




                                                                    EXHIBIT 10.3


                       INTERLINK COMPUTER SCIENCES, INC.

                            1996 DIRECTOR OPTION PLAN


         1. Purposes of the Plan. The purposes of this 1996 Director Option Plan
are to attract and retain the best  available  personnel  for service as Outside
Directors (as defined herein) of the Company, to provide additional incentive to
the Outside  Directors  of the Company to serve as  Directors,  and to encourage
their continued service on the Board.

            All options granted hereunder shall be nonstatutory stock options.

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

            (a) "Board" means the Board of Directors of the Company.

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

            (c) "Common Stock" means the Common Stock of the Company.

            (d) "Company" means Interlink Computer Sciences,  Inc., a California
corporation.

            (e) "Director" means a member of the Board.

            (f) "Employee" means any person,  including  officers and Directors,
employed by the Company or any Parent or Subsidiary of the Company.  The payment
of a Director's  fee by the Company  shall not be sufficient in and of itself to
constitute "employment" by the Company.

            (g)  "Exchange  Act" means the  Securities  Exchange Act of 1934, as
amended.

            (h) "Fair Market Value" means,  as of any date,  the value of Common
Stock determined as follows:

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

                           (ii) If the  Common  Stock is  regularly  quoted by a
recognized  securities  dealer but  selling  prices are not  reported,  the Fair
Market  Value of a Share of Common  Stock shall be the mean between the high bid
and low asked  prices  for the  Common  Stock on the date of  determination,  as
reported  in The Wall  Street  Journal or such other  source as the Board  deems
reliable, or;


<PAGE>

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

            (i) "Inside Director" means a Director who is an Employee.

            (j) "Option" means a stock option granted pursuant to the Plan.

            (k) "Optioned Stock" means the Common Stock subject to an Option.

            (l) "Optionee" means a Director who holds an Option.

            (m) "Outside Director" means a Director who is not an Employee.

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

            (o) "Plan" means this 1996 Director Option Plan.

            (p)  "Share"  means a share of the  Common  Stock,  as  adjusted  in
accordance with Section 10 of the Plan.

            (q) "Subsidiary"  means a "subsidiary  corporation,"  whether now or
hereafter existing, as defined in Section 424(f) of the Internal Revenue Code of
1986.

         3. Stock Subject to the Plan.  Subject to the  provisions of Section 10
of the Plan,  the maximum  aggregate  number of Shares which may be optioned and
sold under the Plan is 150,000  Shares of Common Stock (the "Pool").  The Shares
may be authorized, but unissued, or reacquired Common Stock.

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

         4. Administration and Grants of Options under the Plan.

            (a) Procedure for Grants.  The  provisions set forth in this Section
4(a) shall not be amended more than once every six months, other than to comport
with changes in the Code, the Employee  Retirement  Income Security Act of 1974,
as amended, or the rules thereunder.  All grants of Options to Outside Directors
under  this  Plan  shall be  automatic  and  nondiscretionary  and shall be made
strictly in accordance with the following provisions:


                                       -2-
<PAGE>

                           (i) No person  shall  have any  discretion  to select
which Outside  Directors  shall be granted Options or to determine the number of
Shares to be covered by Options granted to Outside Directors.

                           (ii) Each  Outside  Director  shall be  automatically
granted an Option to purchase  15,000 Shares (the "First Option") on the date on
which the later of the following  events occurs:  (A) the effective date of this
Plan,  as determined  in  accordance  with Section 6 hereof,  or (B) the date on
which such person first becomes an Outside Director, whether through election by
the  shareholders  of the Company or appointment by the Board to fill a vacancy;
provided,  however,  that an Inside Director who ceases to be an Inside Director
but who remains a Director shall not receive a First Option.

                           (iii) Each Outside  Director  shall be  automatically
granted an Option to purchase 3,750 Shares (a  "Subsequent  Option") on the date
of his or her  re-election to the Board each year, if as of such date, he or she
shall have served on the Board for at least the preceding six (6) months.

                           (iv)  Notwithstanding  the  provisions of subsections
(ii) and (iii) hereof,  any exercise of an Option granted before the Company has
obtained  shareholder  approval of the Plan in accordance with Section 16 hereof
shall be conditioned  upon obtaining  such  shareholder  approval of the Plan in
accordance with Section 16 hereof.

                           (v) The  terms of a First  Option  granted  hereunder
shall be as follows:

                                    (A) the term of the  First  Option  shall be
ten (10) years.

                                    (B) the First  Option  shall be  exercisable
only while the Outside Director remains a Director of the Company, except as set
forth in Sections 8 and 10 hereof.

                                    (C) the  exercise  price per Share  shall be
100% of the Fair  Market  Value  per  Share  on the  date of grant of the  First
Option. In the event that the date of grant of the First Option is not a trading
day,  the  exercise  price per Share shall be the Fair Market  Value on the next
trading day immediately following the date of grant of the First Option.

                                    (D) subject to Section 10 hereof,  the First
Option shall become  exercisable as to 1/48th of the Shares subject to the First
Option each month after its date of grant,  provided that the Optionee continues
to serve as a Director on such dates.

                           (vi)  The  terms  of  a  Subsequent   Option  granted
hereunder shall be as follows:

                                    (A) the term of the Subsequent  Option shall
be ten (10) years.

                                       -3-
<PAGE>

                                    (B)   the   Subsequent   Option   shall   be
exercisable  only while the Outside  Director remains a Director of the Company,
except as set forth in Sections 8 and 10 hereof.

                                    (C) the  exercise  price per Share  shall be
100% of the Fair Market  Value per Share on the date of grant of the  Subsequent
Option.  In the event that the date of grant of the  Subsequent  Option is not a
trading day, the exercise  price per Share shall be the Fair Market Value on the
next  trading  day  immediately  following  the date of grant of the  Subsequent
Option.

                                    (D)  subject  to  Section  10  hereof,   the
Subsequent  Option shall become  exercisable as to 100% of the Shares subject to
the Subsequent Option on the fourth  anniversary of its date of grant,  provided
that the Optionee continues to serve as a Director on such dates.

                           (vii) In the event that any Option  granted under the
Plan would cause the number of Shares  subject to  outstanding  Options plus the
number of Shares previously purchased under Options to exceed the Pool, then the
remaining  Shares  available  for Option grant shall be granted under Options to
the Outside Directors on a pro rata basis. No further grants shall be made until
such time,  if any, as additional  Shares  become  available for grant under the
Plan through action of the Board or the  shareholders  to increase the number of
Shares which may be issued under the Plan or through  cancellation or expiration
of Options previously granted hereunder.

         5. Eligibility.  Options may be granted only to Outside Directors.  All
Options shall be automatically granted in accordance with the terms set forth in
Section 4 hereof.

            The Plan shall not confer upon any  Optionee  any right with respect
to  continuation  of service as a Director or nomination to serve as a Director,
nor shall it  interfere  in any way with any rights  which the  Director  or the
Company may have to terminate the  Director's  relationship  with the Company at
any time.

         6. Term of Plan.  The Plan shall become  effective  upon the earlier to
occur of its  adoption by the Board or its approval by the  shareholders  of the
Company as described in Section 16 of the Plan. It shall  continue in effect for
a term of ten (10) years unless sooner terminated under Section 11 of the Plan.

         7. Form of  Consideration.  The consideration to be paid for the Shares
to be issued upon exercise of an Option,  including the method of payment, shall
consist of (i) cash,  (ii) check,  (iii) other  shares  which (x) in the case of
Shares acquired upon exercise of an Option,  have been owned by the Optionee for
more than six (6) months on the date of  surrender,  and (y) have a Fair  Market
Value on the date of  surrender  equal to the  aggregate  exercise  price of the
Shares as to which said Option shall be  exercised,  (iv) delivery of a properly
executed  exercise notice together with such other  documentation as the Company
and the broker, if applicable, shall require to effect an exercise of the Option
and  delivery  to the Company of the sale or loan  proceeds  required to pay the
exercise price, or (v) any combination of the foregoing methods of payment.


                                       -4-
<PAGE>
         8. Exercise of Option.

            (a)  Procedure  for Exercise;  Rights as a  Shareholder.  Any Option
granted hereunder shall be exercisable at such times as are set forth in Section
4  hereof;  provided,  however,  that no  Options  shall  be  exercisable  until
shareholder  approval of the Plan in accordance  with Section 16 hereof has been
obtained.

            An Option may not be exercised for a fraction of a Share.

            An Option  shall be deemed to be exercised  when  written  notice of
such exercise has been given to the Company in accordance  with the terms of the
Option by the person  entitled to exercise  the Option and full  payment for the
Shares with  respect to which the Option is exercised  has been  received by the
Company.  Full  payment may consist of any  consideration  and method of payment
allowable  under Section 7 of the Plan.  Until the issuance (as evidenced by the
appropriate  entry on the books of the Company or of a duly authorized  transfer
agent of the Company) of the stock certificate  evidencing such Shares, no right
to vote or receive  dividends or any other rights as a  shareholder  shall exist
with respect to the Optioned Stock,  notwithstanding the exercise of the Option.
A share  certificate for the number of Shares so acquired shall be issued to the
Optionee as soon as  practicable  after  exercise of the Option.  No  adjustment
shall be made for a dividend  or other  right for which the record date is prior
to the date the stock certificate is issued, except as provided in Section 10 of
the Plan.

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

            (b) Rule 16b-3.  Options  granted to Outside  Directors  must comply
with the applicable  provisions of Rule 16b-3 promulgated under the Exchange Act
or any  successor  thereto  and shall  contain  such  additional  conditions  or
restrictions  as may be required  thereunder to qualify Plan  transactions,  and
other  transactions  by Outside  Directors that otherwise  could be matched with
Plan  transactions,  for the maximum  exemption  from Section 16 of the Exchange
Act.

            (c)  Termination  of  Continuous  Status as a  Director.  Subject to
Section 10 hereof,  in the event an Optionee's  status as a Director  terminates
(other than upon the  Optionee's  death or total and  permanent  disability  (as
defined in Section 22(e)(3) of the Code)),  the Optionee may exercise his or her
Option, but only within three (3) months following the date of such termination,
and only to the extent that the Optionee was entitled to exercise it on the date
of such  termination  (but in no event later than the expiration of its ten (10)
year term).  To the extent  that the  Optionee  was not  entitled to exercise an
Option on the date of such termination, and to the extent that the Optionee does
not exercise such Option (to the extent  otherwise so entitled)  within the time
specified herein, the Option shall terminate.

            (d)  Disability  of Optionee.  In the event  Optionee's  status as a
Director terminates as a result of total and permanent disability (as defined in
Section 22(e)(3) of the Code), the Optionee

                                       -5-
<PAGE>

may exercise his or her Option, but only within twelve (12) months following the
date of such ter mination, and only to the extent that the Optionee was entitled
to exercise it on the date of such  termination  (but in no event later than the
expiration  of its ten (10) year term).  To the extent that the Optionee was not
entitled to exercise an Option on the date of termination,  or if he or she does
not exercise such Option (to the extent  otherwise so entitled)  within the time
specified herein, the Option shall terminate.

            (e) Death of  Optionee.  In the event of an  Optionee's  death,  the
Optionee's  estate or a person who  acquired the right to exercise the Option by
bequest or  inheritance  may  exercise the Option,  but only within  twelve (12)
months following the date of death, and only to the extent that the Optionee was
entitled  to  exercise  it on the date of death (but in no event  later than the
expiration  of its ten (10) year term).  To the extent that the Optionee was not
entitled to exercise an Option on the date of death,  and to the extent that the
Optionee's  estate or a person who  acquired  the right to exercise  such Option
does not exercise such Option (to the extent  otherwise so entitled)  within the
time specified herein, the Option shall terminate.

         9. Non-Transferability of Options. The Option may not be sold, pledged,
assigned, hypothecated,  transferred, or disposed of in any manner other than by
will or by the laws of descent or distribution and may be exercised,  during the
lifetime of the Optionee, only by the Optionee.

         10. Adjustments Upon Changes in Capitalization,  Dissolution, Merger or
Asset Sale.

            (a) Changes in Capitalization. Subject to any required action by the
shareholders  of the Company,  the number of Shares covered by each  outstanding
Option,  the number of Shares which have been  authorized for issuance under the
Plan but as to which  no  Options  have yet  been  granted  or which  have  been
returned to the Plan upon  cancellation  or expiration of an Option,  as well as
the price per Share covered by each such outstanding  Option,  and the number of
Shares issuable  pursuant to the automatic grant  provisions of Section 4 hereof
shall be proportionately  adjusted for any increase or decrease in the number of
issued Shares resulting from a stock split, reverse stock split, stock dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease  in  the  number  of  issued  Shares   effected   without   receipt  of
consideration  by  the  Company;  provided,  however,  that  conversion  of  any
convertible securities of the Company shall not be deemed to have been "effected
without  receipt of  consideration."  Except as expressly  provided  herein,  no
issuance  by the  Company  of  shares  of  stock  of any  class,  or  securities
convertible into shares of stock of any class,  shall affect,  and no adjustment
by reason  thereof  shall be made with respect to, the number or price of Shares
subject to an Option.

            (b)  Dissolution  or  Liquidation.  In the  event  of  the  proposed
dissolution or liquidation of the Company,  to the extent that an Option has not
been  previously  exercised,   it  shall  terminate  immediately  prior  to  the
consummation of such proposed action.

            (c) Merger or Asset  Sale.  In the event of a merger of the  Company
with or into another  corporation or the sale of substantially all of the assets
of the Company,  outstanding Options may be assumed or equivalent options may be
substituted by the successor corporation or a Parent or

                                       -6-
<PAGE>

Subsidiary  thereof (the  "Successor  Corporation").  If an Option is assumed or
substituted  for,  the  Option  or  equivalent   option  shall  continue  to  be
exercisable  as provided in Section 4 hereof for so long as the Optionee  serves
as a  Director  or a  director  of the  Successor  Corporation.  Following  such
assumption or substitution,  if the Optionee's  status as a Director or director
of the Successor  Corporation,  as applicable,  is terminated  other than upon a
voluntary  resignation by the Optionee,  the Option or option shall become fully
exercisable,  including  as to  Shares  for  which it  would  not  otherwise  be
exercisable.  Thereafter,  the  Option or option  shall  remain  exercisable  in
accordance with Sections 8(c) through (e) above.

         If the Successor  Corporation does not assume an outstanding  Option or
substitute for it an equivalent option, the Option shall become fully vested and
exercisable,  including  as to  Shares  for  which it  would  not  otherwise  be
exercisable.  In such event the Board shall notify the Optionee  that the Option
shall be fully  exercisable  for a period of  thirty  (30) days from the date of
such notice, and upon the expiration of such period the Option shall terminate.

         For the purposes of this Section  10(c),  an Option shall be considered
assumed if, following the merger or sale of assets, the Option confers the right
to purchase or receive,  for each Share of Optioned  Stock subject to the Option
immediately prior to the merger or sale of assets,  the  consideration  (whether
stock,  cash, or other securities or property) received in the merger or sale of
assets by holders of Common Stock for each Share held on the  effective  date of
the transaction (and if holders were offered a choice of consideration, the type
of consideration chosen by the holders of a majority of the outstanding Shares).
If such  consideration  received  in the  merger or sale of assets is not solely
common stock of the successor  corporation or its Parent, the Administrator may,
with the consent of the successor corporation,  provide for the consideration to
be received  upon the exercise of the Option,  for each Share of Optioned  Stock
subject to the Option, to be solely common stock of the successor corporation or
its Parent equal in fair market value to the per share consideration received by
holders of Common Stock in the merger or sale of assets.

         11. Amendment and Termination of the Plan.

            (a) Amendment and Termination. Except as set forth in Section 4, the
Board may at any time amend,  alter,  suspend,  or discontinue  the Plan, but no
amendment, alteration,  suspension, or discontinuation shall be made which would
impair the rights of any Optionee under any grant theretofore made,  without his
or her consent.  In addition,  to the extent  necessary  and desirable to comply
with  Rule  16b-3  under  the  Exchange  Act (or  any  other  applicable  law or
regulation), the Company shall obtain shareholder approval of any Plan amendment
in such a manner and to such a degree as required.

            (b)  Effect of  Amendment  or  Termination.  Any such  amendment  or
termination  of the Plan  shall not  affect  Options  already  granted  and such
Options  shall  remain  in full  force  and  effect as if this Plan had not been
amended or terminated.

         12. Time of Granting Options. The date of grant of an Option shall, for
all purposes, be the date determined in accordance with Section 4 hereof.

                                       -7-
<PAGE>

         13.  Conditions  Upon  Issuance of Shares.  Shares  shall not be issued
pursuant to the exercise of an Option unless the exercise of such Option and the
issuance  and  delivery of such Shares  pursuant  thereto  shall comply with all
relevant provisions of law, including, without limitation, the Securities Act of
1933, as amended, the Exchange Act, the rules and regulations  promulgated there
under,  state  securities  laws, and the requirements of any stock exchange upon
which the  Shares  may then be  listed,  and  shall be  further  subject  to the
approval of counsel for the Company with respect to such compliance.

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

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

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

         15.  Option  Agreement.  Options  shall be evidenced by written  option
agreements in such form as the Board shall approve.

         16. Shareholder  Approval.  Continuance of the Plan shall be subject to
approval  by the  shareholders  of the  Company at or prior to the first  annual
meeting of shareholders  held subsequent to the granting of an Option hereunder.
Such  shareholder  approval shall be obtained in the degree and manner  required
under applicable state and federal law.

                                       -8-


<PAGE>

                        INTERLINK COMPUTER SCIENCES, INC.

                            DIRECTOR OPTION AGREEMENT


         Interlink  Computer  Sciences,  Inc.,  a  California  corporation  (the
"Company"),   has   granted   to   ______________________________________   (the
"Optionee"),  a (X one) a [ ] First Option or a [ ] Subsequent  Option option to
purchase  a total of  __________________  (_________)  shares  of the  Company's
Common Stock (the "Optioned Stock"), at the price determined as provided herein,
and in all respects  subject to the terms,  definitions  and  provisions  of the
Company's 1996 Director Option Plan (the "Plan") adopted by the Company which is
incorporated  herein by reference.  The terms defined in the Plan shall have the
same defined meanings herein.

      1. Nature of the Option.  This Option is a nonstatutory  option and is not
intended to qualify for any special tax benefits to the Optionee.

      2. Exercise Price. The exercise price is $_______ for each share of Common
Stock.

      3. Exercise of Option. This Option shall be exercisable during its term in
accordance with the provisions of Section 8 of the Plan as follows:

         (i) Right to Exercise.

                  (a) First Option.  If this Option is a First Option,  it shall
become exercisable in installments cumulatively as to 1/48 of the Optioned Stock
each month after the date of grant,  so that the Option shall be  exercisable as
to one hundred percent (100%) of the Optioned Stock four years after the date of
grant.

                  (b) Subsequent  Option. If this Option is a Subsequent Option,
it shall become exercisable in full four years after its date of grant.

                  (c)  Notwithstanding  the  provisions  of  Section  3(i)(a) or
3(i)(b),  in no event  shall this  Option be  exercisable  prior to the date the
shareholders of the Company approve the Plan.

                  (d) This  Option  may not be  exercised  for a  fraction  of a
share.

                  (e) In the  event of  Optionee's  death,  disability  or other
termination  of  service  as a  Director,  the  exercisability  of the Option is
governed by Section 8 of the Plan.

         (ii) Method of Exercise.  This Option shall be  exercisable  by written
notice  which shall state the  election to exercise the Option and the number of
Shares in respect of which the Option is being  exercised.  Such written notice,
in the form attached hereto as Exhibit A, shall be signed by the


                                       -1-
<PAGE>

Optionee and shall be delivered in person or by certified  mail to the Secretary
of the  Company.  The  written  notice  shall be  accompanied  by payment of the
exercise price.

      4. Method of Payment. Payment of the exercise price shall be by any of the
following, or a combination thereof, at the election of the Optionee:

           (i)     cash;

          (ii)     check;

         (iii)  surrender  of  other  shares  which  (x) in the  case of  Shares
acquired  upon  exercise of an Option,  have been owned by the Optionee for more
than six (6) months on the date of  surrender,  and (y) have a Fair Market Value
on the date of surrender equal to the aggregate  exercise price of the Shares as
to which said Option shall be exercised; or

          (iv) delivery of a properly  executed  exercise  notice  together with
such other  documentation  as the Company and the broker,  if applicable,  shall
require to effect an exercise  of the Option and  delivery to the Company of the
sale or loan proceeds required to pay the exercise price.

      5.  Restrictions  on  Exercise.  This Option may not be  exercised  if the
issuance  of such  Shares  upon  such  exercise  or the  method  of  payment  of
consideration  for such shares would  constitute  a violation of any  applicable
federal or state  securities  or other law or  regulations,  or if such issuance
would not comply  with the  requirements  of any stock  exchange  upon which the
Shares may then be listed.  As a condition to the  exercise of this Option,  the
Company may  require  Optionee to make any  representation  and  warranty to the
Company as may be required by any applicable law or regulation.

      6.  Non-Transferability  of Option.  This Option may not be transferred in
any manner  otherwise than by will or by the laws of descent or distribution and
may be exercised during the lifetime of Optionee only by the Optionee. The terms
of this  Option  shall be binding  upon the  executors,  administrators,  heirs,
successors and assigns of the Optionee.

      7. Term of Option.  This  Option may not be  exercised  more than ten (10)
years from the date of grant of this Option,  and may be  exercised  during such
period only in accordance with the Plan and the terms of this Option.

      8. Taxation  Upon  Exercise of Option.  Optionee  understands  that,  upon
exercise of this Option,  he or she will recognize income for tax purposes in an
amount equal to the excess of the then Fair Market Value of the Shares purchased
over the exercise  price paid for such Shares.  Since the Optionee is subject to
Section 16(b) of the Securities Exchange Act of 1934, as amended,  under certain
limited  circumstances  the  measurement  and  timing  of such  income  (and the
commencement  of any  capital  gain  holding  period) may be  deferred,  and the
Optionee  is advised to contact a tax  advisor  concerning  the  application  of
Section  83 in  general  and  the  availability  a  Section  83(b)  election  in
particular in connection with the exercise of the Option.  Upon a resale of such
Shares by the


                                       -2-
<PAGE>
Optionee, any difference between the sale price and the Fair Market Value of the
Shares on the date of  exercise  of the  Option,  to the extent not  included in
income as described above, will be treated as capital gain or loss.

DATE OF GRANT:  ______________      INTERLINK COMPUTER SCIENCES, INC.
                                    a California corporation



                                    By: ________________________________________


      Optionee  acknowledges  receipt of a copy of the Plan,  a copy of which is
attached  hereto,  and represents  that he or she is familiar with the terms and
provisions  thereof,  and hereby accepts this Option subject to all of the terms
and provisions thereof. Optionee hereby agrees to accept as binding,  conclusive
and final all  decisions  or  interpretations  of the Board  upon any  questions
arising under the Plan.


      Dated: _________________      ____________________________________________
                                    Optionee





                                       -3-

<PAGE>

                                    EXHIBIT A

                         DIRECTOR OPTION EXERCISE NOTICE



Interlink Computer Sciences, Inc.
47370 Fremont Blvd.
Fremont,  CA 94538

Attention:  Corporate Secretary


      1.  Exercise of Option.  The  undersigned  ("Optionee")  hereby  elects to
exercise  Optionee's  option to purchase  ______ shares of the Common Stock (the
"Shares")  of  Interlink  Computer  Sciences,  Inc.  (the  "Company")  under and
pursuant to the  Company's  1996  Director  Option Plan and the Director  Option
Agreement dated _______________ (the "Agreement").

      2.  Representations of Optionee.  Optionee  acknowledges that Optionee has
received, read and understood the Agreement.

      3. Federal Restrictions on Transfer.  Optionee understands that the Shares
must be held indefinitely unless they are registered under the Securities Act of
1933, as amended (the "1933 Act"), or unless an exemption from such registration
is available,  and that the  certificate(s)  representing  the Shares may bear a
legend  to that  effect.  Optionee  understands  that  the  Company  is under no
obligation  to register the Shares and that an exemption may not be available or
may not  permit  Optionee  to  transfer  Shares in the  amounts  or at the times
proposed by Optionee.

      4. Tax Consequences. Optionee understands that Optionee may suffer adverse
tax  consequences  as a result of  Optionee's  purchase  or  disposition  of the
Shares.   Optionee   represents   that  Optionee  has  consulted  with  any  tax
consultant(s)  Optionee  deems  advisable  in  connection  with the  purchase or
disposition  of the Shares and that  Optionee  is not relying on the Company for
any tax advice.

      5.  Delivery of  Payment.  Optionee  herewith  delivers to the Company the
aggregate  purchase  price for the Shares that  Optionee has elected to purchase
and has made provision for the payment of any federal or state withholding taxes
required to be paid or withheld by the Company.

      6. Entire  Agreement.  The Agreement is incorporated  herein by reference.
This Exercise  Notice and the Agreement  constitute the entire  agreement of the
parties and supersede in their entirety all prior undertakings and agreements of
the Company and Optionee with respect to the

<PAGE>
subject  matter hereof.  This Exercise  Notice and the Agreement are governed by
California law except for that body of law pertaining to conflict of laws.

Submitted by:                         Accepted by:

OPTIONEE:                             INTERLINK COMPUTER SCIENCES, INC.


_________________________________     By: ___________________________________

                                      Its: __________________________________

Address:




Dated: __________________________     Dated: ________________________________



                                       -2-


                                                                   EXHIBIT 10.20

                             ----------------------
                            STOCK PURCHASE AGREEMENT

                                December 12, 1996
                             ----------------------




<PAGE>

                                TABLE OF CONTENTS

                                                                          Page
                                                                          ----

1.       Purchase and Sale of Stock........................................  1
         1.1      Closing..................................................  1
         1.2      Delivery.................................................  1

2.       Representations and Warranties of the Company.....................  1
         2.1      Authority................................................  1
         2.2      Organization, Good Standing and Qualification............  2
         2.3      Capitalization and Voting Rights.........................  3
         2.4      Subsidiaries.............................................  3
         2.5      Valid Issuance of Common Stock...........................  3
         2.6      Governmental Consents....................................  4
         2.7      Offering.................................................  4
         2.8      Litigation...............................................  4
         2.9      Intellectual Property....................................  4
         2.10     Conflicts................................................  5
         2.11     Compliance with Other Instruments........................  5
         2.12     Disclosure...............................................  6
         2.13     Registration Rights......................................  6
         2.14     Title to Property and Assets.............................  6
         2.15     Financial Statements.....................................  6
         2.16     Changes..................................................  6
         2.17     SEC Documents; Material Contracts........................  7
         2.18     Compliance with All Laws.................................  7
         2.19     Investment Company.......................................  8

3.       Representations and Warranties of Investor........................  8
         3.1      Authorization............................................  8
         3.2      Purchase Entirely for Own Account........................  8
         3.3      Governmental Consents....................................  8
         3.4      No Consent...............................................  8
         3.5      Disclosure of Information................................  9
         3.6      Investment Experience....................................  9
         3.7      Accredited Investor......................................  9
         3.8      Restricted Securities....................................  9
         3.9      Further Limitations on Disposition.......................  9
         3.10     Legends.................................................. 10

4.       Right to Notification............................................. 10
         4.1      Notification of Acquisition of Securities................ 10

                                       i.

<PAGE>



         4.2      Notification of Receipt of Acquisition Proposal
                     or Initiation of Sale................................. 10
         4.3      Actual Voting Power...................................... 11

5.       Registration Rights............................................... 11
         5.1      Request for Registration................................. 11
         5.2      Obligations of the Company............................... 12
         5.3      Expenses of Registration................................. 14
         5.4      Indemnification.......................................... 14
         5.5      Limitations on Subsequent Registration Rights............ 16

6.       Right of First Offer.............................................. 17
         6.1      New Issuances............................................ 17
         6.2      "New Securities"......................................... 17
         6.3      Notice of New Securities................................. 17
         6.4      Exercise of Right of First Offer......................... 18
         6.5      Transferability.......................................... 18
         6.6      Closing.................................................. 18
         6.7      Reservation of Shares.................................... 18
         6.8      Term..................................................... 18

7.       Conditions of Investor's Obligations at Closing................... 18
         7.1      Representations and Warranties........................... 19
         7.2      Performance.............................................. 19
         7.3      Compliance Certificate................................... 19
         7.4      Qualifications........................................... 19
         7.5      Proceedings and Documents................................ 19
         7.6      Opinion of Company Counsel............................... 19

8.       Conditions of the Company's Obligations at Closing................ 19
         8.1      Representations and Warranties........................... 19
         8.2      Payment of Purchase Price................................ 19
         8.3      Qualifications........................................... 20

9.       Investor Notice................................................... 20

10.      Miscellaneous..................................................... 21
         10.1     Survival of Warranties................................... 21
         10.2     Assignment; Successors and Assigns....................... 21
         10.3     Governing Law............................................ 21
         10.4     Counterparts............................................. 21
         10.5     Titles and Subtitles..................................... 22
         10.6     Notices, etc............................................. 22
         10.7     Finder's Fee............................................. 23
         10.8     Expenses................................................. 23

                                       ii.
<PAGE>



10.9     Amendments and Waivers............................................ 23
10.10    Severability...................................................... 23
10.11    Entire Agreement.................................................. 23




                                      iii.

<PAGE>

                            STOCK PURCHASE AGREEMENT


                  THIS STOCK PURCHASE  AGREEMENT (the "Agreement") is made as of
the 12th day of December,  1996, by and among Interlink Computer Sciences, Inc.,
a Delaware  corporation (the "Company"),  and Cisco Systems,  Inc., a California
corporation ("Investor").

                  WHEREAS,  the  Company and  Investor  have agreed to execute a
Binding Letter of Intent contemporaneously with this Agreement;

                  WHEREAS, pursuant to the Binding Letter of Intent, the parties
have  agreed  that  they will  execute  a  Development,  Marketing  and  Support
Agreement  no later than  January 16,  1997,  which will  supersede  the Binding
Letter of Intent; and

                  WHEREAS,  this Agreement  supersedes Section 15 and Section 17
of the Binding Letter of Intent.

                  THE PARTIES HEREBY AGREE AS FOLLOWS:

                  1.  Purchase  and Sale of  Stock.  Subject  to the  terms  and
conditions  of this  Agreement,  Investor  agrees to purchase at the Closing (as
hereinafter defined) and the Company agrees to sell and issue to Investor at the
Closing,  622,000  shares of the  Company's  Common Stock (the  "Shares"),  at a
purchase price of eleven dollars ($11.00) per share (the "Purchase Price").

                  1.1 Closing. The purchase and sale of the Shares shall be held
at the offices of Wilson,  Sonsini,  Goodrich & Rosati, 650 Page Mill Road, Palo
Alto,  California,  on December 12, 1996 at 4:00 p.m., or at such other time and
place upon which the Company  and  Investor  shall  agree  (which time and place
shall be referred to as the "Closing").

                  1.2  Delivery.  At the  Closing,  the  Company  will  issue to
Investor a  certificate  registered in the  Investor's  name,  representing  the
number of Shares  purchased by Investor  against  payment of the Purchase Price.
The Purchase  Price shall be paid to the Company by certified  check  payable to
the Company or by wire transfer.

                  2.  Representations and Warranties of the Company. The Company
hereby represents and warrants to Investor that:

                  2.1  Authority.  The Company has full power and  authority  to
execute  and  deliver  this  Agreement,   and  to  consummate  the  transactions
contemplated by this Agreement. All corporate action on the part of the Company,
its  officers,  directors  and  stockholders  necessary  for the  execution  and
delivery of, and the consummation of the

<PAGE>

transactions   contemplated  by  this  Agreement  and  the  performance  of  all
obligations of the Company under this Agreement has been taken.  This Agreement,
upon  execution  and  delivery by the Company  and  assuming  the due and proper
execution  and  delivery  by  Investor,  constitutes  legal,  valid and  binding
obligations of the Company, enforceable in accordance with its respective terms,
except  as  may  be   limited   by  (i)   applicable   bankruptcy,   insolvency,
reorganization or other laws of general application relating to or affecting the
enforcement of creditors rights  generally,  and (ii) the effect of rules of law
governing the availability of equitable remedies.  The making and performance of
this Agreement by the Company and the  consummation of the  transactions  herein
contemplated will not violate any provisions of the certificate of incorporation
or  bylaws,  or other  organizational  documents,  of the  Company or any of its
subsidiaries,  and will not conflict with, result in the breach or violation of,
or constitute, either by itself or upon notice or the passage of time or both, a
default under any material agreement, mortgage, deed of trust, lease, franchise,
license,  indenture,  permit or other  instrument to which the Company or any of
its  subsidiaries is a party or by which the Company or any of its  subsidiaries
or any of its respective properties may be bound or affected, any statute or any
authorization,  judgment,  decree, order, rule or regulation of any court or any
regulatory body,  administrative agency or other governmental body applicable to
the Company or any of its subsidiaries or any of their respective properties.

                  2.2 Organization, Good Standing and Qualification. The Company
and  each of its  subsidiaries  have  been  duly  incorporated  and are  validly
existing as  corporations  in good standing  under the laws of their  respective
jurisdictions  of  incorporation,  with full power and authority  (corporate and
other) to own and lease their properties and conduct their respective businesses
and all proposed  future  businesses.  With the  exception of Interlink  Iberica
S.A., of which the Company owns 99.8% of the  outstanding  capital  stock;  each
subsidiary  of the Company  only has one class of capital  stock and the Company
owns all of the outstanding  capital stock of its subsidiaries free and clear of
all  claims,  liens,  charges  and  encumbrances;  the  Company  and each of its
subsidiaries  are  in  possession  of  and  operating  in  compliance  with  all
authorizations, licenses, permits, consents, certificates and orders material to
the conduct of their respective  businesses,  all of which are valid and in full
force and effect,  except where the failure of any such authorization,  license,
permit, consent, certificate or order to be valid or in full force, would not in
any single case or when aggregated with all such failures by the Company and all
of its subsidiaries have a material adverse effect upon the Company; the Company
and each of its  subsidiaries  are duly  qualified  to do  business  and in good
standing as foreign  corporations in each jurisdiction in which the ownership or
leasing of properties  or the conduct of their  respective  businesses  requires
such qualification,  except for jurisdictions in which the failure to so qualify
would not have a material  adverse effect upon the Company and its  subsidiaries
taken  as  a  whole;   and  no  proceeding  has  been  instituted  in  any  such
jurisdiction,  revoking,  limiting or curtailing, or seeking to revoke, limit or
curtail, such power and authority or qualification.

                                       2.
<PAGE>

                  2.3  Capitalization  and Voting Rights. The authorized capital
of the Company as of December 3, 1996 consisted of:

                         (i)  Preferred  Stock.  5,000,000  shares of  Preferred
Stock,  $0.001 par value (the "Preferred  Stock"),  none of which are issued and
outstanding.

                         (ii) Common Stock.  25,000,000  shares of common stock,
$0.001 par value  ("Common  Stock"),  of which  6,388,789  shares are issued and
outstanding.

                         (iii)  Other  than  2,105,000  shares of  Common  Stock
reserved for issuance to employees  pursuant to the Company's  1992 Stock Option
Plan (the "Option  Plan"),  of which options to purchase  1,335,310  shares have
been granted,  350,000  shares of Common Stock  reserved for issuance  under the
1996 Employee Stock Purchase Plan (the "Purchase Plan"), of which no shares have
been  issued,  150,000  shares of Common Stock  reserved for issuance  under the
Company's 1996 Director Option Plan (the "Director  Plan"),  of which options to
purchase  15,000  shares have been  granted,  and  warrants to purchase  468,750
shares of Common Stock,  neither the Company nor any subsidiary has  outstanding
any options to purchase,  or any preemptive  rights or other rights to subscribe
for or to purchase,  any  securities  or  obligations  convertible  into, or any
contracts or  commitments  to issue or sell,  shares of its capital stock or any
such options, rights, convertible securities or obligations.  The Company is not
a party or subject to any  agreement or  understanding,  and, to the best of the
Company's knowledge,  there is no agreement or understanding between any persons
and/or  entities,  which  affects  or relates to the voting or giving of written
consents with respect to any security or by a director of the Company.

                         (iv) The issued and outstanding  shares of Common Stock
have been duly authorized and validly issued,  are fully paid and nonassessable,
have been issued in compliance  with all federal and state  securities  laws and
were not issued in  violation  of or subject to any  preemptive  rights or other
rights to  subscribe  for or  purchase  securities.  All issued and  outstanding
shares  of  capital  stock of each  subsidiary  of the  Company  have  been duly
authorized and validly issued and are fully paid and nonassessable.

                  2.4  Subsidiaries.   Other  than  Interlink  France  S.A.R.I.,
Interlink   Deutschland  GmbH,   Interlink   Iberica  S.A.  (Spain),   Interlink
(Switzerland) S.A., Interlink Computer Sciences,  Ltd. (United Kingdom), New Era
Systems Services, Ltd. (Canada), Era Nua Teoranta, Ltd. (Ireland), and Interlink
Computer  Sciences  (Barbados)  Inc.,  the  Company  does not  presently  own or
control,  directly  or  indirectly,  any  interest  in  any  other  corporation,
association,  or  other  business  entity.  Other  than  as  disclosed  in  each
statement,  annual,  quarterly and other  report,  registration  statement  (the
"Company SEC Documents") filed (other than preliminary  material) by the Company
with the U.S. Securities and Exchange Commission (the "SEC"), the Company is not
a participant in any joint venture, partnership or similar arrangement.

                                       3.
<PAGE>
                  2.5 Valid  Issuance of Common  Stock.  The Common  Stock to be
sold by the Company has been duly  authorized  and,  when issued,  delivered and
paid for in the manner  set forth in this  Agreement,  will be duly  authorized,
validly issued,  fully paid and nonassessable,  and will be free of restrictions
on transfer other than  restrictions  on transfer under this Agreement and under
applicable  state and federal  securities  laws. No  preemptive  rights or other
rights to subscribe for or purchase  exist with respect to the issuance and sale
of the Common Stock by the Company pursuant to this Agreement.

                  2.6  Governmental  Consents.  Other than  compliance  with the
Securities  Act of 1933,  as  amended  (the  "Act")  and such  filings as may be
required to be made with the National  Association  of  Securities  Dealers (the
"NASD"),  no consent,  approval,  order or  authorization  of, or  registration,
qualification,  designation,  declaration or filing with, any federal,  state or
local  governmental  authority  on  the  part  of the  Company  is  required  in
connection  with  the  consummation  of the  transactions  contemplated  by this
Agreement.

                  2.7  Offering.  Subject in part to the truth and  accuracy  of
Investor's  representations set forth in Section 3 of this Agreement, the offer,
sale and  issuance of the Common Stock as  contemplated  by this  Agreement  are
exempt from the  registration  requirements  of the Act, and neither the Company
nor any  authorized  agent  acting on its behalf will take any action  hereafter
that would cause the loss of such exemption.

                  2.8  Litigation.  Other than as  disclosed  in the Company SEC
Documents,  there are no legal or  governmental  actions,  suits or  proceedings
pending or, to the Company's  knowledge,  threatened to which the Company or any
of its subsidiaries is or may be a party or of which property owned or leased by
the Company or any of its  subsidiaries is or may be the subject,  or related to
environmental or  discrimination  matters,  which actions,  suits or proceedings
might,  individually  or in the  aggregate,  prevent  or  adversely  affect  the
transactions  contemplated  by this  Agreement  or result in a material  adverse
change in the  condition  (financial  or  otherwise),  properties,  business  or
results of operations of the Company and its subsidiaries  taken as a whole; and
no labor  disturbance by the employees of the Company or any of its subsidiaries
exists or, to the Company's  knowledge,  is imminent  which might be expected to
have a  material  adverse  effect on such  condition,  properties,  business  or
results of  operations.  Neither the Company  nor any of its  subsidiaries  is a
party or subject to the provisions of any material injunction,  judgment, decree
or  order  of  any  court,  regulatory  body,  administrative  agency  or  other
governmental body. There are no material legal or governmental actions, suits or
proceedings  pending  or, to the  Company's  knowledge,  threatened  against any
executive officers or directors of the Company.

                  2.9  Intellectual  Property.  Other than as  disclosed  in the
Company SEC  Documents,  the Company has  sufficient  title and ownership of all
patents,  trademarks,  service marks,  trade names,  copyrights,  trade secrets,
information,  proprietary rights and processes necessary for its business as now
conducted without any conflict with or

                                       4.
<PAGE>

infringement of the rights of others. Other than as disclosed in the Company SEC
Documents, there are no outstanding options, licenses, or agreements of any kind
relating  to the  foregoing,  nor is the  Company  bound  by or a  party  to any
options,  licenses  or  agreements  of any kind  with  respect  to the  patents,
trademarks,  service marks, trade names,  copyrights,  trade secrets,  licenses,
information, proprietary rights and processes of any other person or entity. The
Company  has not  received  any  communications  alleging  that the  Company has
violated or, by  conducting  its business as proposed,  would violate any of the
patents, trademarks,  service marks, trade names, copyrights or trade secrets or
other proprietary rights of any other person or entity. The Company is not aware
that any of its employees is obligated under any contract  (including  licenses,
covenants or  commitments of any nature) or other  agreement,  or subject to any
judgment,  decree or order of any court or  administrative  agency,  that  would
interfere  with the use of his or her best  efforts to promote the  interests of
the Company or that would conflict with the Company's business as proposed to be
conducted.  Neither  the  execution  nor  delivery  of this  Agreement,  nor the
carrying on of the Company's  business by the employees of the Company,  nor the
conduct  of the  Company's  business  as  proposed,  will,  to the  best  of the
Company's  knowledge,  conflict  with  or  result  in a  breach  of  the  terms,
conditions  or  provisions  of, or  constitute a default  under,  any  contract,
covenant or instrument  under which any of such employees is now obligated.  The
Company does not believe it is or will be necessary to utilize any inventions of
any of its  employees  (or  people it  currently  intends to hire) made prior to
their employment by the Company.

                  2.10  Conflicts.  Neither the  execution  nor delivery of this
Agreement,  nor the carrying on of the Company's  business  will, to the best of
the Company's  knowledge,  conflict  with or result in a material  breach of the
terms,  conditions or provisions of, or constitute a material default under, any
contract, covenant or instrument under which the Company or any of its employees
is now obligated.

                  2.11 Compliance with Other Instruments.  Except as to defaults
which  individually or in the aggregate would not be material to the Company and
its  subsidiaries  taken  as a  whole,  neither  the  Company  nor  any  of  its
subsidiaries  is in violation or default of any provision of its  certificate of
incorporation or bylaws, or other organizational  documents,  or is in breach of
or default with respect to any  provision of any  agreement,  judgment,  decree,
order, mortgage, deed of trust, lease, franchise,  license, indenture, permit or
other  instrument to which it is a party or by which it or any of its properties
are bound;  and,  except as to defaults which  individually  or in the aggregate
would not be material to the Company and its  subsidiaries  taken as a whole, to
the  Company's  knowledge,  there  does not  exist  any  state  of  facts  which
constitutes  an  event  of  default  on the  part  of the  Company  or any  such
subsidiary as defined in such  documents or which,  with notice or lapse of time
or both, would constitute such an event of default. The execution,  delivery and
performance  of  this  Agreement,  and  the  consummation  of  the  transactions
contemplated hereby and thereby,  will not result in any such violation or be in
conflict with or constitute, with or without the passage of time

                                       5.
<PAGE>


and giving of notice,  either a default  under any such  provision,  instrument,
judgment,  order,  writ,  decree or  contract  or an event  that  results in the
creation of any lien,  charge or  encumbrance  upon any assets of the Company or
the  suspension,  revocation,  impairment,  forfeiture,  or  nonrenewal  of  any
material permit, license,  authorization, or approval applicable to the Company,
its business or operations or any of its assets or properties.

                  2.12 Disclosure.  The Company has fully provided Investor with
all the  information  that such Investor has  requested for deciding  whether to
purchase the Common Stock.  Neither this Agreement,  nor any other statements or
certificates made or delivered in connection  herewith or therewith contains any
untrue  statement of a material fact or omits to state a material fact necessary
to make the statements herein or therein not misleading.

                  2.13 Registration  Rights.  Except for the registration rights
granted  under this  Agreement,  and as disclosed in the Company SEC  Documents,
there  are  no  other  stockholders  of  the  Company  that  have  been  granted
registration rights,  including piggyback rights, and the Company has not agreed
to grant any registration rights, to any person or entity.

                  2.14  Title  to  Property  and  Assets.  The  Company  or  the
applicable  subsidiary has good and  marketable  title to all the properties and
assets subject to no lien, mortgage,  pledge,  charge or encumbrance of any kind
except those which do not adversely  affect the use made and proposed to be made
of such  property  by the  Company  and its  subsidiaries.  The  Company  or the
applicable  subsidiary  holds its  leased  properties  under  valid and  binding
leases,  with such  exceptions as are not materially  significant in relation to
the business of the Company.  The Company owns or leases all such  properties as
are necessary to its operations as now conducted.

                  2.15  Financial  Statements.  The  Company  has  delivered  to
Investor its audited  financial  statements  (balance  sheet and profit and loss
statement,  statement  of  stockholders'  equity and  statement  of cash  flows,
including  notes  thereto)  at June 30, 1996 and for the fiscal year then ended,
and its  unaudited  financial  statements  (balance  sheet and  profit  and loss
statement)  as at and for the  3-month  period  ended  September  30,  1996 (the
audited and unaudited  financial  statements  are  collectively,  the "Financial
Statements").  The  Financial  Statements  of the Company and its  subsidiaries,
present fairly the financial  position of the Company and its  subsidiaries,  as
the case may be, as of the  respective  dates of such  financial  statements and
schedules,  and the results of operations  and changes in financial  position of
the Company and its subsidiaries, as the case may be, for the respective periods
covered  thereby.  Such Financial  Statements,  schedules and related notes have
been prepared in accordance  with United States  generally  accepted  accounting
principles applied on a consistent basis.

                  2.16     Changes.  Since September 30, 1996:

                                       6.
<PAGE>

                  (a) the Company and its  subsidiaries  have not  incurred  any
material liabilities or obligations,  indirect, direct or contingent, or entered
into any material verbal or written  agreement or other transaction which is not
in the ordinary course of business;

                  (b) the Company and its  subsidiaries  have not  sustained any
material loss or  interference  with their  respective  businesses or properties
from fire, flood, windstorm,  accident or other calamity, whether or not covered
by insurance;

                  (c) the  Company  has not paid or declared  any  dividends  or
other  distributions  with respect to its capital  stock and the Company and its
subsidiaries  are not in default in the payment of  principal or interest on any
outstanding debt obligations;

                  (d) There has not been any  change  in the  capital  stock or,
other than in the  ordinary  course of  business,  indebtedness  material to the
Company and its subsidiaries; and

                  (e)  there  has not been any  material  adverse  change or any
development  involving  or  which  may  reasonably  be  expected  to  involve  a
prospective  material adverse change, in the condition (financial or otherwise),
business,  properties, results of operations or prospects of the Company and its
subsidiaries taken as a whole.


                  2.17 SEC Documents;  Material Contracts. The Company has filed
each statement,  annual, quarterly and other report,  registration statement and
definitive  proxy  statement  required  to  be  filed  (other  than  preliminary
material) by the Company with the SEC subsequent to August 15, 1996. As of their
respective  filing  dates,  the Company SEC  Documents  complied in all material
respects with the requirements of the Act or the Securities Exchange Act of 1934
(the "1934  Act"),  as the case may be, and none of the  Company  SEC  Documents
contained any untrue statement of a material fact or omitted to state a material
fact  required to be stated  therein or  necessary to make the  statements  made
therein,  in light of the circumstances in which they were made, not misleading,
except to the extent corrected by any subsequently  filed Company SEC Documents.
The  Company's  Registration  Statement on Form S-1,  which became  effective on
August 14, 1996 (the "Registration  Statement"),  and the Company SEC Documents,
include certain  contracts as required by the SEC's rules and  regulations.  The
contracts  so  described in the  Registration  Statement  and in the Company SEC
Documents,  that are currently material to the Company and its business,  are in
full force and effect on the date  hereof.  Neither  the  Company nor any of its
subsidiaries, nor to the Company's knowledge, any other party is in breach of or
default under any of such contracts, except as to breaches or defaults which, in
any single case or in the aggregate would not have a material  adverse effect on
the Company or the subsidiary.


                                       7.
<PAGE>

                  2.18  Compliance  with  All  Laws.  The  Company  has not been
advised, and has no reason to believe, that either it or any of its subsidiaries
is not conducting  business in compliance  with all applicable  laws,  rules and
regulations of the jurisdictions in which it is conducting business,  including,
without limitation,  all applicable local, state and federal  environmental laws
and  regulations,  except  where  failure  to  be  so in  compliance  would  not
materially  adversely affect the condition  (financial or otherwise),  business,
results of operations or prospects of the Company and its subsidiaries  taken as
a whole.

                  2.19  Investment  Company.  The Company is not an  "investment
company" within the meaning of the Investment Company Act of 1940, as amended.

                  3. Representations and Warranties of Investor. Investor hereby
represents and warrants that:

                  3.1  Authorization.  Investor has full power and  authority to
execute and deliver,  and to consummate  the  transactions  contemplated  by the
Closing and this Agreement.  All corporate  action on the part of Investor,  its
officers,  directors  and  shareholders  necessary  for  (i) the  execution  and
delivery of, and the  consummation  of the  transactions  contemplated  by, this
Agreement,  and (ii) as of the Closing,  the  performance of all  obligations of
Investor under this Agreement,  has been taken.  This Agreement,  upon execution
and delivery by Investor and assuming the due and proper  execution and delivery
by the Company,  constitutes a legal,  valid and binding obligation of Investor,
enforceable  in  accordance  with its  terms,  except as may be  limited  by (i)
applicable  bankruptcy,  insolvency,  reorganization  or other  laws of  general
application  relating  to or  affecting  the  enforcement  of  creditors  rights
generally,  and (ii) the effect of rules of law  governing the  availability  of
equitable remedies.

                  3.2 Purchase Entirely for Own Account.  This Agreement is made
with Investor in reliance upon Investor's  representation to the Company,  which
by Investor's  execution of this Agreement  Investor hereby  confirms,  that the
Common Stock to be received by Investor (collectively, the "Securities") will be
acquired for investment  for Investor's own account,  not as a nominee or agent,
and not with a view to the resale or distribution of any part thereof,  and that
Investor has no present intention of selling,  granting any participation in, or
otherwise  distributing the same. By executing this Agreement,  Investor further
represents that Investor does not have any contract,  undertaking,  agreement or
arrangement with any person to sell,  transfer or grant  participations  to such
person or to any third person, with respect to any of the Securities.

                  3.3 Governmental Consents.  Other than compliance with the Act
and such  filings  as may be  required  to be made  with the NASD,  no  consent,
approval,   order  or   authorization   of,  or   registration,   qualification,
designation,   declaration  or  filing  with,   any  federal,   state  or  local
governmental  authority on the part of Investor is required in  connection  with
the consummation of the transactions contemplated by this Agreement.

                                       8.
<PAGE>

                  3.4 No Consent. No consent,  approval,  waiver or other action
by  any  entity  under  any  material  contract,  agreement,  indenture,  lease,
instrument  or other  document  to which  Investor  is a party or by which it is
bound is required or necessary for the execution,  delivery and  performance of,
or the  consummation  of the  transactions  contemplated  by, this  Agreement by
Investor.

                  3.5  Disclosure  of  Information.  Investor  believes  it  has
received all the information it considers  necessary or appropriate for deciding
whether to purchase the Common Stock.  Investor  further  represents that it has
had an  opportunity  to ask  questions  and  receive  answers  from the  Company
regarding  the terms and  conditions of the offering of the Common Stock and the
business,  properties,  prospects  and financial  condition of the Company.  The
foregoing,  however, does not limit or modify the representations and warranties
of the Company in Section 2 of this  Agreement  or the right of Investor to rely
thereon.

                  3.6  Investment   Experience.   Investor  is  an  investor  in
securities of companies in the  development  stage and  acknowledges  that it is
able to fend for itself,  can bear the economic risk of its investment,  and has
such  knowledge  and  experience  in  financial  or business  matters that it is
capable  of  evaluating  the merits  and risks of the  investment  in the Common
Stock.  Investor has not been  organized for the purpose of acquiring the Common
Stock.

                  3.7 Accredited Investor.  Investor is an "accredited investor"
within the meaning of SEC Rule 501 of Regulation D, as presently in effect.

                  3.8  Restricted  Securities.  Investor  understands  that  the
Securities it is purchasing are  characterized as "restricted  securities" under
the federal securities laws inasmuch as they are being acquired from the Company
in a transaction  not  involving a public  offering and that under such laws and
applicable  regulations such securities may be resold without registration under
the Act, only in certain limited  circumstances.  In this  connection,  Investor
represents  that it is familiar  with SEC Rule 144, as presently in effect,  and
understands the resale limitations imposed thereby and by the Act.

                  3.9 Further  Limitations  on  Disposition.  Without in any way
limiting the  representations  set forth above,  Investor  further agrees not to
make any  disposition of all or any portion of the  Securities  unless and until
the  transferee has agreed in writing for the benefit of the Company to be bound
by this Section 3 provided and to the extent this Section is applicable, and:

                  (a) There is then in effect a Registration Statement under the
Act  covering  such  proposed  disposition  and  such  disposition  is  made  in
accordance with such Registration Statement; or


                                       9.
<PAGE>

                  (b) If  reasonably  requested by the Company,  Investor  shall
have furnished the Company with an opinion of counsel,  reasonably  satisfactory
to the  Company  that such  disposition  will not require  registration  of such
shares under the Act. It is agreed that the Company will not require opinions of
counsel  for   transactions   made  pursuant  to  Rule  144  except  in  unusual
circumstances.

                  3.10 Legends.  Each  certificate  or  instrument  representing
Shares shall bear legends in substantially the following forms:

                         (i) "THE  SECURITIES  REPRESENTED  BY THIS  CERTIFICATE
         HAVE  NOT  BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF  1933  (THE
         'SECURITIES  ACT') AND ARE  'RESTRICTED  SECURITIES' AS DEFINED IN RULE
         144  PROMULGATED  UNDER THE  SECURITIES  ACT. THE SECURITIES MAY NOT BE
         SOLD  OR  OFFERED  FOR  SALE OR  OTHERWISE  DISTRIBUTED  EXCEPT  (I) IN
         CONJUNCTION WITH AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES
         UNDER THE SECURITIES ACT, OR (II) IN COMPLIANCE WITH RULE 144, OR (III)
         PURSUANT TO AN OPINION OF COUNSEL  SATISFACTORY  TO THE ISSUER OF THESE
         SECURITIES  THAT SUCH  REGISTRATION OR COMPLIANCE IS NOT REQUIRED AS TO
         SUCH SALE, OFFER OR DISTRIBUTION."

                        (ii) Any other  legends  required by  California  law or
         other applicable blue sky or state securities laws.

The Company  need not register a transfer of any Shares,  and may also  instruct
its  transfer  agent not to  register  a  transfer  of any  Shares,  unless  the
conditions  specified  in the  foregoing  legends  are  satisfied  to the extent
applicable.

                  4. Right to Notification.

                  4.1  Notification  of Acquisition  of Securities.  The Company
will notify Investor in the event any person or entity acquires securities which
results  in such  person  or entity  owning  five  (5%)  percent  or more of the
securities of the Company or a Spinoff  (defined as a subsidiary of the Company,
to  which  the  Company  transfers  substantially  all of  its  assets  used  in
development  and/or  production  of TCP/IP  products)  promptly when the Company
becomes aware of the  acquisition.  In the event any person or entity varies its
ownership  above five (5%) percent by one (1%) percent or more, then the Company
shall  notify  Investor  immediately  after the  Company  receives a copy of the
applicable  Form 13 or any  other  applicable  form or  earlier  if the  Company
becomes aware of such  acquisition  prior to receiving the applicable form filed
with the SEC.


                                       10.
<PAGE>

                  4.2  Notification  of  Receipt  of  Acquisition   Proposal  or
Initiation  of Sale.  In the event that the Board of Directors of the Company or
the  Spinoff  (i)  receives  an offer to be  acquired  by means of (x) a merger,
consolidation or other business  combination  pursuant to which the stockholders
of the  Company or a Spinoff  immediately  prior to the  effective  date of such
transaction  have  beneficial  ownership of less than fifty percent (50%) of the
total  combined  voting  power  for  election  of  directors  of  the  surviving
corporation  immediately  following such transaction;  or (y) the sale of all or
substantially  all of the assets of the  Company or a Spinoff,  or (ii) votes to
initiate a sale to any other person or entity of (xx) twenty-five  (25%) percent
or more of the Actual  Voting  Power of the  Company  (as defined in Section 4.3
below) or a Spinoff,  or (yy) all or  substantially  all of the  Company's  or a
Spinoff's  assets,  prior to accepting such  acquisition  proposal or initiating
such sale,  the Company or the Spinoff shall provide to Investor  written notice
(the "Notice") of the proposed terms of such acquisition proposal or sale within
two (2) business days of receipt of such acquisition  proposal or the initiation
of a sale of the Company or the Spinoff.  The Notice shall include the following
information:  (a) the identity of the party making the acquisition  proposal and
(b) the specific terms of the  acquisition  proposal or the initiation of a sale
of the Company or the Spinoff.  Further,  the Company  shall  provide a true and
complete copy of the acquisition  proposal if in writing,  or a complete written
summary  thereof if the  proposal is not in writing,  and any and all  documents
containing  or referring to  non-public  information  of the Company that are or
have been  supplied to the party making the  acquisition  proposal.  The Company
agrees not to accept an  acquisition  proposal or vote to initiate a sale of the
Company or the Spinoff as provided  for in this  Section 4.2 earlier than twenty
(20) days from the date of Investor's receipt of the Notice.

                  4.3 Actual Voting Power.  "Actual  Voting Power of the Company
or a  Spinoff"  shall  mean the total  number  of votes  that may be cast in the
election of Directors of the Company or a Spinoff at any meeting of stockholders
of the Company or a Spinoff if all shares of Common  Stock and other  securities
of the  Company or a Spinoff  entitled  to vote  generally  in the  election  of
Directors of the Company or a Spinoff  were  present and voted at such  meeting,
other than  votes  that may be cast only by one class or series of stock  (other
than shares of Common Stock) or upon the happening of a contingency.

                  4.4 Term.  The Notice  requirements  set forth in Section  4.1
shall commence on December 10, 1996 and shall terminate on December 31, 1999.


                                       11.
<PAGE>


                  5. Registration Rights.

                  5.1 Request for Registration.

                  (a) If the Company  shall receive at any time after August 15,
1997, a written  request  from  Investor  that the Company  file a  registration
statement under the Act covering the  registration of the Common Stock purchased
hereunder,  then the Company  shall  effect as soon as  practicable,  and in any
event within 60 days of the receipt of such request,  the registration under the
Act of all securities which Investor requests to be registered.

                  (b) If Investor  intends to distribute the securities  covered
by its request by means of an underwriting, Investor shall so advise the Company
as a part of its request made pursuant to subsection (a) above.  The underwriter
will be selected by the Company and shall be reasonably  acceptable to Investor.
Investor shall (together with the Company) enter into an underwriting  agreement
in  customary  form  with the  underwriter  or  underwriters  selected  for such
underwriting.

                  (c)  Notwithstanding  the  foregoing,  if  the  Company  shall
furnish to Investor a certificate  signed by the Chief Executive  Officer of the
Company stating that in the good faith judgment of the Board of Directors of the
Company,  it would be seriously  detrimental to the Company and its stockholders
for such  registration  statement to be filed and it is  therefore  essential to
defer the filing of such  registration  statement,  the  Company  shall have the
right to defer  taking  action  with  respect to such filing for a period of not
more than 120 days after receipt of the request of Investor;  provided, however,
that the Company may not utilize  this right more than once in any  twelve-month
period.

                  (d) In addition, the Company shall not be obligated to effect,
or to take any action to effect, any registration pursuant to this Section 5.1:

                                (i)  After  the   Company   has   effected   one
registration,  other than a  registration  which is made on Form S-3 pursuant to
this Section 5.1, and such registration has been declared or ordered effective;

                                (ii) If all securities  which Investor  requests
to be  registered  may  immediately  be sold  under  Rule 144  during any 90-day
period.

                                (iii) More than once in any 12-month period.

                  5.2 Obligations of the Company.  Whenever  required under this
Section 5 to effect the  registration of any  securities,  the Company shall, as
expeditiously as reasonably possible:


                                       12.
<PAGE>

                  (a)  Prepare  and file with the SEC a  registration  statement
with respect to such securities and use commercially reasonable efforts to cause
such  registration  statement  to become  effective,  and,  upon the  request of
Investor,  keep such registration  statement effective for a period of up to one
hundred  twenty  (120)  days  or  until  the  distribution  contemplated  in the
Registration Statement has been completed;  provided, however, that such 120-day
period  shall be  extended  for a period of time  equal to the  period  Investor
refrains  from  selling  any  securities  included in such  registration  at the
request of an underwriter of Common Stock (or other securities) of the Company.

                  (b)  Prepare  and  file  with  the  SEC  such  amendments  and
supplements to such registration statement and the prospectus used in connection
with  such  registration  statement  as may be  necessary  to  comply  with  the
provisions of the Act with respect to the disposition of all securities  covered
by such registration statement.

                  (c)  Furnish  to  Investor   such   numbers  of  copies  of  a
prospectus,   including  a  preliminary  prospectus,   in  conformity  with  the
requirements of the Act, and such other documents as they may reasonably request
in order to facilitate the disposition of securities.

                  (d)  Use  commercially  reasonable  efforts  to  register  and
qualify the securities  covered by such registration  statement under such other
securities  or Blue  Sky  laws of such  jurisdictions  as  shall  be  reasonably
requested  by  Investor;  provided  that the  Company  shall not be  required in
connection  therewith or as a condition  thereto to qualify to do business or to
file  a  general   consent  to  service  of  process  in  any  such   states  or
jurisdictions,  unless  the  Company  is  already  subject  to  service  in such
jurisdiction and except as may be required by the Act.

                  (e) In the event of any underwritten  public  offering,  enter
into and perform its obligations under an underwriting  agreement,  in usual and
customary form, with the managing underwriter of such offering,  said form to be
agreeable  to the Company and its  counsel.  Investor  shall also enter into and
perform its obligations under such an agreement.

                  (f) Notify Investor at any time when a prospectus  relating to
such  registration  statement is required to be  delivered  under the Act of the
happening  of any  event as a result of which the  prospectus  included  in such
registration  statement,  as then in effect,  includes an untrue  statement of a
material fact or omits to state a material fact required to be stated therein or
necessary  to make the  statements  therein not  misleading  in the light of the
circumstances then existing.

                  (g) Cause all such securities registered pursuant hereunder to
be listed on each securities  exchange on which similar securities issued by the
Company are then listed.


                                       13.
<PAGE>

                  (h) Use  commercially  reasonable  efforts to furnish,  at the
request  of  Investor,  on  the  date  that  securities  are  delivered  to  the
underwriters for sale in connection with a registration pursuant to this Section
5,  if  such  securities  are  being  sold  through  underwriters,  or,  if such
securities  are not  being  sold  through  underwriters,  on the  date  that the
registration statement with respect to such securities becomes effective, (i) an
opinion,  dated such date,  of the  counsel  representing  the  Company  for the
purposes of such registration,  in form and substance as is customarily given to
underwriters in an underwritten public offering,  addressed to the underwriters,
if any, and to Investor and (ii) a letter dated such date,  from the independent
certified  public  accountants  of the  Company,  in form  and  substance  as is
customarily given by independent certified public accountants to underwriters in
an underwritten public offering,  addressed to the underwriters,  if any, and to
Investor.

                  5.3  Expenses  of   Registration.   All  expenses  other  than
underwriting  discounts and commissions  incurred in connection with the request
for registration  pursuant to Section 5.1,  including  (without  limitation) all
registration, filing and qualification fees, printers' and accounting fees, fees
and  disbursements of counsel for the Company  (including fees and disbursements
of counsel for the Company in its capacity as counsel to Investor hereunder;  if
Company  counsel does not make itself  available for this  purpose,  the Company
will pay the  reasonable  fees and  disbursements  of one counsel for  Investor)
shall be borne by the Company and all such expenses for subsequent registrations
shall be borne by Investor;  provided,  however,  that the Company  shall not be
required to pay for any expenses of any  registration  proceeding begun pursuant
to Section 5.1 if the  registration  request is  subsequently  withdrawn  at the
request of Investor (in which case Investor shall bear such  expense);  provided
further,  however, that if at the time of such withdrawal,  Investor has learned
of a material  adverse  change in the condition,  business,  or prospects of the
Company from that known to Investor at the time of its request and has withdrawn
the request with reasonable  promptness  following  disclosure by the Company of
such material adverse change,  then Investor shall not be required to pay any of
such expenses and shall retain its rights pursuant to Section 5.1.

                  5.4 Indemnification.  In the event any securities are included
in a registration statement under this Section 5:

                  (a) To the extent permitted by law, the Company will indemnify
and hold harmless Investor, any underwriter (as defined in the Act) for Investor
and each person, if any, who controls Investor or underwriter within the meaning
of the Act or the 1934 Act, against any losses, claims,  damages, or liabilities
(joint or  several) to which they may become  subject  under the Act or the 1934
Act or other federal or state law, insofar as such losses,  claims,  damages, or
liabilities  (or actions in respect  thereof) arise out of or are based upon any
of  the  following   statements,   omissions  or  violations   (collectively   a
"Violation"): (i) any untrue statement or alleged untrue statement of a material
fact contained in such registration statement, including any preliminary

                                       14.
<PAGE>

prospectus  or  final  prospectus   contained   therein  or  any  amendments  or
supplements  thereto,  (ii) the omission or alleged  omission to state therein a
material fact required to be stated therein, or necessary to make the statements
therein not  misleading,  or (iii) any  violation  or alleged  violation  by the
Company  of the Act,  the 1934  Act,  any  state  securities  law or any rule or
regulation  promulgated  under the Act, or the 1934 Act or any state  securities
law;  and the Company  will pay to each  Investor,  underwriter  or  controlling
person, as incurred,  any legal or other expenses reasonably incurred by them in
connection  with  investigating  or  defending  any such  loss,  claim,  damage,
liability, or action; provided,  however, that the indemnity agreement contained
in this  subsection  5.4(a) shall not apply to amounts paid in settlement of any
such loss, claim,  damage,  liability,  or action if such settlement is effected
without the  consent of the Company  (which  consent  shall not be  unreasonably
withheld),  nor shall the  Company be liable in any such case for any such loss,
claim,  damage,  liability,  or action to the extent that it arises out of or is
based upon a Violation  which  occurs in reliance  upon and in  conformity  with
written  information  furnished  expressly  for  use  in  connection  with  such
registration by any Investor, underwriter or controlling person.

                  (b) To the extent  permitted by law,  Investor will  indemnify
and hold harmless the Company,  each of its directors,  each of its officers who
has signed the  registration  statement,  each person,  if any, who controls the
Company  within the meaning of the Act,  any  underwriter,  and any  controlling
person of any such underwriter or Investor, against any losses, claims, damages,
or  liabilities  (joint or  several) to which any of the  foregoing  persons may
become  subject,  under the Act, or the 1934 Act or other  federal or state law,
insofar as such losses,  claims,  damages, or liabilities (or actions in respect
thereto)  arise  out of or are  based  upon any  Violation,  in each case to the
extent (and only to the extent) that such Violation  occurs in reliance upon and
in conformity with written  information  furnished by Investor expressly for use
in connection with such  registration;  and Investor will pay, as incurred,  any
legal or  other  expenses  reasonably  incurred  by any  person  intended  to be
indemnified pursuant to this subsection 5.4(b), in connection with investigating
or defending  any such loss,  claim,  damage,  liability,  or action;  provided,
however,  that the indemnity agreement contained in this subsection 5.4(b) shall
not  apply to  amounts  paid in  settlement  of any such  loss,  claim,  damage,
liability  or action if such  settlement  is  effected  without  the  consent of
Investor,  which consent shall not be unreasonably withheld;  provided, that, in
no event  shall any  indemnity  under this  subsection  5.4(b)  exceed the gross
proceeds from the offering received by Investor.

                  (c) Promptly after receipt by an indemnified  party under this
Section  5.4  of  notice  of  the  commencement  of any  action  (including  any
governmental action), such indemnified party will, if a claim in respect thereof
is to be made against any indemnifying  party under this Section 5.4, deliver to
the  indemnifying  party a written  notice of the  commencement  thereof and the
indemnifying  party shall have the right to  participate  in, and, to the extent
the indemnifying  party so desires,  jointly with any other  indemnifying  party
similarly noticed, to assume the defense thereof with counsel mutually

                                       15.
<PAGE>

satisfactory  to the  parties;  provided,  however,  that an  indemnified  party
(together with all other  indemnified  parties which may be represented  without
conflict by one counsel)  shall have the right to retain one  separate  counsel,
with  the  fees  and  expenses  to  be  paid  by  the  indemnifying   party,  if
representation  of  such  indemnified  party  by  the  counsel  retained  by the
indemnifying  party would be inappropriate due to actual or potential  differing
interests between such indemnified party and any other party represented by such
counsel  in such  proceeding.  The  failure  to  deliver  written  notice to the
indemnifying  party within a  reasonable  time of the  commencement  of any such
action, if prejudicial to its ability to defend such action,  shall relieve such
indemnifying  party of any liability to the indemnified party under this Section
5.4, but the omission so to deliver  written  notice to the  indemnifying  party
will not relieve it of any liability that it may have to any  indemnified  party
otherwise than under this Section 5.4.

                  (d) If the indemnification provided for in this Section 5.4 is
held by a court of competent  jurisdiction  to be  unavailable to an indemnified
party with respect to any loss, liability, claim, damage, or expense referred to
therein,  then the indemnifying  party, in lieu of indemnifying such indemnified
party  hereunder,  shall  contribute  to the  amount  paid  or  payable  by such
indemnified party as a result of such loss, liability, claim, damage, or expense
in such  proportion  as is  appropriate  to reflect  the  relative  fault of the
indemnifying  party on the one hand and of the indemnified party on the other in
connection  with  the  statements  or  omissions  that  resulted  in such  loss,
liability,  claim,  damage,  or expense as well as any other relevant  equitable
considerations.  The  relative  fault  of  the  indemnifying  party  and  of the
indemnified  party shall be  determined  by reference  to,  among other  things,
whether  the  untrue or  alleged  untrue  statement  of a  material  fact or the
omission  to state a  material  fact  relates  to  information  supplied  by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge,  access to  information,  and  opportunity to correct or prevent such
statement or omission.

                  (e)  Notwithstanding  the  foregoing,  to the extent  that the
provisions on  indemnification  and  contribution  contained in the underwriting
agreement  entered into in connection with the underwritten  public offering are
in conflict with the foregoing  provisions,  the provisions in the  underwriting
agreement shall control.

                  (f) The  obligations  of the Company and  Investor  under this
Section 5.4 shall  survive the  completion  of any offering of  securities  in a
registration statement under this Section 5, and otherwise.

                  5.5 Limitations on Subsequent  Registration  Rights.  From and
after the date of this  Agreement,  the  Company  shall not,  without  the prior
written  consent  of  Investor,  enter  into any  agreement  with any  holder or
prospective  holder of any  securities  of the  Company  which  would allow such
holder or prospective  holder (a) to include such securities in any registration
filed under Section 5.1 hereof,  unless under the terms of such agreement,  such
holder or prospective holder may include such securities

                                       16.
<PAGE>

in any such registration only to the extent that the inclusion of its securities
will not reduce the amount of the  securities of Investor  which are included or
(b) to make a  demand  registration  which  could  result  in such  registration
statement  being declared  effective  prior to the earlier of August 15, 1997 or
within one hundred twenty (120) days of the effective  date of any  registration
effected pursuant to Section 5.1.

                  6. Right of First Offer.

                  6.1 New  Issuances.  The Company hereby grants to Investor the
right of first offer (the  "Right of First  Offer") to purchase a pro rata share
(rounded to the next lowest number) of all (or any part) of any "New Securities"
(as defined in Section 6.2) that the Company  may,  from time to time propose to
sell and issue in a private equity financing.  Such pro rata share, for purposes
of this right of first offer, is the ratio of the number of Shares then owned by
Investor to the total number of shares of Common Stock  outstanding  immediately
prior to such  issuance.  This  Right of First  Offer  shall be  subject  to the
following provisions:

                  6.2  "New  Securities"  shall  mean  any  Common  Stock of the
Company whether or not authorized on the date hereof,  and rights,  options,  or
warrants to purchase  Common Stock and equity  securities of any type whatsoever
that are, or may become, convertible into Common Stock; provided,  however, that
"New Securities" does not include the following:

                  (a)  issuances of any other  securities  issued upon any stock
split, stock dividend, recapitalization, merger, consolidation or similar event;

                  (b)  securities  of  the  Company   issued   pursuant  to  the
acquisition of a business by the Company by merger, purchase of assets, or other
acquisition or reorganization approved by the Board of Directors;

                  (c)  securities  of the  Company  issued  in  connection  with
equipment lease transactions, loan guarantees,  commercial loans, bank financing
transactions or technology licenses approved by the Board of Directors; and

                  (d) shares of Common  Stock,  warrants to  purchase  shares of
Common Stock or options to purchase shares of Common Stock, issued or granted to
officers,  directors,  employees or consultants of the Company pursuant to stock
plans and option plans or other compensatory  arrangements approved by the Board
of Directors.

                  6.3 Notice of New  Securities.  In the event that the  Company
proposes to  undertake  an issuance of New  Securities,  it shall give  Investor
written notice of its  intention,  describing  the type of New  Securities,  the
price,  and the general terms upon which the Company proposes to issue the same.
Investor shall have ten (10) business days after receipt of such notice to agree
to purchase its pro rata share of such New

                                       17.
<PAGE>

Securities  at the price and upon the terms  specified  in the  notice by giving
written notice to the Company and stating therein the quantity of New Securities
to be purchased.

                  6.4  Exercise  of Right  of First  Offer.  In the  event  that
Investor  fails to  exercise in full the right of first  refusal  within the ten
(10)  business day period  specified  above,  the Company shall have ninety (90)
days  thereafter to sell (or enter into an agreement to sell) the New Securities
respecting  which the right of Investor  was not  exercised  at a price and upon
terms  no  more  favorable  to the  purchasers  thereof  than  specified  in the
Company's  notice.  In the event the Company  has not sold (or  entered  into an
agreement to sell) the New Securities  within ninety (90) day period the Company
shall not thereafter  issue or sell any New  Securities,  without first offering
such New Securities to the Investor in the manner provided above.

                  6.5  Transferability.  This  Right of First  Offer  may not be
transferred or assigned by Investor.

                  6.6 Closing.  The purchase and sale of any securities pursuant
to the  exercise  of the Right of First  Offer shall take place at 10:00 a.m. on
the fifth business day following  expiration or early termination of all waiting
periods  imposed on such  purchase and sale by the  Hart-Scott-Rodino  Antitrust
Improvements Act of 1976 (the "HSR Act"), or, if no waiting period is imposed on
such  purchase and sale by the HSR Act,  not later than five (5)  business  days
following Investor's exercise of the Right of First Offer. Any such purchase and
sale shall occur at the offices of the Company  located at the address set forth
on the signature page hereof, or at such other time and place as the Company and
Investor  may  agree.  The  Company  and  Investor  will use their  commercially
reasonable efforts to comply with all Federal and state laws and regulations and
stock  exchange  listing  requirements  applicable  to any  purchase and sale of
securities pursuant to the exercise of the Right of First Offer. The issuance of
such shares shall be subject to compliance  with applicable laws and regulations
of any applicable stock exchange and there shall not then be in effect any order
enjoining or restraining such exercise or issuance.

                  6.7  Reservation  of Shares.  The Company agrees that it shall
not take any of the  actions or series of actions  referred  to in  Paragraph  6
above  which  would  have the  effect of  triggering  the right of  Investor  to
exercise  the Right of First  Offer  unless the  Company  shall have an adequate
number of shares  available or reserved to satisfy any obligation it may have to
issue shares under Paragraph 6 above.

                  6.8 Term.  The  right to  purchase  additional  shares in this
Section 6 shall terminate on December 31, 1999.

                  7.  Conditions  of  Investor's  Obligations  at  Closing.  The
obligations  of Investor  under  subsection 1.2 of this Agreement are subject to
the fulfillment on or

                                       18.
<PAGE>

before the  Closing  of each of the  following  conditions,  the waiver of which
shall not be effective without Investor's consent thereto:

                  7.1  Representations  and Warranties.  The representations and
warranties of the Company  contained in Section 2 shall be true on and as of the
Closing with the same effect as though such  representations  and warranties had
been made on and as of the date of such Closing.

                  7.2 Performance. The Company shall have performed and complied
with all agreements, obligations and conditions contained in this Agreement that
are required to be performed or complied with by it on or before the Closing.

                  7.3 Qualifications. All authorizations, approvals, or permits,
if any, of any governmental authority or regulatory body of the United States or
of any state that are required in connection  with the lawful  issuance and sale
of the  Securities  pursuant  to  this  Agreement  shall  be duly  obtained  and
effective as of the Closing.

                  7.4  Proceedings  and  Documents.   All  corporate  and  other
proceedings in connection with the transactions  contemplated at the Closing and
all documents  incident  thereto shall be  reasonably  satisfactory  in form and
substance to Investor,  and it shall have received all such counterpart original
and certified or other copies of such documents as it may reasonably request.

                  7.5 Opinion of Company  Counsel.  Investor shall have received
from Wilson,  Sonsini,  Goodrich & Rosati,  counsel for the Company, an opinion,
dated  as of the  Closing,  in a  form  reasonably  acceptable  to  counsel  for
Investor.

                  7.6 Waiver of Registration  Rights. The Company shall obtain a
waiver  and/or  consent  from the  requisite  number of holders  of  Registrable
Securities,  as defined in that certain  Registration  Rights  Agreement,  dated
January 27,  1994,  by and among the  Company and each of the parties  listed on
Exhibit A thereto (the  "Rights  Agreement"),  of any and all rights  granted by
that certain Rights Agreement, as required by the Rights Agreement.

                  8.  Conditions of the Company's  Obligations  at Closing.  The
obligations  of the Company to Investor  under this Agreement are subject to the
fulfillment  on or before the  Closing of each of the  following  conditions  by
Investor:

                  8.1  Representations  and Warranties.  The representations and
warranties  of  Investor  contained  in Section 3 shall be true on and as of the
Closing with the same effect as though such  representations  and warranties had
been made on and as of the Closing.

                  8.2  Payment  of  Purchase  Price.  The  Investor  shall  have
delivered the purchase price specified in Section 1.

                                       19.
<PAGE>

                  8.3 Qualifications. All authorizations, approvals, or permits,
if any, of any governmental authority or regulatory body of the United States or
of any state that are required in connection  with the lawful  issuance and sale
of the  Securities  pursuant  to  this  Agreement  shall  be duly  obtained  and
effective as of the Closing.

                  9. Investor  Notice.  In the event that Investor  (which,  for
purposes of this  Section 9 includes  Investor,  its  affiliates  and all of its
subsidiaries)  intends  to,  directly  or  indirectly,  acquire,  or enter  into
discussions,  negotiations,  arrangements or understandings with any third party
to  acquire  prior to the  expiration  of this  Section  9  (including,  without
limitation,  the lapse of the  negative  covenants  of this Section 9.1 upon the
occurrence  of any of the events  described  in  Section  9.1(a)  through  (c)),
beneficial  ownership of any Common Stock and any other securities issued by the
Company  having the  ordinary  power to vote in the election of directors of the
Company  (other than  securities  having such power only upon the happening of a
contingency)  ("Voting Stock"), any securities  convertible into or exchangeable
for Voting Stock,  or any other right to acquire  Voting Stock  (except,  in any
case,  by way of  stock  dividends  or other  distributions  or  offerings  made
available  to the holders of Voting Stock  generally)  and if the effect of such
acquisition would be to increase the voting power of all Voting Stock then owned
by Investor or which Investor has a right to acquire more than 9.9% of the total
voting power of all Voting Stock then outstanding, Investor shall provide to the
Company prior written notice of the proposed  acquisition of Voting Stock.  Such
notice shall include the specific terms of the proposed method of acquisition of
the  securities  of the  Company or the Spinoff  and shall be  delivered  to the
Company  four  business   days  prior  to  the  closing  of  such   transaction.
Notwithstanding  the foregoing,  Investor may acquire Voting Stock without first
providing the Company with prior written notice upon the following events:

                  (a) if any person or group not  affiliated  with  Investor and
then owning  Voting  Stock  representing  at least 5% of the voting power of all
Voting Stock then  outstanding  provides  written notice to the Company or files
any document with the SEC that contains terms that put the Company reasonably on
notice of the likelihood  that such person or group has acquired or is proposing
to acquire any shares of Voting  Stock or the right to acquire  shares of Voting
Stock having aggregate  voting power of more than  twenty-five  percent (25%) of
the total voting power of all shares of Voting  Stock then  outstanding  and, in
the case of a proposal to acquire  such  shares,  the  proposal  and any related
offers to purchase  shares are not  withdrawn  or  terminated  prior to Investor
making an offer to acquire  Voting Stock or  acquiring  Voting Stock in response
thereto;  provided,  however, that the negative covenants of this Section 9 will
resume following the withdrawal of any proposal or offer to purchase shares made
in accordance with this Section 9;

                  (b) if it is publicly  disclosed or Investor  otherwise learns
that the  Company  has  entered  into any letter of intent or  agreement  with a
person or group  that,  if  consummated,  would  result in such  person or group
owning or having the right to

                                       20.
<PAGE>

acquire shares of Voting Stock having aggregate voting power of more than 20% of
the total voting power of all shares of Voting Stock then outstanding;

                  (c) if a tender  offer is made as evidenced by the filing with
the SEC of a Schedule  14D-1 (or any successor  schedule or form  promulgated or
adopted  for such  purpose  by the SEC) and the actual  dissemination  of tender
offer  materials to security  holders by another  person or group to purchase or
exchange for cash or other  consideration any Voting Stock which, if successful,
would  result in such  person or group  owning  or having  the right to  acquire
shares of Voting Stock with aggregate  voting power of at least 50% of the total
voting power of the Company then in effect; or

                  (d) upon the  earlier of a merger,  consolidation,  or sale of
substantially all of the Company's assets or December 31, 1999.

                  (e) Excluded Shares. For purposes of this agreement,  Investor
will not be deemed to have  beneficial  ownership of any Voting Stock held by an
Investor  pension plan or other  employee  benefit  program if Investor does not
have the power to control the investment decisions of such plan or program.

                  10. Miscellaneous.

                  10.1 Survival of Warranties.  The warranties,  representations
and covenants of the Company and Investor  contained in or made pursuant to this
Agreement  shall survive the  execution  and delivery of this  Agreement and the
Closing  and shall in no way be  affected  by any  investigation  of the subject
matter thereof made by or on behalf of Investor or the Company.

                  10.2 Assignment;  Successors and Assigns. No provision of this
Agreement may be assigned  without the prior written  consent of the other party
hereto.  Except as otherwise  provided herein,  the terms and conditions of this
Agreement  shall  inure to the  benefit  of and be binding  upon the  respective
successors and assigns of the parties (including transferees of any Securities).
Nothing in this  Agreement,  express or implied,  is intended to confer upon any
party other than the parties hereto or their  respective  successors and assigns
any rights,  remedies,  obligations,  or liabilities  under or by reason of this
Agreement, except as expressly provided in this Agreement.

                  10.3 Governing  Law. This  Agreement  shall be governed by and
construed  under the laws of the State of  California  as applied to  agreements
among  California  residents  entered into and to be performed  entirely  within
California.

                  10.4  Counterparts.  This  Agreement may be executed in two or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.


                                       21.
<PAGE>

                  10.5 Titles and  Subtitles.  The titles and subtitles  used in
this  Agreement  are used for  convenience  only and are not to be considered in
construing or interpreting this Agreement.

                  10.6  Notices,  etc.  All  notices  and  other  communications
required  or  permitted  hereunder  shall  be in  writing  and  shall be sent by
personal  delivery,  facsimile,  overnight  courier  or mailed by  certified  or
registered mail,  postage prepaid,  return receipt  requested,  to the facsimile
number or address as follows:

                  Company: Interlink Computer Sciences, Inc.
                                    47370 Fremont Boulevard
                                    Fremont, California 94538
                                    Telephone:       (510) 657-9800
                                    Facsimile:       (510) 659-6381
                                    Attention:       Charles W. Jepson

                  with a copy (which will not constitute notice) to:

                                    Wilson, Sonsini, Goodrich & Rosati
                                    650 Page Mill Road
                                    Palo Alto, California 94304-1050
                                    Telephone:       (415) 493-9300
                                    Facsimile:       (415) 493-6811
                                    Attention:       Thomas C. DeFilipps, Esq.

                  Investor:         Cisco Systems, Inc.
                                    170 West Tasman Drive
                                    San Jose, California 95134-1706
                                    Telephone:       (408) 526-4000
                                    Facsimile:       (408) 526-7110
                                    Attention:       Dan Scheinman, Esq.

                  with a copy (which will not constitute notice) to:

                                    Brobeck, Phleger & Harrison, LLP
                                    2200 Geng Road
                                    Two Embarcadero Place
                                    Palo Alto, CA  94303
                                    Telephone:  (415) 424-0160
                                    Facsimile:  (415) 496-2885
                                    Attention:  Edward M. Leonard, Esq.

or to such other  facsimile  number or address  provided  to the parties to this
Agreement  in  accordance   with  this  Section  10.6.  Such  notices  or  other
communications  shall be deemed delivered upon receipt, in the case of overnight
delivery, personal delivery or

                                       22.
<PAGE>

facsimile  transmission  (as evidenced by the confirmation  thereof),  or 2 days
after deposit in the mails (as determined by reference to the postmark).

                  10.7 Finder's Fee.  Each party  represents  that it neither is
nor will be obligated for any finders' fee or commission in connection with this
transaction.  Investor agrees to indemnify and to hold harmless the Company from
any liability for any commission or compensation in the nature of a finders' fee
(and the costs and  expenses of  defending  against  such  liability or asserted
liability) for which such Investor or any of its officers, partners,  employees,
or representatives is responsible.

                  The Company  agrees to indemnify  and hold  harmless  Investor
from any  liability  for any  commission  or  compensation  in the  nature  of a
finders' fee (and the costs and expenses of defending  against such liability or
asserted  liability) for which the Company or any of its officers,  employees or
representatives is responsible.

                  10.8  Expenses.   Irrespective   of  whether  the  Closing  is
effected,  each  party  shall  pay all costs and  expenses  that it incurs  with
respect  to  the  negotiation,  execution,  delivery  and  performance  of  this
Agreement.  If any  action  at law or in  equity  is  necessary  to  enforce  or
interpret the terms of this Agreement, the prevailing party shall be entitled to
reasonable attorney's fees, costs and necessary disbursements in addition to any
other relief to which such party may be entitled.

                  10.9 Amendments and Waivers. Any term of this Agreement may be
amended and the  observance of any term of this  Agreement may be waived (either
generally   or  in  a   particular   instance   and  either   retroactively   or
prospectively),  only with the written consent of the Company and Investor.  Any
amendment or waiver  effected in accordance with this paragraph shall be binding
upon each holder of any  securities  purchased  under this Agreement at the time
outstanding  (including  securities into which such securities are convertible),
each future holder of all such securities, and the Company.

                  10.10  Severability.   If  one  or  more  provisions  of  this
Agreement are held to be  unenforceable  under  applicable  law, such  provision
shall be excluded from this Agreement and the balance of the Agreement  shall be
interpreted  as if such  provision  were so excluded and shall be enforceable in
accordance with its terms.

                  10.11  Entire  Agreement.  This  Agreement  and the  documents
referred  to herein  constitute  the entire  agreement  among the parties and no
party  shall be  liable  or  bound  to any  other  party  in any  manner  by any
warranties,  representations,  or  covenants  except as  specifically  set forth
herein or therein.


                                       23.
<PAGE>

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

                                     COMPANY



                                     By:    /s/ Charles W. Jepson
                                            -----------------------------
                                     Title: President & CEO
                                            -----------------------------


                                     INVESTOR:



                                     By:    /s/ John T. Chambers
                                            -----------------------------
                                     Title: President & CEO
                                            -----------------------------








               [SIGNATURE PAGE TO COMMON STOCK PURCHASE AGREEMENT]

                                       24.


<TABLE>

                                                                                                                     EXHIBIT 11.1

               INTERLINK COMPUTER SCIENCES, INC. AND SUBSIDIARIES
                 COMPUTATION OF NET INCOME (LOSS) PER SHARE (1)
                      (in thousands, except per share data)

<CAPTION>

                                                                              Three months ended               Six  months ended
                                                                              ------------------               -----------------
                                                                           12/31/96        12/31/95        12/31/96         12/31/95
                                                                           --------        --------        --------         -------
                                                                                  (unaudited)                    (unaudited)
<S>                                                                        <C>             <C>              <C>             <C>     
Primary and fully diluted:
     Weighted average shares:
         Common ..................................................           6,492           2,445            5,740           2,445
     Common equivalent shares from stock options
         and warrants ............................................           1,179            --              1,146            --
     Common and common equivalent shares pursuant
         to Staff Accounting Bulletin No. 83 .....................            --               680             --               680
                                                                           -------         -------          -------         -------

Shares used in per share calculation .............................           7,671           3,125            6,886           3,125
                                                                           =======         =======          =======         =======

Net income (loss) ................................................         $   903         $(8,661)         $ 1,342         $(8,407)
                                                                           =======         =======          =======         =======

Net income (loss) per share ......................................         $  0.12         $ (2.77)         $  0.19         $ (2.69)
                                                                           =======         =======          =======         =======


<FN>
(1) There is no  difference  between  primary  and fully  diluted net income per
share for all periods presented.
</FN>
</TABLE>

<TABLE> <S> <C>


<ARTICLE>                     5

       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS                         
<FISCAL-YEAR-END>                                                 JUN-30-1997
<PERIOD-START>                                                    OCT-01-1996
<PERIOD-END>                                                      DEC-31-1996
<CASH>                                                                 27,061
<SECURITIES>                                                                0
<RECEIVABLES>                                                          10,280
<ALLOWANCES>                                                            (640)
<INVENTORY>                                                             1,327
<CURRENT-ASSETS>                                                       40,643
<PP&E>                                                                  1,562
<DEPRECIATION>                                                            171
<TOTAL-ASSETS>                                                         46,614
<CURRENT-LIABILITIES>                                                  18,019
<BONDS>                                                                     0
<COMMON>                                                               49,924
                                                       0
                                                                 0
<OTHER-SE>                                                             24,114
<TOTAL-LIABILITY-AND-EQUITY>                                           46,614
<SALES>                                                                 5,960
<TOTAL-REVENUES>                                                        9,633
<CGS>                                                                     678
<TOTAL-COSTS>                                                           1,887
<OTHER-EXPENSES>                                                        6,409
<LOSS-PROVISION>                                                          100
<INTEREST-EXPENSE>                                                         86
<INCOME-PRETAX>                                                         1,481
<INCOME-TAX>                                                              578
<INCOME-CONTINUING>                                                     1,337
<DISCONTINUED>                                                              0
<EXTRAORDINARY>                                                             0
<CHANGES>                                                                   0
<NET-INCOME>                                                              903
<EPS-PRIMARY>                                                             .12
<EPS-DILUTED>                                                             .12
        

</TABLE>


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