CIDCO INC
10-Q, 1997-05-15
TELEPHONE & TELEGRAPH APPARATUS
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===============================================================================


                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 10-Q

                                   (Mark One)

[ x ] Quarterly  report  pursuant  to  Section  13 or 15(d)  of the  Securities
Exchange Act of 1934 for the quarterly period ended March 31, 1997.
                                       
                                       OR

[ ]   Transition report pursuant to Section 13(d) or 15(d) of the Securities
      Exchange  Act  of  1934  for  the   transition   period  from   __________
      to__________.
                        
                        Commission file number: 0-23296


                               CIDCO INCORPORATED
             (Exact Name of Registrant as Specified in its Charter)

               Delaware                                 13-3500734
   (State  or other jurisdiction of                  (I.R.S. employer
    incorporation or organization)                identification number)


                               220 Cochrane Circle
                              Morgan Hill, CA 95037
              (Address of principal executive offices and zip code)

                                 (408) 779-1162
              (Registrant's telephone number, including area code)

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

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  Registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                        YES    X       NO
                           --------      --------
The number of shares outstanding of the Registrant's Common Stock on May 7, 1997
was 14,418,298.

<PAGE>

                               CIDCO INCORPORATED

                                      INDEX


PART I.       FINANCIAL INFORMATION                                         Page

      ITEM 1.      Financial Statements:

                      Balance sheet at March 31, 1997
                         and December 31, 1996 ................................3

                      Income statement for the three months
                         ended March 31, 1997 and 1996 ........................4

                      Statement of cash flows for the three months
                         ended March 31, 1997 and 1996 ........................5

                      Notes to financial statements ...........................6

      ITEM 2.      Management's Discussion and Analysis of
                         Financial Condition and Results of Operations.........7


PART II.      OTHER INFORMATION

      ITEM 6.      Exhibits and Reports on Form 8-K ..........................10


SIGNATURES ...................................................................11

<PAGE>
   
Part I.       FINANCIAL INFORMATION
Item 1.       Financial Statements


                               CIDCO INCORPORATED
                                  BALANCE SHEET
                (in thousands, except per share data; unaudited)

                                                          March 31, December 31,
                                                            1997        1996
                                                          ---------   ---------
ASSETS
Current assets:
   Cash and cash equivalents ...........................  $  24,417   $  26,509
   Short-term investments ..............................     36,060      38,560
   Accounts receivable, net of allowance
     for doubtful accounts of $3,618 and $2,966 ........     60,379      48,242
   Inventories .........................................      9,178      14,555
   Deferred tax asset ..................................      5,086       5,086
   Other current assets ................................      2,417       1,284
                                                          ---------   ---------

     Total current assets ..............................    137,537     134,236
Property and equipment, net ............................     13,325      14,118
Other assets ...........................................      4,038       4,259
                                                          ---------   ---------

                                                          $ 154,900   $ 152,613
                                                          =========   =========

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
   Accounts payable ....................................  $  20,428   $  16,880
   Accrued liabilities .................................      7,192       6,211
   Accrued taxes payable ...............................      2,473         676
                                                          ---------   ---------

     Total current liabilities .........................     30,093      23,767
                                                          ---------   ---------
Stockholders' equity:
   Common stock, $.01 par value; 35,000 shares
     authorized, 14,452 and 14,399 shares issued .......        145         144
   Additional paid-in capital ..........................     88,065      87,725
   Treasury stock, at cost (692 shares) ................     (8,723)         --
   Retained earnings ...................................     45,320      40,977
                                                          ---------   ---------

      Total stockholders' equity .......................    124,807     128,846
                                                          ---------   ---------
                                                          $ 154,900   $ 152,613
                                                           =========  =========
   The accompanying notes are an integral part of these financial statements.
<PAGE>

                               CIDCO INCORPORATED
                                INCOME STATEMENT
                (in thousands, except per share data; unaudited)


                                                     Three months ended
                                                          March 31,
                                                -----------------------------
                                                   1997                 1996
                                                ----------            -------

Sales ..................................         $  77,030          $  51,686
Cost of sales ..........................            42,783             29,063
                                                 ---------          ---------
Gross margin ...........................            34,247             22,623
                                                 ---------          ---------
Operating expenses:
    Research and development ...........             4,060              3,124
    Selling and marketing ..............            20,428              7,263
    General and administrative .........             2,890              1,686
                                                 ---------          ---------
                                                    27,378             12,073
                                                 ---------          ---------
Income from operations .................             6,869             10,550
Other income, net ......................               459                400
                                                 ---------          ---------
Income before income taxes .............             7,328             10,950
Provision for income taxes .............             2,931              4,380
                                                 ---------          ---------
Net income  ............................         $   4,397          $   6,570
                                                 =========          =========

Earnings per share .....................         $    0.30          $    0.44
                                                 =========          =========

Weighted average shares.................            14,678             15,016
                                                 =========          =========
   The accompanying notes are an integral part of these financial statements.
<PAGE>
<TABLE>

                               CIDCO INCORPORATED
                             STATEMENT OF CASH FLOWS
                            (in thousands; unaudited)
<CAPTION>
                                                                  Three months ended
                                                                       March 31,
                                                                  1997         1996
                                                               ----------     -------
<S>                                                              <C>         <C>
Cash flows provided by operating activities:
   Net income ................................................   $  4,397    $  6,570
   Adjustments to reconcile net income to net cash
      provided by (used in) operating activities:
      Depreciation and amortization ..........................      1,552       1,300
      Equity in losses of affiliate ..........................        387        --
      Changes in assets and liabilities:
       Accounts receivable ...................................    (12,137)      7,398
       Inventories ...........................................      5,377       5,831
       Other current assets ..................................     (1,133)       (110)
       Other assets ..........................................       (166)     (1,504)
       Accounts payable ......................................      3,548      (3,639)
       Accrued liabilities ...................................        981      (3,703)
       Accrued taxes payable .................................      1,797       4,234
                                                                 --------    --------
           Net cash provided by operating activities .........      4,603      16,377
                                                                 --------    --------
Cash flows provided by (used in) investing activities:
   Acquisition of property and equipment .....................       (759)       (611)
   Sale (purchase) of short-term investments, net ............      2,446      (5,045)
                                                                 --------    --------
           Net cash provided by (used in)investing activities       1,687      (5,656)
                                                                 --------    --------
Cash flows provided by (used in) financing activities:
   Issuance of Common Stock ..................................        341         654
   Purchase of treasury stock ................................     (8,723)       --
                                                                 --------    --------
           Net cash provided by (used in) financing activities     (8,382)        654
                                                                 --------    --------
Net increase (decrease) in cash and cash equivalents .........     (2,092)     11,375
Cash and cash equivalents at beginning of period .............     26,509      19,290
                                                                 --------    --------
Cash and cash equivalents at end of period ...................   $ 24,417    $ 30,665
                                                                 ========    ========
Supplemental disclosure of cash flow information:
   Cash paid for income taxes ................................   $  1,134    $    146
                                                                 ========    ========
<FN>
 The accompanying notes are an integral part of these financial statements.
</FN>
</TABLE>
<PAGE>
NOTE 1.   BASIS OF PRESENTATION

The  accompanying  financial  information  is unaudited,  but, in the opinion of
management,  reflects  all  adjustments  (which  include  only normal  recurring
adjustments)  necessary  to present  fairly the  Company's  financial  position,
operating  results  and  cash  flows  for  those  periods   presented.   Certain
information and footnote  disclosures  normally included in financial statements
prepared in accordance with generally accepted  accounting  principles have been
condensed or omitted pursuant to the rules and regulations of the Securities and
Exchange  Commission.  The financial  information  should be read in conjunction
with the  audited  financial  statements  and notes  thereto  for the year ended
December 31, 1996  included in the  Company's  most recent Annual Report on Form
10-K filed with the Securities and Exchange Commission.  Results for the interim
period are not necessarily indicative of results for the entire year.


NOTE 2.   RECENT ACCOUNTING PRONOUNCEMENT


In February 1997, the Financial  Accounting  Standards Board issued Statement of
Financial Accounting  Standards No. 128 ("FAS 128"),  "Earnings Per Share." This
statement is effective for the Company's  quarter ending  December 31, 1997. The
Statement  redefines  earnings  per share under  generally  accepted  accounting
principles.  Under the new standard,  primary  earnings per share is replaced by
basic  earnings  per share and fully  diluted  earnings per share is replaced by
diluted earnings per share.

The  unaudited  pro forma  basic and  diluted  earnings  per share for the three
months ended March 31, 1997 and 1996 computed in accordance  with FAS 128 are as
follows:
                                                        Three months ended
                                                             March 31,
                                                        --------------------
                                                         1997           1996
                                                        -----          -----
Basic earnings per share..................           $   0.31       $   0.46
Diluted earnings per share................               0.30           0.44


NOTE 3.   COMMON STOCK

On January 27, 1997, the Company announced its plans to purchase up to 1 million
shares of its  outstanding  Common Stock.  As of March 31, 1997, the Company had
repurchased 691,600 shares at an aggregate purchase price of $8.7 million.

<PAGE>

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

The  following  information  should  be read in  conjunction  with  the  interim
financial  statements  and the notes thereto in Part I, Item 1 of this Quarterly
Report.


Background

The  Company's  sales  and   distribution   channels  include  direct  marketing
fulfillment  programs,  standard  fulfillment of telephone  company orders,  and
wholesale shipments directly to telephone companies ("Direct to Telco"),  retail
stores ("Retail"),  international  accounts and OEM customers.  Direct marketing
fulfillment programs are sales campaigns run by the Company involving the use of
television and radio  advertising,  consumer  mailings and telemarketing to sell
services  which utilize the  Company's  products and are offered as an agent for
the Regional Bell Operating Companies (each an "RBOC") and independent telephone
operating companies (each an "Independent Telco").  Fulfillment sales, excluding
the direct marketing  programs,  occur when the Company receives an order either
electronically  or through an on-line  transfer  of the  customer by the RBOC or
Independent  Telco, and the Company ships the requested  product directly to the
customer.  In the case of standard  fulfillment  sales,  the RBOC or Independent
Telco  generates the order by performing  the marketing  activities  themselves.
Standard fulfillment sales accounted for 43%, 68% and 50% of sales in 1996, 1995
and 1994,  respectively.  Direct marketing fulfillment sales totaled 25%, 2% and
0% of sales in 1996, 1995 and 1994, respectively.  In the first quarter of 1997,
standard  fulfillment  sales  accounted  for 39% of sales and  direct  marketing
fulfillment sales totaled 50% of sales.

The discussion and analysis which follows in this Quarterly  Report and in other
reports and documents of the Company and oral  statements  made on behalf of the
Company by its  management  and  others may  contain  trend  analysis  and other
forward-looking  statements  within the meaning of Section 21E of the Securities
Exchange Act of 1934 which reflect the  Company's  current views with respect to
future events and financial  results.  These  include  statements  regarding the
Company's earnings, growth and expansion plans, financial targets and forecasts,
and  similar  matters  which  are not  historical  facts.  The  Company  reminds
stockholders  that   forward-looking   statements  are  merely  predictions  and
therefore are inherently  subject to uncertainties and other factors which could
cause the  actual  future  events or  results  to differ  materially  from those
described  in the forward  looking  statements.  These  uncertainties  and other
factors  include,  among other  things,  business  conditions  and growth in the
telecommunications   industry   and  general   economies,   both   domestic  and
international; lower than expected customer orders; competitive factors; changes
in product mix or distribution channels;  performance and financial capabilities
of suppliers and third party  contractors;  and  technological  difficulties and
resource constraints encountered in developing new products. The forward-looking
statements contained in this Quarterly Report and made elsewhere by or on behalf
of the Company should be considered in light of these factors.
<PAGE>

Results of Operations

The following table sets forth for the periods indicated the percentage of sales
represented by certain line items in the Company's income statement:

                                                      As a Percentage of Sales
                                                          Three months ended
                                                               March 31,
                                                       -----------------------
                                                        1997             1996
                                                       ------           ------
Sales ..........................................        100.0%           100.0%
Cost of sales ..................................         55.5             56.2
                                                       ------           ------
Gross margin ...................................         44.5             43.8
                                                       ------           ------
Operating expenses:
   Research and development ....................          5.3              6.0
   Selling and marketing .......................         26.5             14.1
   General and administrative ..................          3.8              3.3
                                                       ------           ------
                                                         35.6             23.4
                                                       ------           ------
Income from operations .........................          8.9             20.4
Other income, net...............................          0.6              0.8
                                                       ------           ------
Income before income taxes .....................          9.5             21.2
Provision for income taxes .....................          3.8              8.5
                                                       ------           ------
Net income .....................................          5.7%            12.7%
                                                       ======           ======

Sales

Sales are recognized  upon shipment of the product to the customer less reserves
for anticipated  returns or retention of certain services  provided by the RBOCs
and customer credit worthiness.  Sales increased 49% to $77 million in the first
quarter of 1997 from $52 million in the first quarter of 1996,  primarily due to
higher unit adjunct sales through the Company's  direct  marketing  programs for
Caller  ID  services  on  behalf  of  Southwestern  Bell and GTE.  Additionally,
standard  fulfillment  sales to US West and Nynex  customers  contributed to the
increase.  These  increases  were offset by a  significant  decrease in sales to
Ameritech  customers,  as well as a  decrease  in the Direct to Telco and Retail
channels.   The  Company's  unit  sales  of  corded   feature  phones   declined
significantly due to the RBOC's increased focus on promotions  utilizing adjunct
products,  as well as a decrease  in the market  price for  corded  phones.  The
Company's unit sales of cordless  phones were lower due to supply  problems with
its Asian  contract  manufacturers.  The  average  selling  price of units  sold
decreased  to $34 per unit from $45 per unit due to the  change  in mix  between
phones and  adjuncts.  Adjunct  sales  accounted  for 96 percent of sales in the
first  quarter of 1997  compared  to 56  percent of sales in the same  period of
1996.

Gross margin

Cost of sales includes  primarily the cost of finished goods  purchased from the
Company's offshore contract  manufacturers,  costs associated with procuring and
warehousing the Company's inventory and royalties payable on licensed technology
used in the Company's products.  Gross margin as a percentage of sales increased
to 44.5% in the first  quarter of 1997 from 43.8% in the first  quarter of 1996.
This increase primarily represented increased sales through the Company's direct
marketing programs, which typically have higher gross margins. This increase was
offset by a $4.3 million charge to write down to net realizable value certain of
the  Company's  inventory  and a number  of  large  fulfillment  programs  which
provided free freight to the customer. The Company expects gross margins to vary
in the future due to changes in sales mix by  distribution  channel  and product
mix.  The Company  believes  gross  margins may decline over time as a result of
increased pricing pressures and changes in sales mix.
<PAGE>

Research and development expenses

Research and development  expenses  represent  primarily salaries for personnel,
associated  benefits  and tooling and  supplies  for  research  and  development
activities.  The  Company's  policy is to expense all research  and  development
expenditures  as incurred except for certain  investments for tooling.  Research
and  development  expenses  increased to $4.1 million in the quarter ended March
31, 1997 from $3.0 million in the first quarter of 1996. This increase primarily
resulted from increased spending on development  projects,  such as ADSI phones,
cordless  telephones  and advanced  screen  phones which  provide  access to the
Internet.  Specifically,  $0.4  million  was  related  to the  Company's  equity
interest in InfoGear which is developing the software for its Internet  product.
This amount will increase during the remainder of 1997. Research and development
expenses as a percentage  of sales  decreased to 5.3% in the quarter ended March
31, 1997 from 6.0% in the like period of 1996. The Company expects that research
and development spending will increase slightly during the remainder of 1997.

Selling and marketing expenses

Selling and marketing expenses represent  primarily  personnel costs,  telephone
and electronic data exchange  expenses,  promotional  costs and travel expenses.
Selling and marketing  expenses  increased to $20.4 million in the quarter ended
March  31,  1997 from  $7.3  million  in the  comparable  period  of 1996.  As a
percentage of sales,  selling and marketing  expenses  increased to 26.5% in the
quarter  ended  March 31,  1997  from  14.1% in the like  period of 1996.  These
increases  were  due  principally  to  the  Company's   increased  promotion  of
intelligent  network  services  through  several  direct mail,  direct  response
television and telemarketing  campaigns  resulting in increased  advertising and
telemarketing  agency  costs.  The Company  expects that  selling and  marketing
expenses as a percentage of sales will remain  approximately the same due to the
anticipated  continued  reliance  on  direct  marketing  activities  during  the
remainder of 1997.

General and administrative expenses

General and administrative  expenses represent primarily salaries,  benefits and
other expenses  associated with the finance and administrative  functions of the
Company.  General and  administrative  expenses increased to $2.9 million in the
quarter ended March 31, 1997 from $1.7 million in the comparable period of 1996.
As a percentage of sales, general and administrative  expenses increased to 3.8%
in the quarter ended March 31, 1997 from 3.3% in the comparable  period of 1996.
These increases  reflect a one time charge on contractually  obligated  expenses
incurred  as  part  of  the  relinquishment  of  day-to-day  duties  of  certain
executives  and  increased  legal costs.  The Company  believes that general and
administrative  expenditures  will decrease from first quarter  spending  levels
during the remainder of 1997.

Provision for income taxes

The  provision  for income taxes in the  quarters  ended March 31, 1997 and 1996
reflects a rate of 40%.

Liquidity and capital resources

The  Company  had  working  capital of $107.4  million  as of March 31,  1997 as
compared to $110.5  million at December 31, 1996.  The  Company's  current ratio
decreased to 4.6 to 1, as of March 31,  1997,  from 5.6 to 1, as of December 31,
1996. The Company's cash, cash equivalents and short-term  investments decreased
$4.6  million  during the  quarter  ended March 31,  1997  primarily  due to the
Company's  repurchase  of 691,600  shares of its common stock for $8.7  million,
offset by cash provided by operating activities of $4.6 million.  Cash generated
by  operations  of $4.6  million  resulted  primarily  from net  income  of $4.4
million,  decreased inventory balances of $5.4 million and increased payable and
accrued  liabilities  balances of $6.3  million,  offset by  increased  accounts
receivable balances of $12.1 million.

The Company has a credit line of $25 million  which is secured by the  Company's
assets.  The interest rate on the line is the bank's prime rate less 0.25%.  The
Company had not borrowed any funds under the line as of March 31, 1997.

Capital expenditures in 1997 (which are budgeted to be approximately $7 million)
are expected to be funded from working capital currently available.  The Company
believes its current cash, cash equivalents,  short-term investments and line of
credit  will  satisfy the  Company's  working  capital  and capital  expenditure
requirements through the end of 1997.
<PAGE>

PART II.      OTHER INFORMATION

ITEM 6.       Exhibits and Reports on Form 8-K

              (a) Exhibits
                      See Index to Exhibits at page 12 below.

              (b) Reports on Form 8-K.
                      The Company  filed one report on Form 8-K during the three
                      months ended March 31, 1997  pertaining to the declaration
                      by the  Company's  Board of Directors of a dividend of one
                      preferred share purchase right for each outstanding  share
                      of the Company's Common Stock.
<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.

                                   CIDCO INCORPORATED


May 12, 1997                       By:/s/Daniel L. Eilers
- ------------                          -------------------
Date                                  Daniel L. Eilers
                                      President and Chief Executive Officer
                                      


May 12, 1997                           /s/Richard D. Kent
- ------------                           ------------------
     Date                              Richard D. Kent
                                       Vice President Finance and Administration
                                       and Chief Financial Officer

<PAGE>
<TABLE>

                               CIDCO INCORPORATED
                                INDEX TO EXHIBITS
<CAPTION>
    Exhibits                                                                             Page
    --------                                                                             ----
       <S>       <C>                                                                     <C>
       3.1       Amended and Restated Certificate of Incorporation. (1)                    --

       3.2       Amended and Restated By-Laws (1).                                         --

       4.1       Second  Amendment  to Revolving  Credit Loan  Agreement  dated
                  October 13, 1995 between Registrant and Comerica Bank. (4)               --

      10.4       Patent  License  Agreement  dated as of May 1, 1989 between the
                 Registrant and American Telephone and Telegraph Company. (1)              --

      10.5       Form of Indemnification Agreement. (1)                                    --

      10.13      Agreement   effective  as  of  December  21,  1992  between  
                 the Registrant and SBC Communications. (1), (2)                           --
                 

      10.14      Lease dated August 15, 1993  between  Thoits  Bros.,  Inc.  and
                  the  Registrant for 220 Cochrane Circle.(1)                              --

      10.16      Lease  dated May 31,  1994,  between  Thoits  Bros.,  Inc.  and
                 the  Registrant  for 225 Cochrane Circle, Units A, B, C, D, and
                 E. (4)                                                                    --

      10.17      Sublease  dated  November 18, 1994,  between  Thoits Bros.  and
                 the  Registrant for 180 Cochrane Circle.(3)                               --

      10.18      Lease dated  November 1, 1994,  between  Thoits Bros.,  Inc. 
                 and the  Registrant for 105  Cochrane Circle, Units A, B, C, D,
                 and E.(3)                                                                 --

      10.19      Registrant's Amended and Restated 1993 Stock Option Plan. (1)             --

      10.20      Registrant's 1994 Directors' Stock Option Plan. (1)                       --

      10.21      Registrant's 1994 Employee Stock Purchase Plan. (1)                       --

      10.22      Agreement dated January 1, 1995 between the Registrant and 
                 Ameritech Services, Inc. (5)                                              --

      10.23      Standard Form of Office Lease between  Registrant and 400 
                 Columbus Avenue, LCC dated May 19, 1995. (5)                              --

      10.24      Employment Agreement dated June 28, 1996 between Registrant and
                  Ian Laing.                                                               14

      10.25      Employment Agreement dated July 29, 1996 between Registrant and
                 Marv Tseu.                                                                19

      10.26      Employment Agreement dated December 16, 1996 between Registrant
                 and Richard D. Kent                                                       24

      10.27      Employment Agreement dated March 17, 1997 between Registrant 
                 and Daniel L. Eilers.                                                     29

      10.28      Option Agreement dated March 12, 1997 between Registrant and 
                 Daniel L. Eilers.                                                         35

      11.1       Computation of Earnings Per Share.                                        41
</TABLE>

 (1)  Incorporated herein by reference to the Company's  registration  statement
      on Form S-1, Registration File No. 33-74114.
 (2)  Confidential  treatment has been granted with respect to certain  portions
      of this document.
 (3)  Incorporated  herein by reference to the Company's  Form 10-K for the year
      ended December 31, 1994.
 (4)  Incorporated  herein  by  reference  to the  Company's  Form  10-Q for the
      quarter ended September 30, 1995.
 (5)  Incorporated  herein  by  reference  to the  Company's  Form  10-Q for the
      quarter ended June 30, 1996
<PAGE>


                              EMPLOYMENT AGREEMENT

AGREEMENT  dated as of June 28,  1996  between  CIDCO  Incorporated,  a Delaware
corporation (the "Company"), and Ian Laing (the "Employee").

                              WHEREAS,  the  Employee  has  been  hired as a key
employee of the Company; and
                              WHEREAS,  the  Company  is  engaged  in  a  highly
technical and competitive business.

NOW,  THEREFORE,  in  consideration of the mutual covenants herein contained and
for  other  good  and  valuable  consideration,   receipt  of  which  is  hereby
acknowledged, the parties, intending to be legally bound, agree as follows:

1.  Employment and Term.

The Company hereby agrees to employ the Employee during the period commencing as
of the date hereof and continuing until this Agreement is terminated pursuant to
the terms hereof, to serve as the Company's  Executive Vice President of R&D and
in such other executive managerial position or positions with the Company or its
subsidiaries  or  affiliates  as shall  hereafter be  designated by the Board of
Directors of the Company,  to perform such managerial duties consistent with the
usual  duties of an officer of his  status.  Such  employment  shall,  except as
otherwise  stated  herein,  be on the same terms and  conditions  as Employee is
currently  employed by the Company.  The Employee hereby accepts such employment
and agrees to devote his full  business  time  exclusively  to the  faithful and
diligent performance of the duties provided herein and agrees in connection with
the  performance of such duties to act in a manner  consistent  with the primary
objective of maximizing the profitability of the Company.

2.  Compensation.

        (a)Salary.  The Company shall compensate the Employee with a base salary
of at least $185,000 (representing the Employee's base salary for 1996), subject
to annual review by the Company's Compensation Committee,  with a minimum annual
increase in 1997 and subsequent years to reflect the percentage  increase in the
cost of living during the preceding  year as reflected in the All Items Consumer
Price  Index  for all urban  consumers  in the San  Francisco-Oakland-San  Jose,
California  area as published by the United States  Bureau of Labor  Statistics.
Payment shall be made in 26 installments.

        (b)Benefits.  The  Employee  shall be  entitled to  participate  in such
pension plans,  401(k) plans,  group health,  accident or life insurance  plans,
group medical and  hospitalization  plans,  stock option plans,  stock  purchase
plans  and  other  similar  benefits,  as  may  hereafter  be  available  to the
executives of the Company.  It is understood  that,  except as set forth herein,
the Company does not by reason of this  Agreement  obligate  itself to make such
benefits available to its employees.

        (c)Expenses.  The Company  shall pay or  reimburse  the Employee for all
expenses  normally  reimbursed by the Company and reasonably  incurred by him in
furtherance of his duties hereunder including, without limitation,  expenses for
traveling,  meals,  hotel  accommodations and the like upon submission by him of
vouchers or an itemized  list  thereof  prepared in  compliance  with such rules
relating  thereto  as the  Board  may,  from  time to time,  adopt and as may be
required in order to permit such  payments as proper  deductions  to the Company
under  the  Internal  Revenue  Code of  1986,  as  amended,  and the  rules  and
regulations adopted pursuant thereto now or hereafter in effect.
<PAGE>

        (d)Vacations. During each year of employment (including the current year
ending December 31, 1996),  the Employee shall be entitled to paid vacations for
an  aggregate  of the  greater  of (A) two weeks,  or (B) such  period as may be
provided from time to time in the Company's  vacation policy.  The Company shall
not pay the Employee any additional  compensation for any vacation time not used
by the Employee.

        (e)Bonuses.  In addition to  Employee's  base  salary,  for the calendar
years ending  December 31, 1996 and 1997,  Employee shall be entitled to receive
as an annual  bonus,  $50,000,  pro rated for such portion of such calendar year
during which Employee was employed by the Company. In addition to the foregoing,
Employee may also receive  bonuses in such amounts,  at such times and upon such
terms as the Board may in its sole discretion,  without any obligation to do so,
determine and award.

3.  Termination.

        (a) This Agreement  shall be terminated upon the happening of any of the
following  events:  (i) whenever the Company or the Employee  shall give written
notice terminating this Agreement; (ii) upon the death of the Employee; or (iii)
upon the Permanent  Disability  (as such term is defined in Section 3(d) hereof)
of the Employee.

        (b) In the event  that the  Employee's  employment  with the  Company is
terminated  by the Company  without Cause (as defined in Section 3(c) hereof) or
is  terminated  by the  Employee  for Good  Reason (as  defined in Section  3(e)
hereof), then for a period of twelve months following the date his employment is
so  terminated,  the Employee  shall  continue to receive the full amount of his
then current base salary, plus any cost of living increase granted to him by the
Company  through  the date of such  termination  of  employment,  plus all other
benefits  to which the  Employee is  entitled  pursuant  to Section  2(b) hereof
(including, without limitation,  continuation of the Employee's participation in
the Company's pension,  401(k) plan,  insurance,  medical,  stock option,  stock
purchase  and other  benefit  plans as if the  Employee's  employment  continued
throughout  such twelve month period),  provided,  however,  that if during such
twelve month period the Employee obtains reasonably  comparable  employment with
another employer,  then the Employee's continuing base salary payments hereunder
shall cease upon the date of commencement of such comparable employment (but the
Employee's   right  to  continued   participation   in  Company  benefits  shall
nevertheless continue until the end of such twelve month period).

        (c) For purposes  hereof,  "Cause" shall mean any of the following:  (i)
the  intentional  failure,  neglect or refusal of the employee to  substantially
fulfill  his  material  duties as an  employee;  (ii) a  material  breach of any
fiduciary duty or other material  dishonesty by the employee with respect to the
Company  or any  affiliate  thereof  resulting  in actual  material  harm to the
Company  or such  affiliate;  or (iii)  the  conviction  of the  employee  for a
fraudulent act or felony.

        (d) For purposes  hereof,  "Permanent  Disability"  shall mean the total
incapacitation  of the Employee so as to preclude  performance  of the duties of
his  employment  hereunder for an aggregate  period of four months in any twelve
month period.

        (e) For purposes hereof, "Good Reason" shall exist if the company shall:
(i) be in breach of or default  under any material  provision of this  Agreement
and not cure such breach within 30 days of receiving  notice of such breach from
the Employee;  (ii) change the principal  work location of the Employee  without
the consent of the  Employee,  which consent may be withheld by the Employee for
any  reason;  (iii)  materially  change the duties of the  Employee  without the
Employee's  consent,  which  consent  may be withheld  by the  Employee  for any
reason;  (iv)  reduce  the  Employee's  base  salary  or  benefits  without  the
Employee's  consent,  which  consent  may be withheld  by the  Employee  for any
reason;  or (v) become  insolvent or bankrupt or file a voluntary or involuntary
petition in  bankruptcy  or make an  assignment  for the benefit of creditors or
consent to the appointment of a trustee or receiver.
<PAGE>
4.  Noncompetition and Nonintervention.

        (a) While in the employ of the Company,  the  Employee  agrees to devote
substantially all of his entire time,  attention and energies to the performance
of the  business  of the  Company  and  the  Employee  shall  not,  directly  or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant  or agent of any other  corporation,  partnership  or other  business
organization,  be  actively  engaged in or  concerned  with any other  duties or
pursuits which  interfere  with the  performance of his duties as an Employee of
the  Company,  or which,  even if  noninterfering,  may be  contrary to the best
interests of the Company.

        (b) For a period of one year after the  termination  or cessation of the
Employee's employment with the Company for any reason (including  termination of
employment by the Company  without Cause),  the Employee shall not,  directly or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant or agent of any  corporation,  partnership or business  organization,
engage in any business  activity  which is directly or indirectly in competition
with the products or services being developed, manufactured,  marketed, provided
or sold by the  Company or which is directly or  indirectly  detrimental  to the
business of the Company.  For a period of eighteen  months after the termination
or  cessation  of the  Employee's  employment  with the  Company  for any reason
(including  termination of employment by the Company without Cause) the Employee
shall not,  directly or indirectly,  alone or as a member of any  partnership or
other  business  organization,  or as a partner,  officer,  director,  employee,
stockholder,  consultant or agent of any  corporation,  partnership  or business
organization  (i)  request  or cause any  customer  of the  Company to cancel or
terminate  any  business  relationship  with the  Company,  or (ii)  solicit  or
otherwise  cause any  employee  of the  Company  to  terminate  such  employee's
relationship with the Company. For the purposes of this Section 4(b), a business
shall be deemed to be in  competition  with the Company  only if the products or
services of such business are substantially similar in function or capability to
the products or services then being developed, manufactured,  marketed, provided
or sold by the Company,  and are marketed to substantially the same type of user
as that to which the  products  and  services  of the  Company  are  marketed or
proposed to be marketed.

5.  Confidential Information.

        (a) The  Employee  will not at any  time,  whether  during  or after the
termination or cessation of his employment, reveal to any person, association or
company any of the trade  secrets or  confidential  information  concerning  the
organization,  business  or  finances of the Company so far as they have come or
may come to his knowledge,  except as may be required in the ordinary  course of
performing  his duties as an  employee of the Company or except as may be in the
public  domain  through no fault of the  Employee,  and the Employee  shall keep
secret all matters entrusted to him and shall not use or attempt to use any such
information in any manner which may injure or cause loss or may be calculated to
injure or cause loss whether directly or indirectly to the Company.

        (b) The Employee  agrees that during his  employment  he shall not make,
use or  permit  to be  used  any  notes,  memoranda,  drawings,  specifications,
programs,  data or other  materials of any nature  relating to any matter within
the scope of the  business of the Company or  concerning  any of its dealings or
affairs  otherwise than for the benefit of the Company.  The Employee shall not,
after the termination or cessation of his  employment,  use or permit to be used
any such notes,  memoranda,  drawings,  specifications,  programs, data or other
materials,  it being  agreed that any of the  foregoing  shall be and remain the
sole  and  exclusive  property  of the  Company  and that  immediately  upon the
termination or cessation of his employment the Employee shall deliver all of the
foregoing, and all copies thereof, to the Company, at its main office.
<PAGE>

6.  Patent and Copyright Assignment.

The  Employee  agrees to assign and  transfer  to the  Company or its  designee,
without any separate  remuneration or compensation,  his entire right, title and
interest  in and to all  Inventions  and  Works  in the  Field  (as  hereinafter
defined),  together  with all United  States and  foreign  rights  with  respect
thereto,  and at the Company's  expenses to execute and deliver all  appropriate
patent and copyright applications for securing United States and foreign patents
and  copyrights on such  Inventions  and Works,  and to perform all lawful acts,
including  giving  testimony,  and to execute and deliver all such  instruments,
that may be  necessary  or proper to vest all such  Inventions  and Works in the
Field and patents and  copyrights  with respect  thereto in the Company,  and to
assist the Company in the prosecution or defense of any  interference  which may
be declared  involving  any said  patent  applications  or patents or  copyright
applications  or  copyrights.  For the  purposes  of this  Agreement,  the words
"Inventions   and  Works"  shall  include  any   discovery,   process,   design,
development,  improvement, application, technique, program or invention, whether
practice or not, conceived or made by the Employee, individually or jointly with
others  (whether  on or off the  Company's  premises  or during or after  normal
working  hours),  on or after July 15, 1996 while in the employ of the  Company,
provided, however, that no discovery, process, design, development, improvement,
application, technique, program or invention reduced to practice or conceived by
the Employee off the Company's  premises and after normal working hours shall be
deemed to be  included in the term  "Inventions  and Works"  unless  directly or
indirectly  related to the business  then being  conducted by the Company or any
business  which  the  Company  is then  actively  exploring  (collectively,  the
"Field").

7.  Binding Effect.

This  Agreement  shall  inure to the  benefit of and shall be  binding  upon the
parties hereto and the Company's  successors or assigns (whether  resulting from
any  reorganization,  consolidation  or merger of the Company or any business to
which all or  substantially  all of the assets of the  Company are sold) and the
Employee's heirs, executors and legal representatives.

8.  Entire Agreement.

This Agreement  contains the entire  agreement and  understanding of the parties
with respect to the subject matter hereof,  supersedes all prior  agreements and
understandings with respect thereto and cannot be modified,  amended,  waived or
terminated,  in whole or in part,  except in  writing  signed by the party to be
charged.

9.  Right to Injunction.

The  Employee  acknowledges  and agrees  that the  services  rendered  and to be
rendered to the Company by him are of a  specialized  and unique  character  and
that  irreparable  and  immediate  damage will result to the Company if Employee
fails to,  refuses to or  neglects  to perform his  agreements  and  obligations
hereunder.  In the event of such a failure,  refusal or neglect by the Employee,
the  Company  shall be  entitled  to  injunctive  relief or any  other  legal or
equitable remedies including the recovery,  by appropriate action, of the amount
of the  actual  damage  caused by the  Company by any such  failure,  refusal or
neglect by the Employee. The remedies provided in this Agreement shall be deemed
cumulative  and the exercise of one shall not preclude the exercise of any other
remedy at law or in equity for the same event or any other event.

10.  Miscellaneous.

        (a)Amendments. No amendment,  modification or waiver of any of the terms
of this  Agreement  shall be valid  unless  made in  writing  and  signed by the
Employee and the Company.

        (b)Successors  in  Interest.  All  provisions  of this  Agreement  shall
survive the  termination  or cessation  of the  Employee's  employment  with the
Company and shall be binding upon and inure to the benefit of and be enforceable
by  and  against  the  respective  heirs,  executors,  administrators,  personal
representatives,  successors  and  assigns  of  either  of the  parties  to this
agreement.
<PAGE>

        (c)Waiver.  The waiver by the Company of a breach of this  Agreement  by
the Employee  shall not operate or be  construed  as a waiver of any  subsequent
breach by the Employee.

        (d)Severability. If any provision of this Agreement shall contravene any
law or any particular  state where the Employee  shall perform  services for the
Company, then this Agreement shall be first construed to be limited in scope and
duration  so as to be  enforceable  in that state,  and if still  unenforceable,
shall then be construed as if such provision is not contained herein.

        (e)Governing  Law. This  Agreement  shall be governed by the laws of the
State of New York without regard to the conflict of laws principles thereof.

        (f)Counterparts.   This  Agreement  may  be  executed  in  two  or  more
counterparts, and by each party on separate counterparts, each of which shall be
deemed an original,  but all of which together shall constitute one and the same
instrument.

   IN WITNESS WHEREOF,  the parties have caused this Agreement to be executed as
of the date first above written.
                                             CIDCO INCORPORATED

                                              By: /s/Paul G. Locklin
                                                  ------------------
                                                  Paul G. Locklin
                                                  President and CEO
                                                  /s/Ian Laing
                                                  ------------------
                                                  Ian Laing

<PAGE>


                                                                 Execution Copy
                              EMPLOYMENT AGREEMENT

AGREEMENT  dated as of July 29,  1996  between  CIDCO  Incorporated,  a Delaware
corporation (the "Company"), and Marv Tseu (the "Employee").

                              WHEREAS,  the  Employee  has  been  hired as a key
employee of the Company; and
                              WHEREAS,  the  Company  is  engaged  in  a  highly
technical and competitive business.

NOW,  THEREFORE,  in  consideration of the mutual covenants herein contained and
for  other  good  and  valuable  consideration,   receipt  of  which  is  hereby
acknowledged, the parties, intending to be legally bound, agree as follows:

1.  Employment and Term.

The Company hereby agrees to employ the Employee during the period commencing as
of the date hereof and continuing until this Agreement is terminated pursuant to
the terms hereof,  to serve as the Company's  Executive  Vice President of Sales
and Marketing and in such other executive  managerial position or positions with
the Company or its  subsidiaries  or affiliates as shall hereafter be designated
by the Board of  Directors of the Company,  to perform  such  managerial  duties
consistent  with the usual duties of an officer of his status.  Such  employment
shall, except as otherwise stated herein, be on the same terms and conditions as
Employee is currently employed by the Company.  The Employee hereby accepts such
employment  and  agrees to devote  his full  business  time  exclusively  to the
faithful and diligent  performance of the duties  provided  herein and agrees in
connection  with the  performance  of such duties to act in a manner  consistent
with the primary objective of maximizing the profitability of the Company.

2.  Compensation.

        (a)Salary.  The Company shall compensate the Employee with a base salary
of at least $190,000 (representing the Employee's base salary for 1996), subject
to annual review by the Company's Compensation Committee,  with a minimum annual
increase in 1997 and subsequent years to reflect the percentage  increase in the
cost of living during the preceding  year as reflected in the All Items Consumer
Price  Index  for all urban  consumers  in the San  Francisco-Oakland-San  Jose,
California  area as published by the United States  Bureau of Labor  Statistics.
Payment shall be made in 26 installments.

        (b)Benefits.  The  Employee  shall be  entitled to  participate  in such
pension plans,  401(k) plans,  group health,  accident or life insurance  plans,
group medical and  hospitalization  plans,  stock option plans,  stock  purchase
plans  and  other  similar  benefits,  as  may  hereafter  be  available  to the
executives of the Company.  It is understood  that,  except as set forth herein,
the Company does not by reason of this  Agreement  obligate  itself to make such
benefits available to its employees.

        (c)Expenses.  The Company  shall pay or  reimburse  the Employee for all
expenses  normally  reimbursed by the Company and reasonably  incurred by him in
furtherance of his duties hereunder including, without limitation,  expenses for
traveling,  meals,  hotel  accommodations and the like upon submission by him of
vouchers or an itemized  list  thereof  prepared in  compliance  with such rules
relating  thereto  as the  Board  may,  from  time to time,  adopt and as may be
required in order to permit such  payments as proper  deductions  to the Company
under  the  Internal  Revenue  Code of  1986,  as  amended,  and the  rules  and
regulations adopted pursuant thereto now or hereafter in effect.
<PAGE>

        (d)Vacations. During each year of employment (including the current year
ending December 31, 1996),  the Employee shall be entitled to paid vacations for
an  aggregate  of the  greater  of (A) two weeks,  or (B) such  period as may be
provided from time to time in the Company's  vacation policy.  The Company shall
not pay the Employee any additional  compensation for any vacation time not used
by the Employee.

        (e)Bonuses. In addition to Employee's base salary, for the calendar year
ending  December 31, 1996 Employee  shall be entitled to receive an annual bonus
of  $125,000,  pro rated for such  portion of such  calendar  year during  which
Employee was employed by the Company. In addition to the foregoing, Employee may
also receive  bonuses in such amounts,  at such times and upon such terms as the
Board may in its sole discretion, without any obligation to do so, determine and
award.

3.  Termination.

        (a) This Agreement  shall be terminated upon the happening of any of the
following  events:  (i) whenever the Company or the Employee  shall give written
notice terminating this Agreement; (ii) upon the death of the Employee; or (iii)
upon the Permanent  Disability  (as such term is defined in Section 3(d) hereof)
of the Employee.

        (b) In the event  that the  Employee's  employment  with the  Company is
terminated  by the Company  without Cause (as defined in Section 3(c) hereof) or
is  terminated  by the  Employee  for Good  Reason (as  defined in Section  3(e)
hereof), then for a period of six months following the date his employment is so
terminated,  the Employee  shall continue to receive the full amount of his then
current  base  salary,  plus any cost of living  increase  granted to him by the
Company  through  the date of such  termination  of  employment,  plus all other
benefits  to which the  Employee is  entitled  pursuant  to Section  2(b) hereof
(including, without limitation,  continuation of the Employee's participation in
the Company's pension,  401(k) plan,  insurance,  medical,  stock option,  stock
purchase  and other  benefit  plans as if the  Employee's  employment  continued
throughout such six month period),  provided,  however,  that if during such six
month period the Employee obtains reasonably  comparable employment with another
employer,  then the Employee's  continuing base salary payments  hereunder shall
cease  upon the date of  commencement  of such  comparable  employment  (but the
Employee's   right  to  continued   participation   in  Company  benefits  shall
nevertheless continue until the end of such six month period).

        (c) For purposes  hereof,  "Cause" shall mean any of the following:  (i)
the  intentional  failure,  neglect or refusal of the employee to  substantially
fulfill  his  material  duties as an  employee;  (ii) a  material  breach of any
fiduciary duty or other material  dishonesty by the employee with respect to the
Company  or any  affiliate  thereof  resulting  in actual  material  harm to the
Company  or such  affiliate;  or (iii)  the  conviction  of the  employee  for a
fraudulent act or felony.

        (d) For purposes  hereof,  "Permanent  Disability"  shall mean the total
incapacitation  of the Employee so as to preclude  performance  of the duties of
his  employment  hereunder for an aggregate  period of four months in any twelve
month period.

        (e) For purposes hereof, "Good Reason" shall exist if the company shall:
(i) be in breach of or default  under any material  provision of this  Agreement
and not cure such breach within 30 days of receiving  notice of such breach from
the Employee;  (ii) change the principal  work location of the Employee  without
the consent of the  Employee,  which consent may be withheld by the Employee for
any  reason;  (iii)  materially  change the duties of the  Employee  without the
Employee's  consent,  which  consent  may be withheld  by the  Employee  for any
reason;  (iv)  reduce  the  Employee's  base  salary  or  benefits  without  the
Employee's  consent,  which  consent  may be withheld  by the  Employee  for any
reason;  or (v) become  insolvent or bankrupt or file a voluntary or involuntary
petition in  bankruptcy  or make an  assignment  for the benefit of creditors or
consent to the appointment of a trustee or receiver.
<PAGE>

4.  Noncompetition and Nonintervention.

        (a) While in the employ of the Company,  the  Employee  agrees to devote
substantially all of his entire time,  attention and energies to the performance
of the  business  of the  Company  and  the  Employee  shall  not,  directly  or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant  or agent of any other  corporation,  partnership  or other  business
organization,  be  actively  engaged in or  concerned  with any other  duties or
pursuits which  interfere  with the  performance of his duties as an Employee of
the  Company,  or which,  even if  noninterfering,  may be  contrary to the best
interests of the Company.

        (b) For a period of one year after the  termination  or cessation of the
Employee's employment with the Company for any reason (including  termination of
employment by the Company  without Cause),  the Employee shall not,  directly or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant or agent of any  corporation,  partnership or business  organization,
engage in any business  activity  which is directly or indirectly in competition
with the products or services being developed, manufactured,  marketed, provided
or sold by the  Company or which is directly or  indirectly  detrimental  to the
business of the Company.  For a period of eighteen  months after the termination
or  cessation  of the  Employee's  employment  with the  Company  for any reason
(including  termination of employment by the Company without Cause) the Employee
shall not,  directly or indirectly,  alone or as a member of any  partnership or
other  business  organization,  or as a partner,  officer,  director,  employee,
stockholder,  consultant or agent of any  corporation,  partnership  or business
organization  (i)  request  or cause any  customer  of the  Company to cancel or
terminate  any  business  relationship  with the  Company,  or (ii)  solicit  or
otherwise  cause any  employee  of the  Company  to  terminate  such  employee's
relationship with the Company. For the purposes of this Section 4(b), a business
shall be deemed to be in  competition  with the Company  only if the products or
services of such business are substantially similar in function or capability to
the products or services then being developed, manufactured,  marketed, provided
or sold by the Company,  and are marketed to substantially the same type of user
as that to which the  products  and  services  of the  Company  are  marketed or
proposed to be marketed.

5.  Confidential Information.

        (a) The  Employee  will not at any  time,  whether  during  or after the
termination or cessation of his employment, reveal to any person, association or
company any of the trade  secrets or  confidential  information  concerning  the
organization,  business  or  finances of the Company so far as they have come or
may come to his knowledge,  except as may be required in the ordinary  course of
performing  his duties as an  employee of the Company or except as may be in the
public  domain  through no fault of the  Employee,  and the Employee  shall keep
secret all matters entrusted to him and shall not use or attempt to use any such
information in any manner which may injure or cause loss or may be calculated to
injure or cause loss whether directly or indirectly to the Company.

        (b) The Employee  agrees that during his  employment  he shall not make,
use or  permit  to be  used  any  notes,  memoranda,  drawings,  specifications,
programs,  data or other  materials of any nature  relating to any matter within
the scope of the  business of the Company or  concerning  any of its dealings or
affairs  otherwise than for the benefit of the Company.  The Employee shall not,
after the termination or cessation of his  employment,  use or permit to be used
any such notes,  memoranda,  drawings,  specifications,  programs, data or other
materials,  it being  agreed that any of the  foregoing  shall be and remain the
sole  and  exclusive  property  of the  Company  and that  immediately  upon the
termination or cessation of his employment the Employee shall deliver all of the
foregoing, and all copies thereof, to the Company, at its main office.
<PAGE>

6.  Patent and Copyright Assignment.

The  Employee  agrees to assign and  transfer  to the  Company or its  designee,
without any separate  remuneration or compensation,  his entire right, title and
interest  in and to all  Inventions  and  Works  in the  Field  (as  hereinafter
defined),  together  with all United  States and  foreign  rights  with  respect
thereto,  and at the Company's  expenses to execute and deliver all  appropriate
patent and copyright applications for securing United States and foreign patents
and  copyrights on such  Inventions  and Works,  and to perform all lawful acts,
including  giving  testimony,  and to execute and deliver all such  instruments,
that may be  necessary  or proper to vest all such  Inventions  and Works in the
Field and patents and  copyrights  with respect  thereto in the Company,  and to
assist the Company in the prosecution or defense of any  interference  which may
be declared  involving  any said  patent  applications  or patents or  copyright
applications  or  copyrights.  For the  purposes  of this  Agreement,  the words
"Inventions   and  Works"  shall  include  any   discovery,   process,   design,
development,  improvement, application, technique, program or invention, whether
practice or not, conceived or made by the Employee, individually or jointly with
others  (whether  on or off the  Company's  premises  or during or after  normal
working  hours),  on or after July 15, 1996 while in the employ of the  Company,
provided, however, that no discovery, process, design, development, improvement,
application, technique, program or invention reduced to practice or conceived by
the Employee off the Company's  premises and after normal working hours shall be
deemed to be  included in the term  "Inventions  and Works"  unless  directly or
indirectly  related to the business  then being  conducted by the Company or any
business  which  the  Company  is then  actively  exploring  (collectively,  the
"Field").

7.  Binding Effect.

This  Agreement  shall  inure to the  benefit of and shall be  binding  upon the
parties hereto and the Company's  successors or assigns (whether  resulting from
any  reorganization,  consolidation  or merger of the Company or any business to
which all or  substantially  all of the assets of the  Company are sold) and the
Employee's heirs, executors and legal representatives.

8.  Entire Agreement.

This Agreement  contains the entire  agreement and  understanding of the parties
with respect to the subject matter hereof,  supersedes all prior  agreements and
understandings with respect thereto and cannot be modified,  amended,  waived or
terminated,  in whole or in part,  except in  writing  signed by the party to be
charged.

9.  Right to Injunction.

The  Employee  acknowledges  and agrees  that the  services  rendered  and to be
rendered to the Company by him are of a  specialized  and unique  character  and
that  irreparable  and  immediate  damage will result to the Company if Employee
fails to,  refuses to or  neglects  to perform his  agreements  and  obligations
hereunder.  In the event of such a failure,  refusal or neglect by the Employee,
the  Company  shall be  entitled  to  injunctive  relief or any  other  legal or
equitable remedies including the recovery,  by appropriate action, of the amount
of the  actual  damage  caused by the  Company by any such  failure,  refusal or
neglect by the Employee. The remedies provided in this Agreement shall be deemed
cumulative  and the exercise of one shall not preclude the exercise of any other
remedy at law or in equity for the same event or any other event.


10.  Miscellaneous.

        (a)Amendments. No amendment,  modification or waiver of any of the terms
of this  Agreement  shall be valid  unless  made in  writing  and  signed by the
Employee and the Company.

        (b)Successors  in  Interest.  All  provisions  of this  Agreement  shall
survive the  termination  or cessation  of the  Employee's  employment  with the
Company and shall be binding upon and inure to the benefit of and be enforceable
by  and  against  the  respective  heirs,  executors,  administrators,  personal
representatives,  successors  and  assigns  of  either  of the  parties  to this
agreement.
<PAGE>

        (c)Waiver.  The waiver by the Company of a breach of this  Agreement  by
the Employee  shall not operate or be  construed  as a waiver of any  subsequent
breach by the Employee.

        (d)Severability. If any provision of this Agreement shall contravene any
law or any particular  state where the Employee  shall perform  services for the
Company, then this Agreement shall be first construed to be limited in scope and
duration  so as to be  enforceable  in that state,  and if still  unenforceable,
shall then be construed as if such provision is not contained herein.

        (e)Governing  Law. This  Agreement  shall be governed by the laws of the
State of New York without regard to the conflict of laws principles thereof.

        (f)Counterparts.   This  Agreement  may  be  executed  in  two  or  more
counterparts, and by each party on separate counterparts, each of which shall be
deemed an original,  but all of which together shall constitute one and the same
instrument.

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

                                                   CIDCO INCORPORATED
                                                   By: /s/Paul G. Locklin
                                                       ------------------
                                                       Paul G. Locklin
                                                       President and CEO

                                                       /s/Marv Tseu
                                                       ------------------
                                                       Marv Tseu

<PAGE>


                              EMPLOYMENT AGREEMENT


AGREEMENT dated as of December, 16, 1996 between CIDCO Incorporated,  a Delaware
corporation (the "Company"), and Rick Kent (the "Employee").

                              WHEREAS,  the  Employee  has  been  hired as a key
employee of the Company; and
                              WHEREAS,  the  Company  is  engaged  in  a  highly
technical and competitive business.

NOW,  THEREFORE,  in  consideration of the mutual covenants herein contained and
for  other  good  and  valuable  consideration,   receipt  of  which  is  hereby
acknowledged, the parties, intending to be legally bound, agree as follows:

1.  Employment and Term.

The Company hereby agrees to employ the Employee during the period commencing as
of the date hereof and continuing until this Agreement is terminated pursuant to
the  terms  hereof,   to  serve  as  the  Company's  Vice  President  Finance  &
Administration and CFO in such other executive  managerial position or positions
with the  Company  or its  subsidiaries  or  affiliates  as shall  hereafter  be
designated by the Board of Directors of the Company,  to perform such managerial
duties  consistent  with the usual  duties of an  officer  of his  status.  Such
employment  shall,  except as otherwise stated herein,  be on the same terms and
conditions as Employee is currently employed by the Company. The Employee hereby
accepts such employment and agrees to devote his full business time  exclusively
to the faithful  and  diligent  performance  of the duties  provided  herein and
agrees in  connection  with the  performance  of such  duties to act in a manner
consistent  with the primary  objective of maximizing the  profitability  of the
Company.

2.  Compensation.

        (a)Salary.  The Company shall compensate the Employee with a base salary
of at least $160,000 (representing the Employee's base salary for 1996), subject
to annual review by the Company's Compensation Committee,  with a minimum annual
increase in 1997 and subsequent years to reflect the percentage  increase in the
cost of living during the preceding  year as reflected in the All Items Consumer
Price  Index  for all urban  consumers  in the San  Francisco-Oakland-San  Jose,
California  area as published by the United States  Bureau of Labor  Statistics.
Payment shall be made in 26 installments.

        (b)Benefits.  The  Employee  shall be  entitled to  participate  in such
pension plans,  401(k) plans,  group health,  accident or life insurance  plans,
group medical and  hospitalization  plans,  stock option plans,  stock  purchase
plans  and  other  similar  benefits,  as  may  hereafter  be  available  to the
executives of the Company.  It is understood  that,  except as set forth herein,
the Company does not by reason of this  Agreement  obligate  itself to make such
benefits available to its employees.

        (c)Expenses.  The Company  shall pay or  reimburse  the Employee for all
expenses  normally  reimbursed by the Company and reasonably  incurred by him in
furtherance of his duties hereunder including, without limitation,  expenses for
traveling,  meals,  hotel  accommodations and the like upon submission by him of
vouchers or an itemized  list  thereof  prepared in  compliance  with such rules
relating  thereto  as the  Board  may,  from  time to time,  adopt and as may be
required in order to permit such  payments as proper  deductions  to the Company
under  the  Internal  Revenue  Code of  1986,  as  amended,  and the  rules  and
regulations adopted pursuant thereto now or hereafter in effect.
<PAGE>

        (d)Vacations. During each year of employment (including the current year
ending December 31, 1996),  the Employee shall be entitled to paid vacations for
an  aggregate  of the  greater  of (A) two weeks,  or (B) such  period as may be
provided from time to time in the Company's  vacation policy.  The Company shall
not pay the Employee any additional  compensation for any vacation time not used
by the Employee.

        (e)Bonuses.  In addition to the  foregoing,  Employee  may also  receive
bonuses in such  amounts,  at such times and upon such terms as the Board may in
its sole discretion, without any obligation to do so, determine and award.

3.  Termination.

        (a) This Agreement  shall be terminated upon the happening of any of the
following  events:  (i) whenever the Company or the Employee  shall give written
notice terminating this Agreement; (ii) upon the death of the Employee; or (iii)
upon the Permanent  Disability  (as such term is defined in Section 3(d) hereof)
of the Employee.

        (b) In the event  that the  Employee's  employment  with the  Company is
terminated  by the Company  without Cause (as defined in Section 3(c) hereof) or
is  terminated  by the  Employee  for Good  Reason (as  defined in Section  3(e)
hereof), then for a period of six months following the date his employment is so
terminated,  the Employee  shall continue to receive the full amount of his then
current  base  salary,  plus any cost of living  increase  granted to him by the
Company  through  the date of such  termination  of  employment,  plus all other
benefits  to which the  Employee is  entitled  pursuant  to Section  2(b) hereof
(including, without limitation,  continuation of the Employee's participation in
the Company's pension,  401(k) plan,  insurance,  medical,  stock option,  stock
purchase  and other  benefit  plans as if the  Employee's  employment  continued
throughout such six month period),  provided,  however,  that if during such six
month period the Employee obtains reasonably  comparable employment with another
employer,  then the Employee's  continuing base salary payments  hereunder shall
cease  upon the date of  commencement  of such  comparable  employment  (but the
Employee's   right  to  continued   participation   in  Company  benefits  shall
nevertheless continue until the end of such six month period).

        (c) For purposes  hereof,  "Cause" shall mean any of the following:  (i)
the  intentional  failure,  neglect or refusal of the employee to  substantially
fulfill  his  material  duties as an  employee;  (ii) a  material  breach of any
fiduciary duty or other material  dishonesty by the employee with respect to the
Company  or any  affiliate  thereof  resulting  in actual  material  harm to the
Company  or such  affiliate;  or (iii)  the  conviction  of the  employee  for a
fraudulent act or felony.

        (d) For purposes  hereof,  "Permanent  Disability"  shall mean the total
incapacitation  of the Employee so as to preclude  performance  of the duties of
his  employment  hereunder for an aggregate  period of four months in any twelve
month period.

        (e) For purposes hereof, "Good Reason" shall exist if the company shall:
(i) be in breach of or default  under any material  provision of this  Agreement
and not cure such breach within 30 days of receiving  notice of such breach from
the Employee;  (ii) change the principal  work location of the Employee  without
the consent of the  Employee,  which consent may be withheld by the Employee for
any  reason;  (iii)  materially  change the duties of the  Employee  without the
Employee's  consent,  which  consent  may be withheld  by the  Employee  for any
reason;  (iv)  reduce  the  Employee's  base  salary  or  benefits  without  the
Employee's  consent,  which  consent  may be withheld  by the  Employee  for any
reason;  or (v) become  insolvent or bankrupt or file a voluntary or involuntary
petition in  bankruptcy  or make an  assignment  for the benefit of creditors or
consent to the appointment of a trustee or receiver.
<PAGE>

4.  Noncompetition and Nonintervention.

        (a) While in the employ of the Company,  the  Employee  agrees to devote
substantially all of his entire time,  attention and energies to the performance
of the  business  of the  Company  and  the  Employee  shall  not,  directly  or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant  or agent of any other  corporation,  partnership  or other  business
organization,  be  actively  engaged in or  concerned  with any other  duties or
pursuits which  interfere  with the  performance of his duties as an Employee of
the  Company,  or which,  even if  noninterfering,  may be  contrary to the best
interests of the Company.

        (b) For a period of one year after the  termination  or cessation of the
Employee's employment with the Company for any reason (including  termination of
employment by the Company  without Cause),  the Employee shall not,  directly or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant or agent of any  corporation,  partnership or business  organization,
engage in any business  activity  which is directly or indirectly in competition
with the products or services being developed, manufactured,  marketed, provided
or sold by the  Company or which is directly or  indirectly  detrimental  to the
business of the Company.  For a period of eighteen  months after the termination
or  cessation  of the  Employee's  employment  with the  Company  for any reason
(including  termination of employment by the Company without Cause) the Employee
shall not,  directly or indirectly,  alone or as a member of any  partnership or
other  business  organization,  or as a partner,  officer,  director,  employee,
stockholder,  consultant or agent of any  corporation,  partnership  or business
organization  (i)  request  or cause any  customer  of the  Company to cancel or
terminate  any  business  relationship  with the  Company,  or (ii)  solicit  or
otherwise  cause any  employee  of the  Company  to  terminate  such  employee's
relationship with the Company. For the purposes of this Section 4(b), a business
shall be deemed to be in  competition  with the Company  only if the products or
services of such business are substantially similar in function or capability to
the products or services then being developed, manufactured,  marketed, provided
or sold by the Company,  and are marketed to substantially the same type of user
as that to which the  products  and  services  of the  Company  are  marketed or
proposed to be marketed.

5.  Confidential Information.

        (a) The  Employee  will not at any  time,  whether  during  or after the
termination or cessation of his employment, reveal to any person, association or
company any of the trade  secrets or  confidential  information  concerning  the
organization,  business  or  finances of the Company so far as they have come or
may come to his knowledge,  except as may be required in the ordinary  course of
performing  his duties as an  employee of the Company or except as may be in the
public  domain  through no fault of the  Employee,  and the Employee  shall keep
secret all matters entrusted to him and shall not use or attempt to use any such
information in any manner which may injure or cause loss or may be calculated to
injure or cause loss whether directly or indirectly to the Company.

        (b) The Employee  agrees that during his  employment  he shall not make,
use or  permit  to be  used  any  notes,  memoranda,  drawings,  specifications,
programs,  data or other  materials of any nature  relating to any matter within
the scope of the  business of the Company or  concerning  any of its dealings or
affairs  otherwise than for the benefit of the Company.  The Employee shall not,
after the termination or cessation of his  employment,  use or permit to be used
any such notes,  memoranda,  drawings,  specifications,  programs, data or other
materials,  it being  agreed that any of the  foregoing  shall be and remain the
sole  and  exclusive  property  of the  Company  and that  immediately  upon the
termination or cessation of his employment the Employee shall deliver all of the
foregoing, and all copies thereof, to the Company, at its main office.

6.  Patent and Copyright Assignment.

The  Employee  agrees to assign and  transfer  to the  Company or its  designee,
without any separate  remuneration or compensation,  his entire right, title and
interest  in and to all  Inventions  and  Works  in the  Field  (as  hereinafter
defined),  together  with all United  States and  foreign  rights  with  respect
thereto,  and at the Company's  expenses to execute and deliver all  appropriate
<PAGE>
patent and copyright applications for securing United States and foreign patents
and  copyrights on such  Inventions  and Works,  and to perform all lawful acts,
including  giving  testimony,  and to execute and deliver all such  instruments,
that may be  necessary  or proper to vest all such  Inventions  and Works in the
Field and patents and  copyrights  with respect  thereto in the Company,  and to
assist the Company in the prosecution or defense of any  interference  which may
be declared  involving  any said  patent  applications  or patents or  copyright
applications  or  copyrights.  For the  purposes  of this  Agreement,  the words
"Inventions   and  Works"  shall  include  any   discovery,   process,   design,
development,  improvement, application, technique, program or invention, whether
practice or not, conceived or made by the Employee, individually or jointly with
others  (whether  on or off the  Company's  premises  or during or after  normal
working  hours),  on or after July 15, 1996 while in the employ of the  Company,
provided, however, that no discovery, process, design, development, improvement,
application, technique, program or invention reduced to practice or conceived by
the Employee off the Company's  premises and after normal working hours shall be
deemed to be  included in the term  "Inventions  and Works"  unless  directly or
indirectly  related to the business  then being  conducted by the Company or any
business  which  the  Company  is then  actively  exploring  (collectively,  the
"Field").

7.  Binding Effect.

This  Agreement  shall  inure to the  benefit of and shall be  binding  upon the
parties hereto and the Company's  successors or assigns (whether  resulting from
any  reorganization,  consolidation  or merger of the Company or any business to
which all or  substantially  all of the assets of the  Company are sold) and the
Employee's heirs, executors and legal representatives.

8.  Entire Agreement.

This Agreement  contains the entire  agreement and  understanding of the parties
with respect to the subject matter hereof,  supersedes all prior  agreements and
understandings with respect thereto and cannot be modified,  amended,  waived or
terminated,  in whole or in part,  except in  writing  signed by the party to be
charged.

9.  Right to Injunction.

The  Employee  acknowledges  and agrees  that the  services  rendered  and to be
rendered to the Company by him are of a  specialized  and unique  character  and
that  irreparable  and  immediate  damage will result to the Company if Employee
fails to,  refuses to or  neglects  to perform his  agreements  and  obligations
hereunder.  In the event of such a failure,  refusal or neglect by the Employee,
the  Company  shall be  entitled  to  injunctive  relief or any  other  legal or
equitable remedies including the recovery,  by appropriate action, of the amount
of the  actual  damage  caused by the  Company by any such  failure,  refusal or
neglect by the Employee. The remedies provided in this Agreement shall be deemed
cumulative  and the exercise of one shall not preclude the exercise of any other
remedy at law or in equity for the same event or any other event.

10.  Miscellaneous.

        (a)Amendments. No amendment,  modification or waiver of any of the terms
of this  Agreement  shall be valid  unless  made in  writing  and  signed by the
Employee and the Company.

        (b)Successors  in  Interest.  All  provisions  of this  Agreement  shall
survive the  termination  or cessation  of the  Employee's  employment  with the
Company and shall be binding upon and inure to the benefit of and be enforceable
by  and  against  the  respective  heirs,  executors,  administrators,  personal
representatives,  successors  and  assigns  of  either  of the  parties  to this
agreement.
<PAGE>

        (c)Waiver.  The waiver by the Company of a breach of this  Agreement  by
the Employee  shall not operate or be  construed  as a waiver of any  subsequent
breach by the Employee.

        (d)Severability. If any provision of this Agreement shall contravene any
law or any particular  state where the Employee  shall perform  services for the
Company, then this Agreement shall be first construed to be limited in scope and
duration  so as to be  enforceable  in that state,  and if still  unenforceable,
shall then be construed as if such provision is not contained herein.

        (e)Governing  Law. This  Agreement  shall be governed by the laws of the
State of New York without regard to the conflict of laws principles thereof.

        (f)Counterparts.   This  Agreement  may  be  executed  in  two  or  more
counterparts, and by each party on separate counterparts, each of which shall be
deemed an original,  but all of which together shall constitute one and the same
instrument.

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

                                                     CIDCO INCORPORATED
                                                     By: /s/Paul G. Locklin
                                                         ------------------
                                                         Paul G. Locklin
                                                         President and CEO

                                                         /s/Richard D. Kent
                                                         ------------------
                                                         Richard D. Kent
<PAGE>


                              EMPLOYMENT AGREEMENT

         AGREEMENT  dated as of March 17, 1997  between  CIDCO  Incorporated, a
Delaware corporation (the "Company"), and Daniel L. Eilers (the "Employee").

          WHEREAS, the Employee has been hired as a key employee of the Company;
and

         WHEREAS,  the Company is engaged in a highly  technical and competitive
business.

         NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  herein
contained  and for other good and  valuable  consideration,  receipt of which is
hereby  acknowledged,  the  parties,  intending  to be legally  bound,  agree as
follows:

1.  Employment and Term.

         The  Company  hereby  agrees to employ the  Employee  during the period
commencing  as of the  date  hereof  and  continuing  until  his  employment  is
terminated pursuant to the terms hereof, to serve as the Company's President and
Chief Executive Officer,  officed at the Company's  headquarters in Morgan Hill,
California, to perform such duties as are consistent with the usual duties of an
officer of this status and to report to the Company's  Board of  Directors.  The
Employee  hereby accepts such  employment and agrees to devote his full business
time exclusively to the faithful and diligent performance of the duties provided
herein (it being  understood  and agreed by the parties that the  Employee  may,
however,  devote such time as is reasonably necessary, in a manner that does not
interfere with the performance of his duties hereunder,  to transitional matters
for his previous  employer NAT Systems and to acting as a member of the Board of
Directors of SPL World Group) and agrees in connection  with the  performance of
such duties to act in a manner consistent with the primary objective of building
long-term shareholder value of the Company.

2.  Compensation.

         (a) Salary.  The Company  shall  compensate  the  Employee  with a base
salary of at least $375,000 per annum  (representing  the annualized rate of the
Employee's  base salary during the remainder of 1997),  subject to annual review
by the Compensation Committee of the Board.

         (b) Benefits.  The Employee  shall be entitled to  participate  in such
pension plans,  401(k) plans,  group health,  accident or life insurance  plans,
group medical and  hospitalization  plans,  stock option plans,  stock  purchase
plans  and  other  similar  benefits,  as  may  hereafter  be  available  to the
executives of the Company.  It is understood  that,  except as set forth herein,
the Company does not by reason of this  Agreement  obligate  itself to make such
benefits available to its employees.

         (c)  Expenses.  The Company shall pay or reimburse the Employee for all
expenses  normally  reimbursed by the Company and reasonably  incurred by him in
furtherance of his duties hereunder including, without limitation,  expenses for
traveling,  meals,  hotel  accommodations and the like upon submission by him of
vouchers or an itemized  list  thereof  prepared in  compliance  with such rules
relating  thereto  as the  Board  may,  from  time to time,  adopt and as may be
required in order to permit such  payments as proper  deductions  to the Company
under  the  Internal  Revenue  Code of  1986,  as  amended,  and the  rules  and
regulations adopted pursuant thereto now or hereafter in effect.

         (d)  Vacations.  During each year of employment  (including the current
year ending December 31, 1997), the Employee shall be entitled to paid vacations
for an aggregate  of the greater of (A) two weeks,  or (B) such period as may be
provided from time to time in the Company's  vacation policy.  The Company shall
not pay the Employee any additional  compensation for any vacation time not used
by the Employee.
<PAGE>

         (e)Bonuses. In addition to the Employee's base salary, for the calendar
year ending December 31, 1997 the Employee shall (if he remains  employed by the
Company on December 31, 1997) be entitled to receive a minimum  bonus of $98,960
payable at such time in 1998 as other  employee  bonuses for calendar  year 1997
are paid by the Company  (but in no event later than  February  15,  1998).  For
subsequent calendar years, the Employee will receive bonuses in such amounts, at
such times and upon such terms as the Compensation Committee of the Board may in
its sole discretion determine and award, provided, however, that the Executive's
"Target Award" under the Company's Annual Executive  Incentive Plan shall not be
less than $125,000.

         (f)Stock  Option.  Pursuant  to a Stock  Option  Agreement  in the form
attached  hereto as Exhibit A, the Company  shall  grant the  Employee an option
(the "Stock Option") to purchase  600,000 shares of the Company's  common stock,
par value $.01 per share,  at an exercise price of $14.25 per share.  Such Stock
Option is to be a  non-statutory  stock option which is not intended to meet the
requirements  of Section 422 of the Internal  Revenue Code of 1986,  as amended.
The Stock Option shall vest in 60 equal monthly installments  beginning with the
installment vesting on April 1, 1997. 3. Termination.

         (a)Employee's employment shall be terminated upon the occurrence of any
of the  following  events:  (i) upon the  death of the  Employee;  (ii) upon the
Permanent  Disability  (as such term is defined in Section  3(d)  hereof) of the
Employee;  (iii) upon written notice of termination of employment by the Company
for Cause or without  Cause (as defined in Section  3(c)  hereof);  or (iv) upon
written  notice of  termination of employment by the Employee for Good Reason or
without Good Reason (as defined in Section 3(e) hereof).

         (b)In the event  that the  Employee's  employment  with the  Company is
terminated by the Company  without Cause or as a result of Permanent  Disability
or is  terminated  by the  Employee for Good  Reason,  then the Employee  shall,
within 30 days following the  employment  termination  date,  receive a lump sum
cash severance payment equal to one year of his then current base salary, Target
Award bonus amount and benefits  value (which shall be a minimum cash payment of
$500,000  plus 12 months of  benefits  value)  and the period  for  vesting  and
exercisability  of the Stock Option  referenced herein shall be extended for one
additional year from the employment termination date

         (c)For purposes  hereof,  "Cause" shall mean any of the following:  (i)
the  intentional  failure,  neglect or refusal of the Employee to  substantially
fulfill  his  material  duties as an  employee;  (ii) a  material  breach of any
fiduciary duty or other material  dishonesty by the Employee with respect to the
Company or any affiliate thereof;  or (iii) the conviction of the Employee for a
felony or crime involving moral turpitude.

         (d)For purposes  hereof,  "Permanent  Disability"  shall mean the total
incapacitation  of the Employee so as to preclude  performance  of the duties of
his  employment  hereunder for an aggregate  period of four months in any twelve
month period.

         (e)For  purposes  hereof,  "Good Reason" shall exist if the Company (or
any successor  resulting from a change of control of the Company) shall:  (i) be
in breach of or default under any material  provision of this  Agreement and not
substantially cure such breach within 30 days of receiving notice of such breach
from the Employee;  (ii) change the principal work location of the Employee to a
location which  increases the Employee's  one-way  commute from his house in Los
Altos Hills,  California without the consent of the Employee,  which consent may
be withheld by the Employee for any reason;  (iii) materially  change the duties
of the Employee without the Employee's consent, which consent may be withheld by
the Employee for any reason; (iv) reduce the Employee's  compensation in any way
without the  Employee's  consent,  which consent may be withheld by the Employee
for any reason;  or (v) become  insolvent  or  bankrupt  or file a voluntary  or
involuntary  petition in  bankruptcy  or make an  assignment  for the benefit of
creditors or consent to the appointment of a trustee or receiver.
<PAGE>

         (f)If any Change in Control Benefit (as hereinafter defined) payable to
the  Employee  (a  "Benefit  Payment")  is or will be  subject to the excise tax
imposed with respect to "excess  parachute  payments"  under section 4999 of the
Code or any interest or  penalties  with respect to such excise tax (such excise
tax, together with any such interest and penalties, are collectively referred to
as the "Excise  Tax"),  the Employee  shall be entitled to receive an additional
payment (a  "Gross-Up  Payment")  in an amount  such that  after  payment by the
Employee of all taxes (including any interest or penalties  imposed with respect
to such taxes), including any Excise Tax, imposed upon the Gross-Up Payment, the
Employee  will retain an amount of the Gross-Up  Payment equal to the Excise Tax
imposed upon the Benefit  Payment.  The Gross-Up Payment shall be payable to the
Employee in accordance with the following provisions:

                  (i)Whenever  the  Employee  becomes  entitled  to receive  any
         Benefit Payment,  the Company's  independent  auditors as designated by
         the Company's  Board of Directors prior to the occurrence of the change
         in control giving rise to such Benefit Payment (the "Accounting  Firm")
         shall  determine (i) whether such Benefit Payment is or will be subject
         to Excise Tax; (ii) whether any Benefit Payments previously made to the
         Employee  ("Prior  Benefit  Payments") are or will be subject to Excise
         Tax in an amount exceeding the amount taken into account in calculating
         the Gross-Up Payment,  if any, that was made to the Employee in respect
         of such  prior  Benefit  Payments;  (iii) the  amount of the Excise Tax
         payable by the Employee  with  respect to such Benefit  Payment and all
         Prior  Benefit  Payments;  and (iv) the amount of the Gross-Up  Payment
         payable to the Employee  hereunder with respect to such Benefit Payment
         and all Prior Benefit Payments, less the amount of any Gross-Up Payment
         previously made to the Employee.

                  (ii) If the Accounting  Firm  determines that no Excise Tax is
         payable by the Employee  with  respect to such Benefit  Payment and all
         Prior Benefit Payments,  the Accounting Firm shall furnish the Employee
         and the Company with a written statement certifying that the Accounting
         Firm has  determined  that no Excise Tax is payable,  setting forth the
         reasons  for its  determination,  and  stating  that the  Employee  has
         substantial  authority  not to report  any  Excise  Tax on his  federal
         income tax return.

                  (iii)  If the  Accounting  Firm  determines  that  a  Gross-Up
         Payment is payable to the  Employee,  it shall furnish the Employee and
         the Company  with a written  statement  of its  determination,  and all
         accompanying   calculations   and   other   material   supporting   its
         determination.  The amount of the Gross-Up Payment so determined by the
         Accounting  Firm to be  payable  to the  Employee  shall be paid to the
         Employee  as  soon  as   practicable   after  the   Accounting   Firm's
         determination has been furnished to the Employee and the Company.

                  (iv) If in connection with any audit of the Employee's federal
         income tax  returns it is  determined  that the  Employee is liable for
         Excise Tax with respect to any Benefit  Payments in an amount in excess
         of the amount taken into account in any  determination  previously made
         by the Accounting Firm under subparagraph  (f)(i), the Employee may, by
         written notice to the Company,  request that a Gross-Up Payment be made
         to the  Employee  with  respect to such  additional  Excise Tax amount.
         Promptly  after  receipt of such  notice,  the Company  shall cause the
         Accounting  Firm to review the Employee's  request and to determine the
         amount,  if any,  of the  Gross-Up  Payment  to which the  Employee  is
         entitled  with  respect  to such  additional  Excise  Tax  amount.  The
         Employee shall furnish the Accounting  Firm with such  information  and
         documents as the Accounting Firm may reasonably request to enable it to
         make a determination as to the Employee's request.  The Accounting Firm
         shall furnish the Employee and the Company with a written  statement of
         its  determination as to the Employee's  request,  and all accompanying
         calculations  and other  material  supporting  its  determination.  The
         Gross-Up  Payment,  if any,  determined  by the  Accounting  Firm to be
         payable  to the  Employee  shall  be  paid to the  Employee  as soon as
         practicable after the Accounting Firm has made its determination.
<PAGE>

                  (g)  For purposes  hereof the  following  terms shall have the
         following meanings:

                  (i)  "Change in Control  Benefit"  means any  payment or other
         benefit that the  Employee may be entitled to receive  under any Change
         in Control  Plan upon a change in control  (as defined in such Plan) or
         upon the Employee's  involuntary  termination (as defined in such Plan)
         following such change in control; and

                  (ii) "Change in Control Plan" means any plan, program, policy,
         or agreement  (including,  without  limitation,  this Agreement and the
         Non-Qualified  Stock Option  Agreement  issued to the Employee on March
         12, 1997) or  resolution of the Board of Directors of the Company under
         which a Change in Control Benefit may be provided to the Employee

4.  Noncompetition and Nonintervention.

         (a) While in the employ of the Company,  the Employee  agrees to devote
substantially all of his work time, attention and energies to the performance of
the business of the Company and the Employee shall not,  directly or indirectly,
alone or as a member of any partnership or other business organization,  or as a
partner, officer, director,  employee,  stockholder,  consultant or agent of any
other  corporation,  partnership  or other  business  organization,  be actively
engaged in or concerned with any other duties or pursuits  which  interfere with
the performance of his duties as an employee of the Company,  or which,  even if
noninterfering, may be contrary to the best interests of the Company.

         (b) For a period of one year after the  termination or cessation of the
Employee's employment with the Company for any reason (including  termination of
employment by the Company  without Cause),  the Employee shall not,  directly or
indirectly,  alone  or  as  a  member  of  any  partnership  or  other  business
organization,  or  as  a  partner,  officer,  director,  employee,  stockholder,
consultant or agent of any  corporation,  partnership or business  organization,
engage in any business  activity  which is directly or indirectly in competition
with the products or services being developed, manufactured,  marketed, provided
or sold by the  Company or which is directly or  indirectly  detrimental  to the
business  of the  Company.  For a period of one year  after the  termination  or
cessation  of  the  Employee's  employment  with  the  Company  for  any  reason
(including  termination of employment by the Company without Cause) the Employee
shall not,  directly or indirectly,  alone or as a member of any  partnership or
other  business  organization,  or as a partner,  officer,  director,  employee,
stockholder,  consultant or agent of any  corporation,  partnership  or business
organization  (i)  request  or cause any  customer  of the  Company to cancel or
terminate  any  business  relationship  with the  Company,  or (ii)  solicit  or
otherwise  cause any  employee  of the  Company  to  terminate  such  employee's
relationship with the Company. For the purposes of this Section 4(b), a business
shall be deemed to be in  competition  with the Company  only if the products or
services of such business are substantially similar in function or capability to
the products or services then being developed, manufactured,  marketed, provided
or sold by the Company,  and are marketed to substantially the same type of user
as that to which the  products  and  services  of the  Company  are  marketed or
proposed to be marketed.

5.  Confidential Information.

         (a) The  Employee  will not at any  time,  whether  during or after the
termination or cessation of his employment, reveal to any person, association or
company any of the trade  secrets or  confidential  information  concerning  the
organization,  business  or  finances of the Company so far as they have come or
may come to his knowledge,  except as may be required in the ordinary  course of
performing  his duties as an  employee of the Company or except as may be in the
public  domain  through no fault of the  Employee,  and the Employee  shall keep
secret all matters entrusted to him and shall not use or attempt to use any such
information in any manner which may injure or cause loss or may be calculated to
injure or cause loss whether directly or indirectly to the Company.
<PAGE>

         (b) The Employee  agrees that during his  employment he shall not make,
use or  permit  to be  used  any  notes,  memoranda,  drawings,  specifications,
programs,  data or other  materials of any nature  relating to any matter within
the scope of the  business of the Company or  concerning  any of its dealings or
affairs  otherwise than for the benefit of the Company.  The Employee shall not,
after the termination or cessation of his  employment,  use or permit to be used
any such notes,  memoranda,  drawings,  specifications,  programs, data or other
materials,  it being  agreed that any of the  foregoing  shall be and remain the
sole  and  exclusive  property  of the  Company  and that  immediately  upon the
termination or cessation of his employment the Employee shall deliver all of the
foregoing, and all copies thereof, to the Company, at its main office.

6.  Patent and Copyright Assignment.

         The  Employee  agrees to assign  and  transfer  to the  Company  or its
designee,  without any separate remuneration or compensation,  his entire right,
title  and  interest  in  and to all  Inventions  and  Works  in the  Field  (as
hereinafter  defined),  together with all United States and foreign  rights with
respect  thereto,  and at the  Company's  expenses  to execute  and  deliver all
appropriate  patent and copyright  applications  for securing  United States and
foreign patents and copyrights on such Inventions and Works,  and to perform all
lawful acts,  including  giving  testimony,  and to execute and deliver all such
instruments,  that may be  necessary or proper to vest all such  Inventions  and
Works in the Field and  patents  and  copyrights  with  respect  thereto  in the
Company,  and to  assist  the  Company  in the  prosecution  or  defense  of any
interference  which may be declared  involving any said patent  applications  or
patents or  copyright  applications  or  copyrights.  For the  purposes  of this
Agreement,  the words  "Inventions  and  Works"  shall  include  any  discovery,
process, design, development,  improvement,  application,  technique, program or
invention,  whether  practice  or  not,  conceived  or  made  by  the  Employee,
individually or jointly with others (whether on or off the Company's premises or
during or after normal  working  hours),  on or after July 15, 1996 while in the
employ of the Company,  provided,  however, that no discovery,  process, design,
development,  improvement,  application, technique, program or invention reduced
to practice or conceived by the  Employee off the  Company's  premises and after
normal working hours shall be deemed to be included in the term  "Inventions and
Works"  unless  directly  or  indirectly  related  to the  business  then  being
conducted  by the Company or any  business  which the  Company is then  actively
exploring (collectively, the "Field").

7.  Binding Effect.

         This Agreement  shall inure to the benefit of and shall be binding upon
the parties hereto and the Company's  successors or assigns  (whether  resulting
from any reorganization,  consolidation or merger of the Company or any business
to which all or substantially all of the assets of the Company are sold) and the
Employee's heirs, executors and legal representatives.

8.  Entire Agreement.

         This Agreement  contains the entire agreement and  understanding of the
parties  with  respect  to the  subject  matter  hereof,  supersedes  all  prior
agreements  and  understandings  with  respect  thereto and cannot be  modified,
amended, waived or terminated,  in whole or in part, except in writing signed by
both parties.

9.  Right to Injunction.

         The Employee  acknowledges and agrees that the services rendered and to
be rendered to the Company by him are of a specialized and unique  character and

<PAGE>

that  irreparable  and  immediate  damage will result to the Company if Employee
fails to,  refuses to or  neglects  to perform his  agreements  and  obligations
hereunder.  In the event of such a failure,  refusal or neglect by the Employee,
the  Company  shall be  entitled  to  injunctive  relief or any  other  legal or
equitable remedies including the recovery,  by appropriate action, of the amount
of the  actual  damage  caused by the  Company by any such  failure,  refusal or
neglect by the Employee. The remedies provided in this Agreement shall be deemed
cumulative  and the exercise of one shall not preclude the exercise of any other
remedy at law or in equity for the same event or any other event.

10.  Miscellaneous.

                  (a) Amendments. No amendment, modification or waiver of any of
the terms of this Agreement  shall be valid unless made in writing and signed by
the Employee and the Company.

                  (b)  Successors in Interest.  All provisions of this Agreement
shall survive the termination or cessation of the Employee's employment with the
Company and shall be binding upon and inure to the benefit of and be enforceable
by  and  against  the  respective  heirs,  executors,  administrators,  personal
representatives,  successors  and  assigns  of  either  of the  parties  to this
Agreement.

                  (c)  Waiver.  The  waiver by the  Company  of a breach of this
Agreement  by one party  shall not  operate or be  construed  as a waiver of any
subsequent breach by either party.

                  (d)  Severability.  If any provision of this  Agreement  shall
contravene  any law or any  particular  state where the Employee  shall  perform
services for the Company,  then this  Agreement  shall be first  construed to be
limited in scope and  duration so as to be  enforceable  in that  state,  and if
still  unenforceable,  shall  then  be  construed  as if such  provision  is not
contained herein.

                  (e) Governing  Law. This  Agreement  shall be governed by the
laws  of the  State  of  California  without  regard  to the  conflict  of  laws
principles thereof.

                  (f)  Counterparts.  This  Agreement  may be executed in two or
more  counterparts,  and by each party on separate  counterparts,  each of which
shall be deemed an original,  but all of which together shall constitute one and
the same instrument.

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

                                                        CIDCO INCORPORATED


                                                     By: /s/Paul G.Locklin
                                                         -----------------
                                                     Paul G. Locklin
                                                     ---------------------
                                                     Co-Chairman of the Board


                                                     /s/Daniel L. Eilers
                                                     ---------------------
                                                     Daniel L. Eilers
<PAGE>


                               CIDCO INCORPORATED
                             STOCK OPTION AGREEMENT
                           NON-QUALIFIED STOCK OPTION


                  AGREEMENT  entered  into this  12th day of March,  1997 by and
between CIDCO  Incorporated,  a Delaware  corporation,  with principal executive
offices at 220 Cochrane Circle,  Morgan Hill, CA 95037 (the "Company"),  and the
undersigned  director and executive (the "Employee") of the Company (the Company
and its subsidiaries herein together referred to as the "Company").

                  Whereas,  the Employee  will execute an  Employment  Agreement
(the  "Employment  Agreement")  dated March 17, 1997 to serve as  President  and
Chief Executive Officer of the Company; and

                  Whereas,   the  Company   desires  to  grant  the  Employee  a
non-qualified stock option to acquire shares of the Company's common stock, $.01
par value per share (the  "Shares"),  at an exercise  price equal to the closing
price of the  Company's  common stock on the last trading day prior to the grant
date of such option.

                  ACCORDINGLY,  in  consideration  of  the  premises  and of the
mutual covenants and agreements  contained herein,  the Company and the Employee
hereby agree as follows:


A. Grant of Option.  The Company  hereby  irrevocably  grants to the  Employee a
non-qualified  stock  option (the  "Option")  to purchase  all or any part of an
aggregate of six hundred  thousand  (600,000) Shares on the terms and conditions
hereinafter set forth.

                   1. Purchase Price. The purchase price ("Purchase  Price") for
the Shares covered by the Option shall be $14.25 per Share, which represents the
closing price of the Company's common stock on the last trading day prior to the
Option's grant date.

                  2.  Time of Exercise of Option.

                            (a) The Option shall become  exercisable for one and
two thirds per cent (1.67%) of the Shares covered thereby monthly on the twelfth
day of each  month  after  the  date of  grant,  so that  the  Option  shall  be
exercisable as follows:


                                      Percentage of
                                      Shares Becoming              Cumulative
                                       Available for               Percentage
                                    On or After Exercise            Available
                                   ---------------------          -----------
April 12, 1997                               1.67%                      1.67%
May 12, 1997                                 1.67%                      3.34%
June 12, 1997                                1.67%                      5.00%
July 12, 1997                                1.67%                      6.67%
August 12, 1997                              1.67%                      8.34%
September 12, 1997                           1.67%                     10.00%
October 12, 1997                             1.67%                     11.67%
November 12, 1997                            1.67%                     13.34%
December 12, 1997                            1.67%                     15.00%
January 12, 1998                             1.67%                     16.67%
February 12, 1998                            1.67%                     18.34%
March 12, 1998                               1.67%                     20.00%
April 12, 1998                               1.67%                     21.67%
May 12, 1998                                 1.67%                     23.34%
June 12, 1998                                1.67%                     25.00%
July 12, 1998                                1.67%                     26.67%
August 12, 1998                              1.67%                     28.34%
September 12, 1998                           1.67%                     30.00%
October 12, 1998                             1.67%                     31.67%
November 12, 1998                            1.67%                     33.34%
December 12, 1998                            1.67%                     35.00%
<PAGE>
January 12, 1999                             1.67%                     36.67%
February 12, 1999                            1.67%                     38.34%
March 12, 1999                               1.67%                     40.00%
April 12, 1999                               1.67%                     41.67%
May 12, 1999                                 1.67%                     43.34%
June 12, 1999                                1.67%                     45.00%
July 12, 1999                                1.67%                     46.67%
August 12, 1999                              1.67%                     48.34%
September 12, 1999                           1.67%                     50.00%
October 12, 1999                             1.67%                     51.67%
November 12, 1999                            1.67%                     53.34%
December 12, 1999                            1.67%                     55.00%
January 12, 2000                             1.67%                     56.67%
February 12, 2000                            1.67%                     58.34%
March 12, 2000                               1.67%                     60.00%
April 12, 2000                               1.67%                     61.67%
May 12, 2000                                 1.67%                     63.34%
June 12, 2000                                1.67%                     65.00%
July 12, 2000                                1.67%                     66.67%
August 12, 2000                              1.67%                     68.34%
September 12, 2000                           1.67%                     70.00%
October 12, 2000                             1.67%                     71.67%
November 12, 2000                            1.67%                     73.34%
December 12, 2000                            1.67%                     75.00%
January 12, 2001                             1.67%                     76.67%
February 12, 2001                            1.67%                     78.34%
March 12, 2001                               1.67%                     80.00%
April 12, 2001                               1.67%                     81.67%
May 12, 2001                                 1.67%                     83.34%
June 12, 2001                                1.67%                     85.00%
July 12, 2001                                1.67%                     86.67%
August 12, 2001                              1.67%                     88.34%
September 12, 2001                           1.67%                     90.00%
October 12, 2001                             1.67%                     91.67%
November 12, 2001                            1.67%                     93.34%
December 12, 2001                            1.67%                     95.00%
January 12, 2002                             1.67%                     96.67%
February 12, 2002                            1.67%                     98.34%
March 12, 2002                               1.67%                    100.00%

                  3.  Term of Options; Exercisability.

                           (a)  Term.

                   (1) Each  Option  shall  expire  not more than ten (10) years
from  the  date of the  granting  thereof,  but  shall  be  subject  to  earlier
termination as herein provided.

                  (2) If the Employee ceases to serve as an employee or director
of the Company,  he may exercise his Option, but only within 12 months after the
date he ceases to be an employee or director of the Company.  If such  cessation
of  employment  resulted  from  a  termination  for  Cause  (as  defined  in the
Employment  Agreement) by the Company or from a termination  without Good Reason
(as defined in the Employment Agreement) by the Employee,  then the Option shall
only be  exercisable to the extent that the Employee was entitled to exercise it
at the date of such termination. If such cessation of employment resulted from a
termination  without Cause by the Company or from a termination with Good Reason
by the  Employee,  then the Option shall be  exercisable  to the extent that the
Employee would have been entitled if his employment termination had occurred one
year after the actual date of termination.  Notwithstanding the foregoing, in no
event may the Option be  exercised  after its term set forth in Section  3(a)(1)
has  expired.  To the extent that the  Employee  was not entitled to exercise an
Option at the date of such termination,  or does not exercise such Option (which
he was entitled to exercise) within the time specified herein,  the Option shall
terminate unless otherwise provided in this Section 3(a)(2).

                  Notwithstanding  the foregoing,  in the event that,  within 90
days prior to or 12 months  following the  announcement of any change of control
of the  Company  (whether  by merger  or  tender  offer for more than 50% of the
outstanding  voting stock or proxy contest for the election of a majority of the
members of the Company's Board of Directors or otherwise), the Employee optionee
is  terminated  as an  employee  without  Cause (as  defined  in the  Employment
Agreement) or resigns with Good Reason (as defined in the Employment Agreement),
all  outstanding  options  held by the  Employee  shall be subject to  immediate
acceleration,  and  any  shares  which  are  not  vested  at the  time  of  such
termination of employment shall immediately vest in full and he may exercise his
option  within 12 months  after  the date he  ceases  to be an  employee  of the
Company.
<PAGE>

                  (3) Notwithstanding  the foregoing,  if such termination as an
employee is because the Executive has become  permanently  disabled (without the
meaning of Section  22(e)(3) of the Internal  Revenue  Code of 1986,  as amended
(the "Code")),  such Option shall terminate on the last day of the twelfth month
from the date the Employee ceases to be an employee, or on the date on which the
Option expires by its terms, whichever occurs first.

                  (4)  In the event of the death of the Employee:

                           (i) during the term of the  Option,  who, at the time
of his death shall have been in Continuous  Status as an employee or director of
the Company since the date of grant of the Option,  the Option may be exercised,
at any time  within 12 months  following  the date of death,  by the  Employee's
estate or by a person who  acquired  the right to exercise the Option by bequest
or inheritance,  but only to the extent of the right to exercise that would have
accrued had the Employee  continued living and remained in Continuous  Status as
an employee  or  director of the Company for 12 months  after the date of death.
Notwithstanding the foregoing, in no event may the Option be exercised after its
term set forth in Section 3(a)(1) has expired.

                           (ii)  within  30  days  after  the   termination   of
Continuous  Status as an employee or director of the Company,  the Option may be
exercised,  at any time  within 12 months  following  the date of death,  by the
Employee's  estate or by a person who  acquired the right to exercise the Option
by bequest or inheritance,  but only to the extent of the right to exercise that
had accrued at the date of  termination.  Notwithstanding  the foregoing,  in no
event may the option be  exercised  after its term set forth in Section  3(a)(i)
has expired.

                           For  purposes of this  Section  3(a)(4),  "Continuous
Status" shall mean the absence of any  interruption or termination of service as
an employee or director of the Company.
                  
                  (b) Exercisability.

                  If the  Employee  ceases to be an  employee or director of the
Company,  except as otherwise herein provided in Section 3(a)(2) with respect to
termination of employment  without Cause or with Good Reason, the Option granted
to the Employee hereunder shall be exercisable only to the extent that the right
to  purchase  Shares  under such Option has accrued and is in effect on the date
such  Employee  ceases to be an employee or director of the Company.  No partial
exercise of the Option may be made for less than twenty-five (25) full Shares of
common stock.

                  4.  Manner of Exercise of Option.

                            (b) To the  extent  that the right to  exercise  the
Option has accrued and is in effect,  the Option may be  exercised in full or in
part by  giving  written  notice to the  Company  stating  the  number of Shares
exercised and  accompanied by payment in full for such Shares.  Payment shall be
wholly in cash.  Upon such  exercise,  delivery of a  certificate  for  paid-up,
non-assessable  Shares shall be made at the  principal  office of the Company to
the person  exercising the Option,  Not more than thirty (30) days from the date
of receipt of the notice by the Company.

                            (c) The Company  shall at all times  during the term
of the Option  reserve  and keep  available  such number of Shares of its common
stock as will be  sufficient  to satisfy the  requirements  of the  Option.  The
Employee  shall not have any of the rights of a  stockholder  of the  Company in
respect of the Shares  until one or more  certificates  for such Shares shall be
delivered to him or her upon the due exercise of the Option.
<PAGE>

                  5. Non-Transferability.  The right of the Employee to exercise
the Option shall not be assignable  or  transferable  by the Employee  otherwise
than by will or the laws of  descent  and  distribution,  and the  Option may be
exercised  during the lifetime of the Employee  only by him. The Option shall be
null and void and without effect upon the bankruptcy of the Employee or upon any
attempted  assignment or transfer,  except as  hereinabove  provided,  including
without limitation any purported  assignment,  whether voluntary or by operation
of law, pledge,  hypothecation or other  disposition  contrary to the provisions
hereof, or levy of execution,  attachment,  divorce,  trustee process or similar
process, whether legal or equitable, upon the Option.

                  6.  Representation  Letter and Investment Legend. In the event
that for any reason the Shares to be issued upon  exercise  of the Option  shall
not be effectively registered under the Securities Act of 1933 (the "1933 Act"),
upon any date on which the Option is exercised  in whole or in part,  the person
exercising the Option shall give a written  representation to the Company in the
form  attached  hereto as Exhibit 1 and the company  shall place an  "investment
legend,"  so-called,  as  described in Exhibit 1, upon any  certificate  for the
Shares issued by reason of such exercise.

                  7.  Adjustments on Changes in  Capitalization.  Adjustments on
Changes in Capitalization  and the like shall be made in accordance with Section
11 of the Company's  1993 Employee  Stock Option (the "Plan") Plan, as in effect
on the date of this Agreement.

                  8. Rights as a Shareholder.  The Employee shall have no rights
as a  shareholder  with respect to any Shares which may be purchased by exercise
of this Option unless and until a certificate or certificates  representing such
Shares are duly issued and  delivered to the Employee.  No  adjustment  shall be
made for  dividends  or other  rights for which the record  date is prior to the
date such stock certificate is issued.

                  9.  Withholding  Taxes.  Whenever Shares are to be issued upon
exercise  of this  Option,  the  Company  shall  have the right to  require  the
Employee to remit to the Company an amount  sufficient  to satisfy all  Federal,
state  and local  withholding  tax  requirements  prior to the  delivery  of any
certificate or certificates for such Shares.

                  10. No  Qualification  under Section 422. It is understood and
intended that the Option  granted  hereunder  shall not qualify as an "incentive
stock option" as defined in Section 422 of the Code. If the Employee  intends to
dispose or does dispose  (whether by sale,  gift,  transfer or otherwise) of any
Shares received upon exercise of this Option,  he will notify the Company within
thirty (30) days after such disposition.

                  11. Change of Control. In the event of a sale or conveyance to
another  entity of all or  substantially  all of the  property  or assets of the
Company, a Change in Control (as defined in the Plan), hostile or otherwise, the
effect of such events on this Option  shall be as set forth in Sections 9 and 11
of the Plan.

                  IN WITNESS  WHEREOF,  the Company has caused this Agreement to
be executed by its officer  thereunto  duly  authorized,  and the  Employee  has
hereunto set his hand, all as of the day and year first above written.

                                           CIDCO INCORPORATED
                                           By: /s/Paul G. Locklin
                                               ---------------------------
                                           Title: Co-Chairman of the Board

                                           DIRECTOR
                                           Name: Daniel L. Eilers

<PAGE>

                                    EXHIBIT 1
                            TO STOCK OPTION AGREEMENT

Gentlemen:

                  In  connection  with the exercise by me as to shares of common
         stock,  par value $.01 per  share,  of CIDCO  Incorporated,  a Delaware
         corporation (the "Company") under the non-qualified  stock option dated
         March 12, 1997,  granted to me under the 1994  Directors'  Stock Option
         Plan, I hereby acknowledge that I have been informed as follows:

1.       The shares of common  stock of the  Company to be issued to me pursuant
         to the  exercise  of said  option  have not been  registered  under the
         Securities Act of 1933, as amended (the "Act"),  and accordingly,  must
         be held  indefinitely  unless such shares are  subsequently  registered
         under the Act, or an exemption from such registration is available.

                  2. Routine sales of securities  made in reliance upon Rule 144
         under the Act can be made only after the holding  period and in limited
         amounts in accordance  with the terms and  conditions  provided by that
         Rule,  and  in  any  sale  to  which  that  rule  is  not   applicable,
         registration or compliance with some other exemption under the Act will
         be required.

                  3. The Company is under no  obligation  to me to register  the
         shares or to comply with any such exemptions under the Act.

                  4. The  availability  of Rule 144 is dependent  upon  adequate
         current public  information with respect to the Company being available
         and, at the time that I may desire to make a sale pursuant to the Rule,
         the  Company  may  neither  wish  nor  be  able  to  comply  with  such
         requirement.

                  In  consideration  of the  issuance  of  certificates  for the
shares to me, I hereby represent and warrant that I am acquiring such shares for
my own account for investment, and that I will not sell, pledge or transfer such
shares in the absence of an effective  registration statement covering the same,
except as permitted by the provisions of Rule 144, if applicable,  or some other
applicable exemption under the Act. In view of this representation and warranty,
I agree  that  there may be  affixed  to the  certificates  for the shares to be
issued to me, and to all certificates issued hereafter  representing such shares
(until in the opinion of counsel, which opinion must be reasonably  satisfactory
in form and substance to counsel for the Company,  it is no longer  necessary or
required) a legend as follows:

"The  shares of  common  stock  represented  by this  certificate  have not been
registered  under the  Federal  Securities  Act of 1933,  as  amended.  and were
acquired by the registered holder pursuant to a representation and warranty that
such holder was  acquiring  such shares for his own account and for  investment,
with no  intention  to  transfer  or dispose of the same,  in  violation  of the
registration  requirements of that Act. These shares may not be sold, pledged or
transferred  in the absence of an  effective  registration  statement  under the
Securities Act of 1933, as amended,  or an opinion of counsel,  which opinion is
reasonably   satisfactory  to  counsel  to  the  Company,  to  the  effect  that
registration is not required under said Act."

                  I further  agree that the  Company may place a stop order with
its Transfer  Agent,  prohibiting  the  transfer of such shares,  so long as the
legend remains on the certificates representing the shares.

                                                     Very truly yours,
<PAGE>

                                                                    EXHIBIT 11.1

                               CIDCO INCORPORATED
                        COMPUTATION OF EARNINGS PER SHARE
                    (in thousands, except per share amounts)


                                                 Three months ended March 31,
                                                 ----------------------------
                                                     1997              1996
                                                 ----------       -----------

Net income.................................      $    4,397       $     6,570
                                                 ==========       ===========

Weighted average shares outstanding........          14,078            14,176
Shares issuable on exercise of options.....             600               840
                                                   --------       -----------

Weighted average shares outstanding........          14,678            15,016
                                                 ==========       ===========

Earnings per share.........................      $     0.30       $      0.44
                                                 ==========       ===========

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
     (In thousands, except per share data; unaudited)
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   3-mos
<FISCAL-YEAR-END>                           Dec-31-1997
<PERIOD-START>                               Jan-1-1997
<PERIOD-END>                                Mar-31-1997
<CASH>                                           24,417
<SECURITIES>                                     36,060
<RECEIVABLES>                                    60,379
<ALLOWANCES>                                      3,618
<INVENTORY>                                       9,178
<CURRENT-ASSETS>                                137,537
<PP&E>                                           13,325
<DEPRECIATION>                                        0
<TOTAL-ASSETS>                                  154,900
<CURRENT-LIABILITIES>                            30,093
<BONDS>                                               0
                                 0
                                           0
<COMMON>                                            145
<OTHER-SE>                                       88,065
<TOTAL-LIABILITY-AND-EQUITY>                    154,900
<SALES>                                          77,030
<TOTAL-REVENUES>                                      0
<CGS>                                            42,783
<TOTAL-COSTS>                                         0
<OTHER-EXPENSES>                                 27,378
<LOSS-PROVISION>                                      0
<INTEREST-EXPENSE>                                    0
<INCOME-PRETAX>                                   7,328
<INCOME-TAX>                                      2,931
<INCOME-CONTINUING>                                   0
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                      4,397
<EPS-PRIMARY>                                      0.30
<EPS-DILUTED>                                      0.30
        

</TABLE>


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