SPSS INC
10-Q, 1998-05-15
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 10-Q

                QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                  For the Quarterly Period Ended March 31, 1998



                        Commission file Number: 33-64732


                                    SPSS Inc.

             (Exact name of registrant as specified in its charter)


                    Delaware                              36-2815480
           (State or other jurisdiction        (IRS Employer Identification No.)
         of incorporation or organization)

                 444 N. Michigan Avenue, Chicago, Illinois 60611
              (Address of principal executive offices and zip code)


        Registrant's telephone number including area code: (312)329-2400


         Indicate by check mark whether the registrant (1) has filed all reports
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 filing requirements
for the past 90 days. Yes X No

         As of  May 6,  1998,  there  were  9,011,605  shares  of  common  stock
outstanding, par value $.01, of the registrant.




<PAGE>




                                    SPSS Inc.
                                    Form 10-Q
                          QUARTER ENDED MARCH 31, 1998

                                      INDEX

PART I - FINANCIAL INFORMATION                                           PAGE

         Item 1.  Financial Statements

                  Independent Auditors' Review Report                       3

                  Consolidated Balance Sheets
                  as of December 31, 1997 and
                  March 31, 1998 (unaudited)                                4

                  Consolidated Statements of Income
                  for the three months ended March 31, 1997
                  (unaudited) and 1998 (unaudited)                          5

                  Consolidated Statements of Comprehensive
                  Income for the three months ended March 31, 1997
                  (unaudited) and 1998 (unaudited)                          6

                  Consolidated Statements of Cash Flows
                  for the three months ended March 31, 1997
                  (unaudited) and 1998 (unaudited)                          7

                  Notes to Consolidated Financial Statements                8

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


PART II - OTHER INFORMATION

         Item 1.  Legal Proceedings                                        12

         Item 5.  Recent Developments                                      12

         Item 6.  Exhibits and Reports on Form 8-K                         13



                                      - 2 -

<PAGE>



Item 1.           FINANCIAL STATEMENTS


                       Independent Auditors' Review Report
                       -----------------------------------


The Board of Directors
SPSS Inc.:

We have reviewed the consolidated balance sheet of SPSS Inc. and subsidiaries as
of  March  31,  1998,  and  the  related  consolidated   statements  of  income,
comprehensive income, and cash flows for the three-month periods ended March 31,
1997 and 1998. These consolidated financial statements are the responsibility of
SPSS Inc.'s management.

We conducted our review in accordance with standards established by the American
Institute  of  Certified  Public  Accountants.  A review  of  interim  financial
information consists principally of applying analytical  procedures to financial
data and making  inquiries of persons  responsible  for financial and accounting
matters. It is substantially less in scope than an audit conducted in accordance
with  generally  accepted  auditing  standards,  the  objective  of which is the
expression of an opinion  regarding the financial  statements  taken as a whole.
Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material  modifications that should
be made to the consolidated  financial statements referred to above, for them to
be in conformity with generally accepted accounting principles.

We have  previously  audited,  in accordance  with generally  accepted  auditing
standards,  the  consolidated  balance sheet of SPSS Inc. and subsidiaries as of
December  31,  1997,  and  the  related   consolidated   statements  of  income,
stockholders'  equity,  and cash flows for the year then  ended  (not  presented
herein);  and in our report dated February 18, 1998, we expressed an unqualified
opinion  on  those  consolidated  financial  statements.  In  our  opinion,  the
information  set  forth in the  accompanying  consolidated  balance  sheet as of
December 31, 1997, is fairly stated,  in all material  respects,  in relation to
the consolidated balance sheet from which it has been derived.



                                              /s/ KPMG Peat Marwick LLP

Chicago, Illinois
April 28, 1998


                                      - 3 -

<PAGE>




                           SPSS Inc. and Subsidiaries
                           CONSOLIDATED BALANCE SHEETS
                      (in thousands, except for share data)
<TABLE>
<CAPTION>

                                                                               December 31,             March 31,
                                                                                   1997                   1998
                                                                           --------------------    -------------------
                                                                                                       (unaudited)
CURRENT ASSETS:
  <S>                                                                                 <C>                     <C>     
          Cash and cash equivalents                                       $              8,079    $             8,735
          Accounts receivable, net of allowances                                        27,872                 26,889
          Inventories                                                                    2,520                  3,006
          Prepaid expenses and other current assets                                      2,811                  2,457
                                                                           --------------------    -------------------

            Total current assets                                                        41,282                 41,087
                                                                           --------------------    -------------------

EQUIPMENT AND LEASEHOLD IMPROVEMENTS, at cost:

          Land and building                                                              1,700                  1,735
          Furniture, fixtures and office equipment                                       6,044                  6,126
          Computer equipment and software                                               18,032                 19,007
          Leasehold improvements                                                         2,627                  3,449
                                                                           --------------------    -------------------

                                                                                        28,403                 30,317
          Less accumulated depreciation and amortization                                18,974                 19,852
                                                                           --------------------    -------------------

Net equipment and leasehold improvements                                                 9,429                 10,465
                                                                           --------------------    -------------------

Capitalized software development costs,
  net of accumulated amortization                                                        6,703                  7,277
Goodwill, net of accumulated amortization                                                1,062                  1,020
Deferred income tax assets                                                               2,588                  2,588
Other assets                                                                             1,681                  1,672
                                                                           --------------------    -------------------

                                                                          $             62,745    $            64,109
                                                                           ====================    ===================

CURRENT LIABILITIES:

          Notes payable                                                   $                 71    $                --
          Accounts payable                                                               5,013                  4,790
          Accrued royalties                                                                482                    392
          Accrued rent                                                                     428                    469
          Other accrued liabilities                                                      9,912                  7,984
          Income taxes and value added taxes payable                                     1,299                  2,477
          Customer advances                                                                208                    238
          Deferred revenues                                                              9,715                  8,364
                                                                           --------------------    -------------------
            Total current liabilities                                                   27,128                 24,714
                                                                           --------------------    -------------------

Deferred income taxes                                                                    1,936                  1,936
Other noncurrent liabilities                                                             1,219                  1,188

STOCKHOLDERS' EQUITY:

          Common stock, $.01 par value; 50,000,000 shares
            authorized; 8,811,644 and  8,902,513 shares issued and
            outstanding in 1997 and 1998, respectively                                      88                     89
          Additional paid-in capital                                                    44,313                 44,679
          Accumulated other comprehensive income -
            cumulative foreign currency translation adjustment                         (1,065)                  (849)
          Accumulated deficit                                                         (10,874)                (7,648)
                                                                          --------------------    -------------------
            Total stockholders' equity                                                  32,462                 36,271
                                                                           --------------------    -------------------
                                                                          $             62,745    $            64,109
                                                                           ====================    ===================
</TABLE>

          See accompanying notes to consolidated financial statements.

                                      - 4 -

<PAGE>





                           SPSS Inc. and Subsidiaries
                        CONSOLIDATED STATEMENTS OF INCOME
                      (in thousands, except for share data)
                                   (unaudited)
<TABLE>
<CAPTION>

                                                                                      Three Months Ended
                                                                                          March 31,
                                                                             ------------------------------------

                                                                                   1997               1998
                                                                             ----------------   -----------------

         Net revenues:

           <S>                                                                       <C>                 <C>     
              Desktop products                                              $         19,851    $         20,615
              Large System products                                                    4,327               4,300
              Other products and services                                              3,134               3,585
                                                                             ----------------   -----------------

         Net revenues                                                                 27,312              28,500

         Cost of revenues                                                              2,589               2,435
                                                                             ----------------   -----------------

         Gross profit                                                                 24,723              26,065
                                                                            ----------------   -----------------

         Operating expenses:

              Sales and marketing                                                     12,682              14,281
              Product development                                                      4,345               4,954
              General and administrative                                               3,266               1,785
                                                                             ----------------   -----------------

         Operating expenses                                                           20,293              21,020


         Operating income                                                              4,430               5,045
                                                                             ----------------   -----------------
         Other income (expense):

              Net interest income                                                        109                  28
              Other expense                                                             (22)               (162)
                                                                             ----------------   -----------------

         Other income (expense)                                                           87               (134)
                                                                             ----------------   -----------------

         Income before income taxes                                                    4,517               4,911

         Income tax expense                                                            1,603               1,685
                                                                             ----------------   -----------------

         Net income                                                         $          2,914    $          3,226
                                                                             ================   =================

         Basic earnings per share                                           $           0.33    $           0.36
                                                                             ================   =================

         Shares used in computing basic
            earnings per share                                                     8,735,973           8,843,934
                                                                             ================   =================

         Diluted earnings per share                                         $           0.30    $           0.34
                                                                             ================   =================

         Shares used in computing diluted
            earnings per share                                                     9,611,152           9,517,007
                                                                             ================   =================
</TABLE>


          See accompanying notes to consolidated financial statements.




                                      - 5 -

<PAGE>







                           SPSS INC. and Subsidiaries

                 CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
                                 (in thousands)
                                   (unaudited)


<TABLE>
<CAPTION>


                                                                Three Months Ended March 31,
                                                                 1997                      1998
                                                              ----------                  ------

         <S>                                                    <C>                       <C>   
         Net income                                             $2,914                    $3,226

         Other comprehensive income (loss):
           Foreign currency translation adjustment                 (58)                      216
                                                             ----------                   ------

         Comprehensive income                                   $2,856                    $3,442


</TABLE>




















          See accompanying notes to consolidated financial statements.


                                      - 6 -

<PAGE>



                           SPSS Inc. and Subsidiaries
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)
<TABLE>
<CAPTION>

                                                                                     Three Months Ended
                                                                                          March 31,
                                                                            -------------------------------------
                                                                                     1997                1998
                                                                            -----------------   -----------------

          Cash flows from operating activities:
           <S>                                                                        <C>                 <C>   
              Net income                                                   $           2,914   $           3,226
              Adjustments to reconcile net income to net cash
                (used in) provided by operating activities:
                    Depreciation and amortization                                      1,565               1,454
                    Changes in assets and liabilities, net of effects of
                        acquisitions:
                       Deferred income taxes                                          (108)                   -
                       Accounts receivable                                           (1,675)                 983
                       Inventories                                                       302               (486)
                       Accounts payable                                                1,162               (223)
                       Accrued royalties                                               (120)                (90)
                       Accrued expenses                                              (2,412)             (1,863)
                       Accrued income taxes                                            (995)               1,178
                       Other                                                         (2,657)               (918)
                                                                            -----------------   -----------------

          Net cash (used in) provided by operating activities                        (2,024)               3,261
                                                                            -----------------   -----------------

          Cash flows from investing activities:
               Capital expenditures, net                                               (505)             (1,861)
               Capitalized software development costs                                  (775)             (1,016)
               Net payments for acquisitions                                            (24)                (24)
                                                                            -----------------   -----------------

          Net cash used in investing activities                                      (1,304)             (2,901)
                                                                            -----------------   -----------------

          Cash flows from financing activities:
               Net borrowings (repayments) on notes payable                            1,506                (71)
               Net proceeds from issuance of common stock                                 20                 253
               Income tax benefit from stock option exercises                             55                 114
                                                                            -----------------   -----------------

          Net cash provided by financing activities                                    1,581                 296
                                                                            -----------------   -----------------

          Net change in cash and cash equivalents                                    (1,747)                 656
          Cash and cash equivalents at beginning of period                            13,491               8,079
                                                                            -----------------   -----------------
          Cash and cash equivalents at end of period                       $          11,744   $           8,735
                                                                            =================   =================

          Supplemental disclosures of cash flow information:
               Interest paid                                               $              79   $              78
               Income taxes paid                                                       2,956                 843
                                                                            =================   =================
</TABLE>

          See accompanying notes to consolidated financial statements.







                                      - 7 -

<PAGE>



                           SPSS Inc. and Subsidiaries
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1 - Basis of Presentation

         The accompanying  unaudited interim  consolidated  financial statements
reflect all adjustments which, in the opinion of management, are necessary for a
fair  presentation  of the results of the interim  periods  presented.  All such
adjustments are of a normal recurring nature.

         These consolidated  financial  statements should be read in conjunction
with the Company's audited  consolidated  financial statements and notes thereto
for the year ended December 31, 1997, included in the Company's Annual Report on
Form 10-K filed with the Securities and Exchange Commission.

Note 2 - Earnings Per Share

         In the fourth  quarter  of 1997,  the  Company  adopted  SFAS No.  128,
"Earnings Per Share," which established new methods for computing and presenting
earnings per share  ("EPS") and replaced the  presentation  of primary and fully
diluted EPS with basic and diluted EPS. Basic earnings per share is based on the
weighted  average number of shares  outstanding and excludes the dilutive effect
of  unexercised  common stock  equivalents.  Basic shares  outstanding  for each
period were  8,735,973  for the three months ended March 31, 1997 and  8,843,934
for the comparable  period in 1998.  Dilutive earnings per share is based on the
weighted  average number of shares  outstanding and includes the dilutive effect
of unexercised  common stock  equivalents.  Diluted shares  outstanding for each
period  were  9,611,152  shares for the three  months  ended  March 31, 1997 and
9,517,007 shares for the comparable period in 1998.


                                      - 8 -

<PAGE>





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

         The following table sets forth the  percentages  that selected items in
the Consolidated Statements of Income bear to net revenues:

<TABLE>
<CAPTION>

                                                                                  Percentage of Net Revenues
                                                                             ------------------------------------
                                                                                      Three Months Ended
                                                                                          March 31,
                                                                             ------------------------------------
                                                                                     1997               1998
                                                                             ----------------   -----------------

         Statement of Income Data:

         Net revenues:

       <S>                                                                             <C>                 <C>
              Desktop products                                                           73%                 72%
              Large System products                                                      16%                 15%
              Other products and services                                                11%                 13%
                                                                             ----------------   -----------------

         Net revenues                                                                   100%                100%

         Cost of revenues                                                                 9%                  9%
                                                                             ----------------   -----------------

         Gross profit                                                                    91%                 91%
                                                                             ----------------   -----------------

         Operating expenses:

              Sales and marketing                                                        46%                 50%
              Product development                                                        16%                 17%
              General and administrative                                                 12%                  6%
                                                                             ----------------   -----------------
         Operating expenses                                                              74%                 73%
                                                                            ----------------   -----------------

         Operating income                                                                17%                 18%

         Other income (expense):

              Net interest income (expense)                                               --                 -- 
              Other expense                                                               --                (1%)
                                                                             ----------------   -----------------
         Other income (expense)                                                           --                (1%)
                                                                             ----------------   -----------------

         Income before income taxes                                                      17%                 17%

         Income tax expense                                                               6%                  6%
                                                                             ----------------   -----------------
         Net income                                                                      11%                 11%
                                                                             ================   =================
</TABLE>


Comparison of Three Months Ended March 31, 1997 to Three Months Ended
March 31, 1998.

Net Revenues. Net Revenues were $27,312,000 and $28,500,000 for the three months
ended March 31, 1997 and 1998,  respectively,  an increase of 4%.  Revenues from
products designed for desktop computers ("Desktop  products") increased $764,000
(4%) over the  corresponding  period in 1997. In addition,  revenues from annual
license  renewals  of Desktop  products  increased  by  $500,000,  reflecting  a
$208,000 increase in annual

                                      - 9 -

<PAGE>



license  renewals  for SPSS for Windows.  Revenues  from  products  designed for
mainframes,  minicomputers,  and UNIX  workstations  ("Large  System  products")
decreased 1% over the corresponding  period in 1997. Other products and services
revenues  increased  14% due to the  increase in training  revenue and  revenues
received from publications and student products.  Revenues for the first quarter
of 1998 were adversely effected by changes in foreign currency exchange rates.

Cost of Revenues. Cost of revenues consists of costs of goods sold, amortization
of capitalized  software development costs, and royalties paid to third parties.
Cost of revenues was  $2,589,000  and $2,435,000 in the three months ended March
31, 1997 and 1998,  respectively,  a decrease of 6%. Such costs decreased due to
lower  publication cost of goods sold and lower royalties paid to third parties.
As a percentage of net revenues, cost of revenues remained constant at 9%.

Sales  and  Marketing.   Sales  and  marketing  expenses  were  $12,682,000  and
$14,281,000 in the three months ended March 31, 1997 and 1998, respectively,  an
increase of 13%.  This  increase  was due to the  expansion  of the domestic and
international  sales organizations and increased media placement and promotional
costs. Such expenses increased from 46% to 50% of net revenues.

Product Development. Product development expenses were $4,345,000 and $4,954,000
(net of capitalized  software development costs of $403,000 and $516,000) in the
three months ended March 31, 1997 and 1998, respectively, an increase of 14%. In
the  corresponding   periods  in  1997  and  1998,  the  Company's  expense  for
amortization of capitalized software and product translations,  included in cost
of revenues,  was $459,000 and $451,000,  respectively.  The increase in product
development  expenses  was  primarily  due to the  higher  cost  of  development
personnel,  additions to the product development staff, recruitment expense, and
network services expense.  As a percentage of net revenues,  product development
expenses increased from 16% to 17%, respectively.

General and Administrative.  General and administrative expenses were $3,266,000
and $1,785,000 in the three months ended March 31, 1997 and 1998,  respectively,
a decrease  of 45%.  Such  expenses  decreased  primarily  due to  reduction  in
administrative  staff  and other  efficiencies  gained  in  connection  with the
acquisitions of the Quantime Limited and In2itive  Technologies A/S entities. As
a percentage of net revenues, general and administrative expenses decreased from
12% to 6%.

Net Interest  Income.  Net interest income was $109,000 and $28,000 in the three
months  ended March 31,  1997 and 1998,  respectively,  a decrease of 74%.  This
unfavorable  variance was primarily due to lower  interest  earned on short-term
investments  resulting  from lower cash balances in the three months ended March
31,1998 compared to March 31, 1997.

Other  (Expense).  Other  (expense) was ($22,000) and  ($162,000)  for the three
months ended March 31, 1997 and 1998, respectively. Such transactions consist of
foreign currency transaction losses.


                                     - 10 -

<PAGE>



Provision  for Income  Taxes.  Provision  for income  taxes was  $1,603,000  and
$1,685,000  for the three  months  ended March 31, 1997 and 1998,  respectively,
reflecting effective tax rates of 35.5% and 34.3%, respectively.

Liquidity and Capital Resources

The Company had no  long-term  debt as of March 31, 1998 and held  approximately
$8,735,000 in cash and cash equivalents.

Funds in the first three months of 1998 were used in operations and for payments
related  to  the  Company's   acquisition  of  Quantime   Limited  and  In2itive
Technologies  A/S.  Capital  expenditures  included,  among  other  things,  new
computer  systems  for  use  in  internal  product   development  and  leasehold
improvements  and  furnishings  for the  Company's new office space in the Sears
Tower in Chicago, Illinois.

The Company currently has an available  $5,000,000 unsecured line of credit with
Bank of America N.T.S.A. ("B of A"), under which borrowings bear interest at the
reference  rate  (currently  8.50%).  As of March 31,  1998,  the Company had no
borrowings under this line of credit. The Company's credit agreement with B of A
requires  the  Company to comply with  certain  specified  financial  ratios and
tests,  and,  among other things,  restricts  the  Company's  ability to (i) pay
dividends  or make  distributions,  (ii) incur  additional  indebtedness,  (iii)
create  liens  on  assets,  (iv)  make  investments,   (v)  engage  in  mergers,
acquisitions  or  consolidations,  (vi) sell assets and (vii)  engage in certain
transactions with affiliates.

The  Company  anticipates  that  amounts  available  under  its line of  credit,
existing  sources of liquidity and cash flows  generated from operations will be
sufficient to fund the Company's  operations  and capital  requirements  for the
foreseeable  future.  However,  no assurance can be given that changing business
circumstances  will not require  additional  capital  for  reasons  that are not
currently  anticipated  or that the  necessary  additional  capital will then be
available to the Company on favorable terms, or at all.


                                     - 11 -

<PAGE>




International Operations

Significant growth in the Company's  international  operations  continued during
the first quarter of 1998. The portion of revenues attributable to international
operations  was  negatively  affected  by changes in foreign  currency  exchange
rates. Net corporate  revenues  increased 4% in the three months ended March 31,
1998, when compared to the three months ended March 31, 1997. Net of the effects
of changes in foreign currency rates, the increase would have been approximately
7%.

Safe Harbor

"Safe Harbor"  Statement under the Private  Securities  Litigation Reform Act of
1995: Certain statements in this report constitute "forward-looking  statements"
within the meaning of Section 21E of the Securities and Exchange Act of 1934, as
amended (the "Exchange  Act").  Such statements  involve known and unknown risks
and uncertainties  which may cause the Company's actual results,  performance or
achievements,  or industry results,  to be materially  different than any future
results,  performance  or  achievements  expressed  or  implied  in or  by  such
forward-looking  statements.  By way of example and not limitation,  known risks
and  uncertainties  include the Company's  ability to successfully  integrate or
improve the performance of acquired  businesses,  change in market conditions or
product  demand,  competition  and  currency  fluctuations,  changes  in product
release schedules and product acceptance.  In light of these and other risks and
uncertainties, the inclusion of forward-looking statements in this report should
not be regarded as a  representation  by the  Company  that any future  results,
performance or achievements will be attained.


                           PART II - OTHER INFORMATION

Item 1.           Legal Proceedings

Currently there are no material  pending legal  proceedings to which the Company
or any of its  subsidiaries  is a party or to which  any of  their  property  is
subject.

Item 5.           Recent Developments

The  Company  is  currently  under  negotiations  to renew  its  agreement  with
Prentice-Hall, Inc.



                                      -12-

<PAGE>


Item 6.           Exhibits and Reports on Form 8-K.

     (a)  Exhibits  (Note:   Management  contracts  and  compensatory  plans  or
arrangements are underlined in the following list.)


<TABLE>
<CAPTION>

                                                                                        Incorporation
 Exhibit                                                                                 by Reference
 Number            Description of Document                                               (if applicable)
 ------            -----------------------                                               ---------------

  <S>                <C>                                                                     <C>
   3.1            Certificate of Incorporation of the Company                                *   3.2

   3.2            By-Laws of the Company                                                     *   3.4

   4.1            Second Amendment to Credit Agreement                                      **   4.3

  10.1            Change of Control Agreement between SPSS Inc.
                  and Jack Noonan

  10.2            Change of Control Agreement between SPSS Inc.
                  and Edward Hamburg

  10.3            Change of Control Agreement between SPSS Inc.
                  and Louise Rehling

  10.4            Change of Control Agreement between SPSS Inc.
                  and Susan Phelan

  10.5            Change of Control Agreement between SPSS Inc.
                  and Mark Battaglia

  10.6            Change of Control Agreement between SPSS Inc.
                  and Ian Durrell

  10.7            Consulting Agreement                                                    **  10.22

  15.1            Acknowledgment of Independent Certified
                  Public Accountants Regarding Independent
                  Auditors' Review Report

  27.1            Financial Data Schedule

  27.1a           Financial Data Schedule

</TABLE>

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

*    Previously filed with Amendment No. 2 to Form S-1 Registration Statement of
     SPSS Inc. filed on August 4, 1993 (Registration No. 33-64732)

**   Previously  filed with SPSS' Annual  Report on Form 10-K for the Year Ended
     December 31, 1997


                                     - 13 -

<PAGE>



         (b)      Reports on Form 8-K

                  There were no reports on Form 8-K filed by the Company  during
                  the fiscal quarter ended March 31, 1998



                                     - 14 -

<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.


                                          SPSS Inc.



Date:   May 15, 1998                      By:  /s/ Jack Noonan
                                          --------------------
                                          Jack Noonan
                                          President and Chief Executive Officer


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
this report has been signed by the undersigned, in his capacity as the principal
financial officer of the Registrant.


Date:    May 15, 1998                     By:  /s/ Edward Hamburg
                                          -----------------------
                                          Edward Hamburg
                                          Executive Vice-President, Corporate
                                          Operations and Chief Financial Officer




                                     - 15 -

<PAGE>




                                  EXHIBIT INDEX

<TABLE>
<CAPTION>

Exhibit                                                                           Sequential Page
Number            Description of Document                                               Number
- ------            -----------------------                                         ---------------


<S>               <C>                                                                      <C>
10.1              Change of Control Agreement between SPSS Inc.                             18
                  and Jack Noonan

10.2              Change of Control Agreement between SPSS Inc.                             25
                  and Edward Hamburg

10.3              Change of Control Agreement between SPSS Inc.                             32
                  and Louise Rehling

10.4              Change of Control Agreement between SPSS Inc.                             39
                  and Susan Phelan

10.5              Change of Control Agreement between SPSS Inc.                             46
                  and Mark Battaglia

10.6              Change of Control Agreement between SPSS Inc.                             53
                  and Ian Durrell

15.1              Acknowledgement of Independent Certified Public                           60
                  Accountants Regarding Independent Auditors' Review
                  Report

27.1              Financial Data Schedule                                                   61

27.1a             Financial Data Schedule                                                   62

</TABLE>


                                     - 16 -


                                                                    EXHIBIT 10.1


                                SENIOR MANAGEMENT
                       CHANGE OF CONTROL AGREEMENT BETWEEN
                                 JACK NOONAN AND
                                    SPSS INC.


     THIS  CHANGE  OF  CONTROL   AGREEMENT,   dated  as  of  May  1,  1998  (the
"Agreement"),  is by and between  SPSS Inc., a Delaware  corporation  having its
principal offices at 444 N. Michigan Avenue, Chicago,  Illinois 60611 ("SPSS" or
the  "Company"),  and  Jack_Noonan,  a senior  management  employee of SPSS (the
"Employee").

     WHEREAS,  the  Employee is  presently  serving as the  President  and Chief
Executive Officer of SPSS; and

     WHEREAS,  SPSS desires to continue the Employee's services as President and
Chief Executive  Officer and to provide the Employee with the benefits set forth
herein in consideration of the Employee's continued employment, and the Employee
is willing to continue his employment as an employee of SPSS and enter into this
Agreement on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
conditions  contained  herein and other  good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
agree as follows:

     1. Certain Defined Terms.

     (a)  "Cause"  shall mean  material  nonperformance  by the  Employee of the
Employee's  duties or material  injury or harm to the  Company or its  successor
caused by the Employee.

     (b) "Change of Control," as used herein,  shall mean any one or more of the
following: (i) the accumulation,  by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of 1934,
as amended  (the  "Exchange  Act")) not  previously  owning  common stock of the
Company,  of Fifteen Percent (15%) or more of the shares of the then outstanding
common  stock  of SPSS  (the  "Outstanding  Common  Stock"),  (ii) a  merger  or
consolidation  of SPSS in which SPSS does not survive as an  independent  public
company,  (iii) a sale of all or substantially all of the assets of SPSS, (iv) a
triggering event under any Rights Agreement of SPSS, as such agreement may exist
from  time to time,  or (v) a  liquidation  or  dissolution  of SPSS;  provided,
however,  that the  following  acquisitions  shall  not  constitute  a Change of
Control for the purposes of this


<PAGE>


subsection  (a): (i) any  acquisition of common stock or securities  convertible
into common stock directly from SPSS, or (ii) any acquisition of common stock or
securities  convertible  into  common  stock by any  employee  benefit  plan (or
related trust) sponsored or maintained by SPSS.

     (c) "Constructive Termination," as used herein, shall mean (i) a reduction,
for a reason other than Cause,  in annualized  cash  compensation by 20% or more
(compared to the cash  compensation  which the  Employee  received in the fiscal
year  immediately  preceding  the  year of the  Effective  Date of a  Change  of
Control)  which occurs during any twelve month period  beginning on or after the
Effective Date of any Change of Control referred to above and ending on or prior
to the later of (x) the second  anniversary  date of the  Effective  Date of any
Change of Control  referred to above or (y) the last day of vesting for any SPSS
options  then  held by the  Employee  which  options  have not  vested as of the
Effective  Date of any Change of Control  referred to above;  or (ii) any action
(an  "Action"),  for a reason  other  than  Cause,  by SPSS  which  results in a
diminution in any material respect of the Employee's position, authority, duties
or  responsibilities as the same existed immediately prior to the Effective Date
of the Change of Control  referred  to above.  Further,  in order for it to be a
Constructive  Termination,  either  (i) or (ii) above  must be  followed  within
ninety (90) days with the resignation of the Employee.

     A change in the Employee's  title or a transfer to a different  division or
subsidiary,  whether  publicly  or  privately  held,  shall not in and of itself
constitute an Action. Rather, the focus turns on the substance of the Employee's
duties.

     (d)  "Effective  Date," as used  herein,  shall mean the first date  during
which a Change of Control (as defined in Section 1(b)) occurs.

     2. Change of Control in a Transaction with a Private Company.  In the event
a Change of Control  occurs as the result of a  transaction  between  SPSS and a
company whose common stock is not publicly  traded on a domestic  national stock
exchange,  the  NASDAQ  national  market,  or  their  respective  successors  or
equivalents  (a  "Private  Company"),  the  Employee  shall  have the rights and
benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence  of Change of  Control
between  SPSS and a  Private  Company,  the  Employee  is  hired  for at least a
one-year period,  with an employment package equal to or greater than the larger
of (i) the total cash  compensation  received by the Employee in the immediately
preceding full fiscal year or (ii) two times the Employee's base salary received
in the  immediately  preceding  fiscal year, all of Employee stock options shall
vest on the  Effective  Date on which the Change of Control  occurs and shall be
cashed out at the transaction  value on the occurrence of the  transaction  with
the Private Company on or within ninety (90) days following a Change of Control.
If Employee  shall be hired with an employment  package equal to or greater than
the  larger of (i) the total  cash  compensation  received  by  Employee  in the
preceding  fiscal year or (ii) two times the Employee's  base salary received in
the immediately preceding fiscal year, Employee

                                      - 2 -

<PAGE>


shall  receive an employment  agreement  which  provides for the following  upon
involuntary  termination  without cause or  Constructive  Termination  after the
Effective  Date of the  Change of Control  and  within  two (2) years  after the
Change of  Control:  (1) a  severance  package  equal to the  greater of (i) the
aggregate cash compensation received in the immediately preceding fiscal year or
(ii) two times the Employee's base salary received in the immediately  preceding
fiscal year; and (2) in the event of a Constructive  Termination,  the option to
terminate  employment while still receiving the severance package referred to in
2(a)(1)  above.  If  Employee  is hired for a period of less than one year,  the
provisions of Constructive Termination apply.

     (b)  Involuntary  Termination;  Constructive  Termination  Upon a Change of
Control.  If upon the occurrence of Change of Control between SPSS and a Private
Company, there is either an involuntary termination of Employee without Cause or
Constructive  Termination,  the vesting of all Employee  stock  options shall be
accelerated  to the  Effective  Date on which the Change of  Control  occurs and
shall  be  cashed  out  at  the  transaction  value  on  the  occurrence  of the
transaction  with the  Private  Company on or within  ninety  (90) days from the
occurrence  of the  Change of  Control.  Employee  shall  receive a one (1) year
severance  package equal to the greater of (i) the Employee's cash  compensation
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the fiscal year immediately preceding the year of the Effective Date of a Change
of Control.

     (c)  Voluntary  Resignation.  If upon the  occurrence  of Change of Control
between  SPSS  and a  Private  Company,  Employee  voluntarily  resigns,  all of
Employee's  unvested SPSS stock options shall be forfeited and all of Employee's
vested options shall be cashed out at the transaction value on the occurrence of
the transaction with the Private Company on or within ninety (90) days following
a Change of Control.

     3. Change of Control in a Transaction With a Public Company. In the event a
Change of  Control  occurs  between  SPSS and a company  whose  common  stock is
publicly  traded on the domestic  national stock  exchange,  the NASDAQ national
market, or their respective successors and equivalents (a "Public Company"), the
Employee shall have the rights and benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence of a Change of Control
between SPSS and a Public Company, the Employee is hired for at least a one-year
period,  with an  employment  package equal to or greater than the larger of (i)
the  total  cash  compensation  received  by the  Employee  in  the  immediately
preceding  year or (ii) two times the  Employee's  base  salary  received in the
immediately  preceding fiscal year, all of Employee's stock options shall either
(i) vest on the Effective  Date on which the Change of Control  occurs and shall
be cashed out at the transaction value on or within ninety (90) days following a
Change  of  Control;  or (ii)  shall be  converted  into  stock  options  of the
acquiring   Public   Company  on   substantially   equivalent   economic   terms
("Replacement Options"). If Replacement Options are granted, they shall continue
to vest at the same rate as under the

                                      - 3 -

<PAGE>



SPSS Option Plan prior to the Change of Control.  If Employee shall be hired for
at least a one-year  period,  by the acquiring Public Company with an employment
package  equal to or greater than the larger of (i) the total cash  compensation
which Employee received in the fiscal year immediately preceding the year of the
Effective  Date of a Change of  Control  or (ii) two times the  Employee's  base
salary received in the immediately preceding fiscal year, Employee shall receive
an employment  agreement  which provides the following upon the occurrence of an
involuntary  termination  without Cause or  Constructive  Termination  after the
Effective  Date of the  Change of Control  and  within  two (2) years  after the
Change of  Control:  (1) a  severance  package  equal to the  greater of (i) the
aggregate cash compensation received in the immediately preceding fiscal year or
(ii) two times the Employee's base salary received in the immediately  preceding
fiscal  year;  (2)  immediate  accelerated  vesting of all  previously  unvested
Replacement  Options;  and (3) in the event of a Constructive  Termination,  the
option to terminate  employment  while still  receiving  the  severance  package
referred  to in 3(a)(i)  above.  If Employee is hired for a period less than one
year, the provisions of Constructive Termination apply.

     If a Constructive  Termination or an involuntary  Termination without Cause
occurs two (2) years or more after the  Effective  Date of a Change of  Control,
the vesting of all previously unvested  Replacement Options shall be accelerated
to the date on which the Employee is subject to a  Constructive  Termination  or
involuntary termination.

     (b)  Involuntary  Termination/Constructive  Termination  Upon a  Change  of
Control.  If,  upon the  occurrence  of a Change of Control  between  SPSS and a
Public Company there is either an involuntary termination of an Employee without
Cause or a  Constructive  Termination  of  Employee,  (i) the  vesting of all of
Employee's stock options shall be accelerated to the Effective Date on which the
Change of  Control  occurs,  and shall be cashed  out at the  Change of  Control
transaction  value or must be exercised by Employee within ninety (90) days from
the  occurrence  of a Change of Control (if there is a Change of Control with no
transaction)  and (ii) Employee shall receive a one (1) year  severance  package
equal to the  greater of (A) the cash  compensation  received by Employee in the
fiscal year immediately  preceding the year of the Effective Date of a Change of
Control or (B) two times the Employee's  base salary received in the fiscal year
immediately preceding the year of the Effective Date of a Change of Control.

     (c) Voluntary Resignation on Change of Control. If upon the occurrence of a
Change  of  Control  between  SPSS and a Public  Company,  Employee  voluntarily
resigns,  at the  time of the  Effective  Date of the  Change  of  Control,  all
unvested SPSS stock options held by Employee shall be forfeited,  and all vested
options shall be cashed out at the Change of Control  transaction  value or must
be exercised by Employee  within  ninety (90) days from the  occurrence  of such
Change of Control (if there is a Change of Control with no transaction).

     4. Health and Welfare Benefits.  Notwithstanding the rights and obligations
as outlined in Sections 2 or 3 above, if Employee is involuntarily terminated

                                      - 4 -


<PAGE>


without  Cause or is  subject  to a  Constructive  Termination  on or after  the
Effective  Date of a Change  of  Control  or  within  the later of two (2) years
following the Effective  Date of a Change of Control in addition to the benefits
set forth above in Sections 2 and 3, the Employee shall continue to receive,  at
the cost of the employer, the same health and welfare benefits (in effect at any
time one hundred  twenty (120) days prior to the  Effective  Date of a Change of
Control),  but only to the extent each plan which  governs the benefits  permits
participation  by  terminated  employees,  for a period of eighteen  (18) months
following the date of  involuntary  termination  without  Cause or  Constructive
Termination.

     5. Non-Compete.

     (a) Employee hereby  covenants and agrees that during the period of time he
collects a severance package,  he shall not (i) directly or indirectly  (whether
through a  partnership  of which the  Employee is a partner or through any other
individual or entity in which  Employee has any interest,  legal or  equitable),
engage in any business  competitive  with the business of SPSS (ii)  directly or
indirectly  (whether  through a  partnership  of which  Employee is a partner or
through any other individual or entity in which Employee has any interest, legal
or  equitable),  solicit or  otherwise  engage with any  customers or clients of
SPSS,  in any  transactions  which are in direct  competition  with the software
business of SPSS which SPSS did or could have engaged in with those customers or
clients, or (iii) directly or indirectly (whether through a partnership of which
Employee  is a  partner  or  through  any  other  individual  or entity in which
Employee  has any  interest,  legal or  equitable),  assist  any  person  in the
development,  programming, servicing, maintenance, manufacture, sale, licensing,
distribution or marketing (including,  without limitation, giving away software)
of software and related  products in competition  with SPSS'  products,  in each
case  in the  United  States  of  America  or any  country  where  SPSS,  or its
subsidiaries  or affiliates are doing business with respect to SPSS products and
services and in each case excluding  passive  investment  interests of less than
two percent (2%) in corporations  whose stock is registered under the Securities
Exchange Act of 1934, as amended.

     (b) Employee  understands  that a breach by him of this Section 5 may cause
substantial injury to SPSS, which may be irreparable and/or in amounts difficult
or impossible to ascertain, and that in the event Employee breaches this Section
5, SPSS shall have, in addition to all other remedies  available in the event of
a breach of this Agreement,  the right to injunctive or other equitable  relief.
Further,  Employee acknowledges and agrees that the restrictions and commitments
set forth in this Agreement are necessary to protect SPSS' legitimate  interests
and are  reasonable  in  scope,  area  and  time,  and  that  if,  despite  this
acknowledgment and agreement, at the time of the enforcement of any provision of
this Agreement a court of competent  jurisdiction  shall hold that the period or
scope of such provision is unreasonable  under the circumstances  then existing,
the  maximum  reasonable  period  or scope  under  such  circumstances  shall be
substituted for the period or scope stated in such provision.


                                      - 5 -


<PAGE>


     (c) Should  Employee  breach this Section 5, all severance  payments  shall
cease  immediately,  and SPSS shall be  entitled  to pursue all other  available
legal or equitable remedies.

     (d) For  purposes of Section 5, where the context  admits,  the term "SPSS"
includes SPSS Inc.,  its  subsidiaries  and all of their  respective  affiliated
entities and their successors and assigns.

     6.  Governing  Law.  This  Agreement  shall be governed by and construed in
accordance with the laws of the State of Illinois  applicable to agreements made
and to be  performed  in  Illinois,  without  giving  effect to conflicts of law
principles.

     7. Headings.  The section headings of this Agreement are for reference only
and are to be given no  effect in the  construction  or  interpretation  of this
Agreement. 8. Severability.  If any part or provision of this Agreement shall be
declared  invalid or unenforceable  by a court of competent  jurisdiction,  said
provision  or part  shall be  ineffective  to the extent of such  invalidity  or
unenforceability  only,  without in any way  affecting  the  remaining  parts or
provisions of this Agreement.

     9. Waiver.  Any party may waive compliance by another party with any of the
provisions of this Agreement. No waiver of any provision shall be construed as a
waiver of any other provision. Any waiver must be in writing.

     10. Binding  Effect;  Assignment.  This  Agreement  shall be binding on and
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted assigns. Nothing in this Agreement shall create or be deemed to create
any third  party  beneficiary  rights in any  person  or entity  (including  any
employee  or  person  engaged  by SPSS  in any  capacity)  not a  party  to this
Agreement.  SPSS will require any  successor  (whether  direct or  indirect,  by
merger,  purchase,  consolidation  or  otherwise)  of SPSS  to  make an  express
assumption of the obligations  hereunder and cause any successor (whether direct
or indirect, by merger,  purchase,  consolidation or otherwise) of SPSS to agree
to perform all parts and provisions  under this Agreement in the same manner and
to the  same  extent  that  SPSS  would be  required  to  perform  it if no such
succession had taken place.

     11.   Counterparts.   This  Agreement  may  be  signed  in  any  number  of
counterparts and all such  counterparts  shall be read together and construed as
but one and the same document.

     12.  Notices.  All notices and other  communications  under this  Agreement
shall be in writing and shall be deemed given when delivered personally, one day
after sent by recognized  overnight  courier,  or five (5) days after deposit in
the United States mail,  postage prepaid,  registered or certified mail,  return
receipt requested,  to the parties at the following  addresses (or to such other
address as a party may have specified by notice duly given to the other party in
accordance with this provision):

                                      - 6 -


<PAGE>


     If to the Employee:

     At the Employee's  then current  business or residence  address as shown on
the records of SPSS,  with a copy to such other  person as the Employee may have
specified by notice duly given to SPSS in accordance with this provision.

     If to SPSS:

                           SPSS Inc.
                           444 N. Michigan Avenue
                           Chicago, Illinois 60611

                           Attention: Chairman

     With a copy to:

                           Ross & Hardies
                           150 N. Michigan Avenue
                           Chicago, Illinois 60601-7567

                           Attention:  Lawrence R. Samuels, Esq.


     IN WITNESS  WHEREOF the parties have  executed  this  Agreement on the date
first written above.

                                                     Employee

                                                     /s/JACK NOONAN
                                                     Jack Noonan


                                                     SPSS Inc.


                                                     By:/s/NORMAN NIE
                                                     Name:  Norman Nie
                                                     Its:     Chairman


                                      - 7 -




                                                                    EXHIBIT 10.2

                                SENIOR MANAGEMENT
                       CHANGE OF CONTROL AGREEMENT BETWEEN
                               EDWARD HAMBURG AND
                                    SPSS INC.


     THIS  CHANGE  OF  CONTROL   AGREEMENT,   dated  as  of  May  1,  1998  (the
"Agreement"),  is by and between  SPSS Inc., a Delaware  corporation  having its
principal offices at 444 N. Michigan Avenue, Chicago,  Illinois 60611 ("SPSS" or
the "Company"),  and Edward Hamburg,  a senior management  employee of SPSS (the
"Employee").

     WHEREAS,  the Employee is presently serving as the Executive Vice President
of SPSS; and

     WHEREAS, SPSS desires to continue the Employee's services as Executive Vice
President  and to provide the  Employee  with the  benefits  set forth herein in
consideration  of the  Employee's  continued  employment,  and the  Employee  is
willing to continue  his  employment  as an employee of SPSS and enter into this
Agreement on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
conditions  contained  herein and other  good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
agree as follows:

     1. Certain Defined Terms.

     (a)  "Cause"  shall mean  material  nonperformance  by the  Employee of the
Employee's  duties or material  injury or harm to the  Company or its  successor
caused by the Employee.

     (b) "Change of Control," as used herein,  shall mean any one or more of the
following: (i) the accumulation,  by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of 1934,
as amended  (the  "Exchange  Act")) not  previously  owning  common stock of the
Company,  of Fifteen Percent (15%) or more of the shares of the then outstanding
common  stock  of SPSS  (the  "Outstanding  Common  Stock"),  (ii) a  merger  or
consolidation  of SPSS in which SPSS does not survive as an  independent  public
company,  (iii) a sale of all or substantially all of the assets of SPSS, (iv) a
triggering event under any Rights Agreement of SPSS, as such agreement may exist
from  time to time,  or (v) a  liquidation  or  dissolution  of SPSS;  provided,
however,  that the  following  acquisitions  shall  not  constitute  a Change of
Control for the purposes of this  subsection  (a): (i) any acquisition of common
stock or securities  convertible  into common stock  directly from SPSS, or (ii)
any acquisition of common stock or securities  convertible  into common stock by
any employee benefit plan (or related trust) sponsored or maintained by SPSS.

<PAGE>


     (c) "Constructive Termination," as used herein, shall mean (i) a reduction,
for a reason other than Cause,  in annualized  cash  compensation by 20% or more
(compared to the cash  compensation  which the  Employee  received in the fiscal
year  immediately  preceding  the  year of the  Effective  Date of a  Change  of
Control)  which occurs during any twelve month period  beginning on or after the
Effective Date of any Change of Control referred to above and ending on or prior
to the later of (x) the second  anniversary  date of the  Effective  Date of any
Change of Control  referred to above or (y) the last day of vesting for any SPSS
options  then  held by the  Employee  which  options  have not  vested as of the
Effective  Date of any Change of Control  referred to above;  or (ii) any action
(an  "Action"),  for a reason  other  than  Cause,  by SPSS  which  results in a
diminution in any material respect of the Employee's position, authority, duties
or  responsibilities as the same existed immediately prior to the Effective Date
of the Change of Control  referred  to above.  Further,  in order for it to be a
Constructive  Termination,  either  (i) or (ii) above  must be  followed  within
ninety (90) days with the resignation of the Employee.

     A change in the Employee's  title or a transfer to a different  division or
subsidiary,  whether  publicly  or  privately  held,  shall not in and of itself
constitute an Action. Rather, the focus turns on the substance of the Employee's
duties.

     (d)  "Effective  Date," as used  herein,  shall mean the first date  during
which a Change of Control (as defined in Section 1(b)) occurs.

     2. Change of Control in a Transaction with a Private Company.  In the event
a Change of Control  occurs as the result of a  transaction  between  SPSS and a
company whose common stock is not publicly  traded on a domestic  national stock
exchange,  the  NASDAQ  national  market,  or  their  respective  successors  or
equivalents  (a  "Private  Company"),  the  Employee  shall  have the rights and
benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence  of Change of  Control
between  SPSS and a  Private  Company,  the  Employee  is  hired  for at least a
one-year period,  with an employment package equal to or greater than the larger
of (i) the total cash  compensation  received by the Employee in the immediately
preceding full fiscal year or (ii) two times the Employee's base salary received
in the  immediately  preceding  fiscal year, all of Employee stock options shall
vest on the  Effective  Date on which the Change of Control  occurs and shall be
cashed out at the transaction  value on the occurrence of the  transaction  with
the Private Company on or within ninety (90) days following a Change of Control.
If Employee  shall be hired with an employment  package equal to or greater than
the  larger of (i) the total  cash  compensation  received  by  Employee  in the
preceding  fiscal year or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year,  Employee  shall receive an employment
agreement which provides for the following upon involuntary  termination without
cause or  Constructive  Termination  after the  Effective  Date of the Change of
Control and within two (2) years  after the Change of  Control:  (1) a severance
package equal to the greater of (i) the aggregate cash compensation  received in
the  immediately  preceding  fiscal year or (ii) two times the  Employee's  base
salary received in the immediately

                                      - 2 -


<PAGE>


preceding fiscal year; and (2) in the event of a Constructive  Termination,  the
option to terminate  employment  while still  receiving  the  severance  package
referred to in 2(a)(1) above. If Employee is hired for a period of less than one
year, the provisions of Constructive Termination apply.

     (b)  Involuntary  Termination;  Constructive  Termination  Upon a Change of
Control.  If upon the occurrence of Change of Control between SPSS and a Private
Company, there is either an involuntary termination of Employee without Cause or
Constructive  Termination,  the vesting of all Employee  stock  options shall be
accelerated  to the  Effective  Date on which the Change of  Control  occurs and
shall  be  cashed  out  at  the  transaction  value  on  the  occurrence  of the
transaction  with the  Private  Company on or within  ninety  (90) days from the
occurrence  of the  Change of  Control.  Employee  shall  receive a one (1) year
severance  package equal to the greater of (i) the Employee's cash  compensation
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the fiscal year immediately preceding the year of the Effective Date of a Change
of Control.

     (c)  Voluntary  Resignation.  If upon the  occurrence  of Change of Control
between  SPSS  and a  Private  Company,  Employee  voluntarily  resigns,  all of
Employee's  unvested SPSS stock options shall be forfeited and all of Employee's
vested options shall be cashed out at the transaction value on the occurrence of
the transaction with the Private Company on or within ninety (90) days following
a Change of Control.

     3. Change of Control in a Transaction With a Public Company. In the event a
Change of  Control  occurs  between  SPSS and a company  whose  common  stock is
publicly  traded on the domestic  national stock  exchange,  the NASDAQ national
market, or their respective successors and equivalents (a "Public Company"), the
Employee shall have the rights and benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence of a Change of Control
between SPSS and a Public Company, the Employee is hired for at least a one-year
period,  with an  employment  package equal to or greater than the larger of (i)
the  total  cash  compensation  received  by the  Employee  in  the  immediately
preceding  year or (ii) two times the  Employee's  base  salary  received in the
immediately  preceding fiscal year, all of Employee's stock options shall either
(i) vest on the Effective  Date on which the Change of Control  occurs and shall
be cashed out at the transaction value on or within ninety (90) days following a
Change  of  Control;  or (ii)  shall be  converted  into  stock  options  of the
acquiring   Public   Company  on   substantially   equivalent   economic   terms
("Replacement Options"). If Replacement Options are granted, they shall continue
to vest at the same rate as under the SPSS  Option  Plan  prior to the Change of
Control.  If  Employee  shall be hired for at least a  one-year  period,  by the
acquiring Public Company with an employment package equal to or greater than the
larger of (i) the total cash compensation  which Employee received in the fiscal
year immediately preceding the year of the Effective Date of a Change of Control
or (ii) two  times  the  Employee's  base  salary  received  in the  immediately
preceding fiscal year,

                                      - 3 -


<PAGE>


Employee shall receive an employment agreement which provides the following upon
the  occurrence of an  involuntary  termination  without  Cause or  Constructive
Termination after the Effective Date of the Change of Control and within two (2)
years after the Change of Control:  (1) a severance package equal to the greater
of (i) the aggregate cash  compensation  received in the  immediately  preceding
fiscal  year or (ii) two  times  the  Employee's  base  salary  received  in the
immediately  preceding  fiscal year;  (2) immediate  accelerated  vesting of all
previously unvested  Replacement Options; and (3) in the event of a Constructive
Termination,  the option to  terminate  employment  while  still  receiving  the
severance  package  referred  to in 3(a)(i)  above.  If  Employee is hired for a
period less than one year, the provisions of Constructive Termination apply.

     If a Constructive  Termination or an involuntary  Termination without Cause
occurs two (2) years or more after the  Effective  Date of a Change of  Control,
the vesting of all previously unvested  Replacement Options shall be accelerated
to the date on which the Employee is subject to a  Constructive  Termination  or
involuntary termination.

     (b)  Involuntary  Termination/Constructive  Termination  Upon a  Change  of
Control.  If,  upon the  occurrence  of a Change of Control  between  SPSS and a
Public Company there is either an involuntary termination of an Employee without
Cause or a  Constructive  Termination  of  Employee,  (i) the  vesting of all of
Employee's stock options shall be accelerated to the Effective Date on which the
Change of  Control  occurs,  and shall be cashed  out at the  Change of  Control
transaction  value or must be exercised by Employee within ninety (90) days from
the  occurrence  of a Change of Control (if there is a Change of Control with no
transaction)  and (ii) Employee shall receive a one (1) year  severance  package
equal to the  greater of (A) the cash  compensation  received by Employee in the
fiscal year immediately  preceding the year of the Effective Date of a Change of
Control or (B) two times the Employee's  base salary received in the fiscal year
immediately preceding the year of the Effective Date of a Change of Control.

     (c) Voluntary Resignation on Change of Control. If upon the occurrence of a
Change  of  Control  between  SPSS and a Public  Company,  Employee  voluntarily
resigns,  at the  time of the  Effective  Date of the  Change  of  Control,  all
unvested SPSS stock options held by Employee shall be forfeited,  and all vested
options shall be cashed out at the Change of Control  transaction  value or must
be exercised by Employee  within  ninety (90) days from the  occurrence  of such
Change of Control (if there is a Change of Control with no transaction).

     4. Health and Welfare Benefits.  Notwithstanding the rights and obligations
as outlined in Sections 2 or 3 above,  if Employee is  involuntarily  terminated
without  Cause or is  subject  to a  Constructive  Termination  on or after  the
Effective  Date of a Change  of  Control  or  within  the later of two (2) years
following the Effective  Date of a Change of Control in addition to the benefits
set forth above in Sections 2 and 3, the Employee shall continue to receive,  at
the cost of the employer, the same health and welfare benefits (in effect at any
time one hundred twenty (120) days prior to the Effective Date of a

                                      - 4 -


<PAGE>


Change of Control),  but only to the extent each plan which governs the benefits
permits  participation  by terminated  employees,  for a period of eighteen (18)
months  following  the  date  of  involuntary   termination   without  Cause  or
Constructive Termination.

     5. Non-Compete.

     (a) Employee hereby  covenants and agrees that during the period of time he
collects a severance package,  he shall not (i) directly or indirectly  (whether
through a  partnership  of which the  Employee is a partner or through any other
individual or entity in which  Employee has any interest,  legal or  equitable),
engage in any business  competitive  with the business of SPSS (ii)  directly or
indirectly  (whether  through a  partnership  of which  Employee is a partner or
through any other individual or entity in which Employee has any interest, legal
or  equitable),  solicit or  otherwise  engage with any  customers or clients of
SPSS,  in any  transactions  which are in direct  competition  with the software
business of SPSS which SPSS did or could have engaged in with those customers or
clients, or (iii) directly or indirectly (whether through a partnership of which
Employee  is a  partner  or  through  any  other  individual  or entity in which
Employee  has any  interest,  legal or  equitable),  assist  any  person  in the
development,  programming, servicing, maintenance, manufacture, sale, licensing,
distribution or marketing (including,  without limitation, giving away software)
of software and related  products in competition  with SPSS'  products,  in each
case  in the  United  States  of  America  or any  country  where  SPSS,  or its
subsidiaries  or affiliates are doing business with respect to SPSS products and
services and in each case excluding  passive  investment  interests of less than
two percent (2%) in corporations  whose stock is registered under the Securities
Exchange Act of 1934, as amended.

     (b) Employee  understands  that a breach by him of this Section 5 may cause
substantial injury to SPSS, which may be irreparable and/or in amounts difficult
or impossible to ascertain, and that in the event Employee breaches this Section
5, SPSS shall have, in addition to all other remedies  available in the event of
a breach of this Agreement,  the right to injunctive or other equitable  relief.
Further,  Employee acknowledges and agrees that the restrictions and commitments
set forth in this Agreement are necessary to protect SPSS' legitimate  interests
and are  reasonable  in  scope,  area  and  time,  and  that  if,  despite  this
acknowledgment and agreement, at the time of the enforcement of any provision of
this Agreement a court of competent  jurisdiction  shall hold that the period or
scope of such provision is unreasonable  under the circumstances  then existing,
the  maximum  reasonable  period  or scope  under  such  circumstances  shall be
substituted for the period or scope stated in such provision.

     (c) Should  Employee  breach this Section 5, all severance  payments  shall
cease  immediately,  and SPSS shall be  entitled  to pursue all other  available
legal or equitable remedies.


                                      - 5 -

<PAGE>


     (d) For  purposes of Section 5, where the context  admits,  the term "SPSS"
includes SPSS Inc.,  its  subsidiaries  and all of their  respective  affiliated
entities and their successors and assigns.

     6.  Governing  Law.  This  Agreement  shall be governed by and construed in
accordance with the laws of the State of Illinois  applicable to agreements made
and to be  performed  in  Illinois,  without  giving  effect to conflicts of law
principles.

     7. Headings.  The section headings of this Agreement are for reference only
and are to be given no  effect in the  construction  or  interpretation  of this
Agreement.

     8.  Severability.  If any  part or  provision  of this  Agreement  shall be
declared  invalid or unenforceable  by a court of competent  jurisdiction,  said
provision  or part  shall be  ineffective  to the extent of such  invalidity  or
unenforceability  only,  without in any way  affecting  the  remaining  parts or
provisions of this Agreement.

     9. Waiver.  Any party may waive compliance by another party with any of the
provisions of this Agreement. No waiver of any provision shall be construed as a
waiver of any other provision. Any waiver must be in writing.

     10. Binding  Effect;  Assignment.  This  Agreement  shall be binding on and
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted assigns. Nothing in this Agreement shall create or be deemed to create
any third  party  beneficiary  rights in any  person  or entity  (including  any
employee  or  person  engaged  by SPSS  in any  capacity)  not a  party  to this
Agreement.  SPSS will require any  successor  (whether  direct or  indirect,  by
merger,  purchase,  consolidation  or  otherwise)  of SPSS  to  make an  express
assumption of the obligations  hereunder and cause any successor (whether direct
or indirect, by merger,  purchase,  consolidation or otherwise) of SPSS to agree
to perform all parts and provisions  under this Agreement in the same manner and
to the  same  extent  that  SPSS  would be  required  to  perform  it if no such
succession had taken place.

     11.   Counterparts.   This  Agreement  may  be  signed  in  any  number  of
counterparts and all such  counterparts  shall be read together and construed as
but one and the same document.

     12.  Notices.  All notices and other  communications  under this  Agreement
shall be in writing and shall be deemed given when delivered personally, one day
after sent by recognized  overnight  courier,  or five (5) days after deposit in
the United States mail,  postage prepaid,  registered or certified mail,  return
receipt requested,  to the parties at the following  addresses (or to such other
address as a party may have specified by notice duly given to the other party in
accordance with this provision):


                                      - 6 -

<PAGE>


     If to the Employee:

     At the Employee's  then current  business or residence  address as shown on
the records of SPSS,  with a copy to such other  person as the Employee may have
specified by notice duly given to SPSS in accordance with this provision.

     If to SPSS:

                           SPSS Inc.
                           444 N. Michigan Avenue
                           Chicago, Illinois 60611

                           Attention: President

     With a copy to:

                           Ross & Hardies
                           150 N. Michigan Avenue
                           Chicago, Illinois 60601-7567

                           Attention:  Lawrence R. Samuels, Esq.


     IN WITNESS  WHEREOF the parties have  executed  this  Agreement on the date
first written above.


                                                     Employee


                                                     /s/EDWARD HAMBURG
                                                     EDWARD HAMBURG


                                                     SPSS Inc.


                                                     By:/s/JACK NOONAN
                                                     Name: Jack Noonan
                                                     Its:  President and Chief
                                                           Executive Officer


                                      - 7 -


                                                                    EXHIBIT 10.3

                                SENIOR MANAGEMENT
                       CHANGE OF CONTROL AGREEMENT BETWEEN
                               LOUISE REHLING AND
                                    SPSS INC.


     THIS  CHANGE  OF  CONTROL   AGREEMENT,   dated  as  of  May  1,  1998  (the
"Agreement"),  is by and between  SPSS Inc., a Delaware  corporation  having its
principal offices at 444 N. Michigan Avenue, Chicago,  Illinois 60611 ("SPSS" or
the "Company"),  and Louise Rehling,  a senior management  employee of SPSS (the
"Employee").

     WHEREAS,  the Employee is presently serving as the Executive Vice President
Product Development of SPSS; and

     WHEREAS, SPSS desires to continue the Employee's services as Executive Vice
President Product  Development and to provide the Employee with the benefits set
forth herein in consideration of the Employee's  continued  employment,  and the
Employee is willing to continue his  employment as an employee of SPSS and enter
into this Agreement on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
conditions  contained  herein and other  good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
agree as follows:

     1. Certain Defined Terms.

     (a)  "Cause"  shall mean  material  nonperformance  by the  Employee of the
Employee's  duties or material  injury or harm to the  Company or its  successor
caused by the Employee.

     (b) "Change of Control," as used herein,  shall mean any one or more of the
following: (i) the accumulation,  by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of 1934,
as amended  (the  "Exchange  Act")) not  previously  owning  common stock of the
Company,  of Fifteen Percent (15%) or more of the shares of the then outstanding
common  stock  of SPSS  (the  "Outstanding  Common  Stock"),  (ii) a  merger  or
consolidation  of SPSS in which SPSS does not survive as an  independent  public
company,  (iii) a sale of all or substantially all of the assets of SPSS, (iv) a
triggering event under any Rights Agreement of SPSS, as such agreement may exist
from  time to time,  or (v) a  liquidation  or  dissolution  of SPSS;  provided,
however,  that the  following  acquisitions  shall  not  constitute  a Change of
Control for the purposes of this  subsection  (a): (i) any acquisition of common
stock or securities  convertible  into common stock  directly from SPSS, or (ii)
any acquisition of common stock or securities  convertible  into common stock by
any employee benefit plan (or related trust) sponsored or maintained by SPSS.

<PAGE>


     (c) "Constructive Termination," as used herein, shall mean (i) a reduction,
for a reason other than Cause,  in annualized  cash  compensation by 20% or more
(compared to the cash  compensation  which the  Employee  received in the fiscal
year  immediately  preceding  the  year of the  Effective  Date of a  Change  of
Control)  which occurs during any twelve month period  beginning on or after the
Effective Date of any Change of Control referred to above and ending on or prior
to the later of (x) the second  anniversary  date of the  Effective  Date of any
Change of Control  referred to above or (y) the last day of vesting for any SPSS
options  then  held by the  Employee  which  options  have not  vested as of the
Effective  Date of any Change of Control  referred to above;  or (ii) any action
(an  "Action"),  for a reason  other  than  Cause,  by SPSS  which  results in a
diminution in any material respect of the Employee's position, authority, duties
or  responsibilities as the same existed immediately prior to the Effective Date
of the Change of Control  referred  to above.  Further,  in order for it to be a
Constructive  Termination,  either  (i) or (ii) above  must be  followed  within
ninety (90) days with the resignation of the Employee.

     A change in the Employee's  title or a transfer to a different  division or
subsidiary,  whether  publicly  or  privately  held,  shall not in and of itself
constitute an Action. Rather, the focus turns on the substance of the Employee's
duties.

     (d)  "Effective  Date," as used  herein,  shall mean the first date  during
which a Change of Control (as defined in Section 1(b)) occurs.

     2. Change of Control in a Transaction with a Private Company.  In the event
a Change of Control  occurs as the result of a  transaction  between  SPSS and a
company whose common stock is not publicly  traded on a domestic  national stock
exchange,  the  NASDAQ  national  market,  or  their  respective  successors  or
equivalents  (a  "Private  Company"),  the  Employee  shall  have the rights and
benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence  of Change of  Control
between  SPSS and a  Private  Company,  the  Employee  is  hired  for at least a
one-year period,  with an employment package equal to or greater than the larger
of (i) the total cash  compensation  received by the Employee in the immediately
preceding full fiscal year or (ii) two times the Employee's base salary received
in the  immediately  preceding  fiscal year, all of Employee stock options shall
vest on the  Effective  Date on which the Change of Control  occurs and shall be
cashed out at the transaction  value on the occurrence of the  transaction  with
the Private Company on or within ninety (90) days following a Change of Control.
If Employee  shall be hired with an employment  package equal to or greater than
the  larger of (i) the total  cash  compensation  received  by  Employee  in the
preceding  fiscal year or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year,  Employee  shall receive an employment
agreement which provides for the following upon involuntary  termination without
cause or  Constructive  Termination  after the  Effective  Date of the Change of
Control and within two (2) years  after the Change of  Control:  (1) a severance
package equal to the greater of (i) the aggregate cash compensation  received in
the  immediately  preceding  fiscal year or (ii) two times the  Employee's  base
salary received in the immediately

                                      - 2 -
<PAGE>


preceding fiscal year; and (2) in the event of a Constructive  Termination,  the
option to terminate  employment  while still  receiving  the  severance  package
referred to in 2(a)(1) above. If Employee is hired for a period of less than one
year, the provisions of Constructive Termination apply.

     (b)  Involuntary  Termination;  Constructive  Termination  Upon a Change of
Control.  If upon the occurrence of Change of Control between SPSS and a Private
Company, there is either an involuntary termination of Employee without Cause or
Constructive  Termination,  the vesting of all Employee  stock  options shall be
accelerated  to the  Effective  Date on which the Change of  Control  occurs and
shall  be  cashed  out  at  the  transaction  value  on  the  occurrence  of the
transaction  with the  Private  Company on or within  ninety  (90) days from the
occurrence  of the  Change of  Control.  Employee  shall  receive a one (1) year
severance  package equal to the greater of (i) the Employee's cash  compensation
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the fiscal year immediately preceding the year of the Effective Date of a Change
of Control.

     (c)  Voluntary  Resignation.  If upon the  occurrence  of Change of Control
between  SPSS  and a  Private  Company,  Employee  voluntarily  resigns,  all of
Employee's  unvested SPSS stock options shall be forfeited and all of Employee's
vested options shall be cashed out at the transaction value on the occurrence of
the transaction with the Private Company on or within ninety (90) days following
a Change of Control.

     3. Change of Control in a Transaction With a Public Company. In the event a
Change of  Control  occurs  between  SPSS and a company  whose  common  stock is
publicly  traded on the domestic  national stock  exchange,  the NASDAQ national
market, or their respective successors and equivalents (a "Public Company"), the
Employee shall have the rights and benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence of a Change of Control
between SPSS and a Public Company, the Employee is hired for at least a one-year
period,  with an  employment  package equal to or greater than the larger of (i)
the  total  cash  compensation  received  by the  Employee  in  the  immediately
preceding  year or (ii) two times the  Employee's  base  salary  received in the
immediately  preceding fiscal year, all of Employee's stock options shall either
(i) vest on the Effective  Date on which the Change of Control  occurs and shall
be cashed out at the transaction value on or within ninety (90) days following a
Change  of  Control;  or (ii)  shall be  converted  into  stock  options  of the
acquiring   Public   Company  on   substantially   equivalent   economic   terms
("Replacement Options"). If Replacement Options are granted, they shall continue
to vest at the same rate as under the SPSS  Option  Plan  prior to the Change of
Control.  If  Employee  shall be hired for at least a  one-year  period,  by the
acquiring Public Company with an employment package equal to or greater than the
larger of (i) the total cash compensation  which Employee received in the fiscal
year immediately preceding the year of the Effective Date of a Change of Control
or (ii) two  times  the  Employee's  base  salary  received  in the  immediately
preceding fiscal year,

                                      - 3 -

<PAGE>


Employee shall receive an employment agreement which provides the following upon
the  occurrence of an  involuntary  termination  without  Cause or  Constructive
Termination after the Effective Date of the Change of Control and within two (2)
years after the Change of Control:  (1) a severance package equal to the greater
of (i) the aggregate cash  compensation  received in the  immediately  preceding
fiscal  year or (ii) two  times  the  Employee's  base  salary  received  in the
immediately  preceding  fiscal year;  (2) immediate  accelerated  vesting of all
previously unvested  Replacement Options; and (3) in the event of a Constructive
Termination,  the option to  terminate  employment  while  still  receiving  the
severance  package  referred  to in 3(a)(i)  above.  If  Employee is hired for a
period less than one year, the provisions of Constructive Termination apply.

     If a Constructive  Termination or an involuntary  Termination without Cause
occurs two (2) years or more after the  Effective  Date of a Change of  Control,
the vesting of all previously unvested  Replacement Options shall be accelerated
to the date on which the Employee is subject to a  Constructive  Termination  or
involuntary termination.

     (b)  Involuntary  Termination/Constructive  Termination  Upon a  Change  of
Control.  If,  upon the  occurrence  of a Change of Control  between  SPSS and a
Public Company there is either an involuntary termination of an Employee without
Cause or a  Constructive  Termination  of  Employee,  (i) the  vesting of all of
Employee's stock options shall be accelerated to the Effective Date on which the
Change of  Control  occurs,  and shall be cashed  out at the  Change of  Control
transaction  value or must be exercised by Employee within ninety (90) days from
the  occurrence  of a Change of Control (if there is a Change of Control with no
transaction)  and (ii) Employee shall receive a one (1) year  severance  package
equal to the  greater of (A) the cash  compensation  received by Employee in the
fiscal year immediately  preceding the year of the Effective Date of a Change of
Control or (B) two times the Employee's  base salary received in the fiscal year
immediately preceding the year of the Effective Date of a Change of Control.

     (c) Voluntary Resignation on Change of Control. If upon the occurrence of a
Change  of  Control  between  SPSS and a Public  Company,  Employee  voluntarily
resigns,  at the  time of the  Effective  Date of the  Change  of  Control,  all
unvested SPSS stock options held by Employee shall be forfeited,  and all vested
options shall be cashed out at the Change of Control  transaction  value or must
be exercised by Employee  within  ninety (90) days from the  occurrence  of such
Change of Control (if there is a Change of Control with no transaction).

     4. Health and Welfare Benefits.  Notwithstanding the rights and obligations
as outlined in Sections 2 or 3 above,  if Employee is  involuntarily  terminated
without  Cause or is  subject  to a  Constructive  Termination  on or after  the
Effective  Date of a Change  of  Control  or  within  the later of two (2) years
following the Effective  Date of a Change of Control in addition to the benefits
set forth above in Sections 2 and 3, the Employee shall continue to receive,  at
the cost of the employer, the same health and welfare benefits (in effect at any
time one hundred  twenty (120) days prior to the  Effective  Date of a Change of
Control), but only to the extent each plan which governs the benefits permits

                                      - 4 -
<PAGE>


participation  by  terminated  employees,  for a period of eighteen  (18) months
following the date of  involuntary  termination  without  Cause or  Constructive
Termination.

     5. Non-Compete.

     (a) Employee hereby  covenants and agrees that during the period of time he
collects a severance package,  he shall not (i) directly or indirectly  (whether
through a  partnership  of which the  Employee is a partner or through any other
individual or entity in which  Employee has any interest,  legal or  equitable),
engage in any business  competitive  with the business of SPSS (ii)  directly or
indirectly  (whether  through a  partnership  of which  Employee is a partner or
through any other individual or entity in which Employee has any interest, legal
or  equitable),  solicit or  otherwise  engage with any  customers or clients of
SPSS,  in any  transactions  which are in direct  competition  with the software
business of SPSS which SPSS did or could have engaged in with those customers or
clients, or (iii) directly or indirectly (whether through a partnership of which
Employee  is a  partner  or  through  any  other  individual  or entity in which
Employee  has any  interest,  legal or  equitable),  assist  any  person  in the
development,  programming, servicing, maintenance, manufacture, sale, licensing,
distribution or marketing (including,  without limitation, giving away software)
of software and related  products in competition  with SPSS'  products,  in each
case  in the  United  States  of  America  or any  country  where  SPSS,  or its
subsidiaries  or affiliates are doing business with respect to SPSS products and
services and in each case excluding  passive  investment  interests of less than
two percent (2%) in corporations  whose stock is registered under the Securities
Exchange Act of 1934, as amended.

     (b) Employee  understands  that a breach by him of this Section 5 may cause
substantial injury to SPSS, which may be irreparable and/or in amounts difficult
or impossible to ascertain, and that in the event Employee breaches this Section
5, SPSS shall have, in addition to all other remedies  available in the event of
a breach of this Agreement,  the right to injunctive or other equitable  relief.
Further,  Employee acknowledges and agrees that the restrictions and commitments
set forth in this Agreement are necessary to protect SPSS' legitimate  interests
and are  reasonable  in  scope,  area  and  time,  and  that  if,  despite  this
acknowledgment and agreement, at the time of the enforcement of any provision of
this Agreement a court of competent  jurisdiction  shall hold that the period or
scope of such provision is unreasonable  under the circumstances  then existing,
the  maximum  reasonable  period  or scope  under  such  circumstances  shall be
substituted for the period or scope stated in such provision.

     (c) Should  Employee  breach this Section 5, all severance  payments  shall
cease  immediately,  and SPSS shall be  entitled  to pursue all other  available
legal or equitable remedies.

     (d) For  purposes of Section 5, where the context  admits,  the term "SPSS"
includes SPSS Inc.,  its  subsidiaries  and all of their  respective  affiliated
entities and their successors and assigns.

                                      - 5 -

<PAGE>


     6.  Governing  Law.  This  Agreement  shall be governed by and construed in
accordance with the laws of the State of Illinois  applicable to agreements made
and to be  performed  in  Illinois,  without  giving  effect to conflicts of law
principles.

     7. Headings.  The section headings of this Agreement are for reference only
and are to be given no  effect in the  construction  or  interpretation  of this
Agreement.

     8.  Severability.  If any  part or  provision  of this  Agreement  shall be
declared  invalid or unenforceable  by a court of competent  jurisdiction,  said
provision  or part  shall be  ineffective  to the extent of such  invalidity  or
unenforceability  only,  without in any way  affecting  the  remaining  parts or
provisions of this Agreement.

     9. Waiver.  Any party may waive compliance by another party with any of the
provisions of this Agreement. No waiver of any provision shall be construed as a
waiver of any other provision. Any waiver must be in writing.

     10. Binding  Effect;  Assignment.  This  Agreement  shall be binding on and
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted assigns. Nothing in this Agreement shall create or be deemed to create
any third  party  beneficiary  rights in any  person  or entity  (including  any
employee  or  person  engaged  by SPSS  in any  capacity)  not a  party  to this
Agreement.  SPSS will require any  successor  (whether  direct or  indirect,  by
merger,  purchase,  consolidation  or  otherwise)  of SPSS  to  make an  express
assumption of the obligations  hereunder and cause any successor (whether direct
or indirect, by merger,  purchase,  consolidation or otherwise) of SPSS to agree
to perform all parts and provisions  under this Agreement in the same manner and
to the  same  extent  that  SPSS  would be  required  to  perform  it if no such
succession had taken place.

     11.   Counterparts.   This  Agreement  may  be  signed  in  any  number  of
counterparts and all such  counterparts  shall be read together and construed as
but one and the same document.

     12.  Notices.  All notices and other  communications  under this  Agreement
shall be in writing and shall be deemed given when delivered personally, one day
after sent by recognized  overnight  courier,  or five (5) days after deposit in
the United States mail,  postage prepaid,  registered or certified mail,  return
receipt requested,  to the parties at the following  addresses (or to such other
address as a party may have specified by notice duly given to the other party in
accordance with this provision):

     If to the Employee:

     At the Employee's  then current  business or residence  address as shown on
the records of SPSS,  with a copy to such other  person as the Employee may have
specified by notice duly given to SPSS in accordance with this provision.


                                      - 6 -

<PAGE>


     If to SPSS:

                           SPSS Inc.
                           444 N. Michigan Avenue
                           Chicago, Illinois 60611

                           Attention: President

     With a copy to:

                           Ross & Hardies
                           150 N. Michigan Avenue
                           Chicago, Illinois 60601-7567

                           Attention:  Lawrence R. Samuels, Esq.


     IN WITNESS  WHEREOF the parties have  executed  this  Agreement on the date
first written above.


                                                     Employee

                                                     /s/LOUISE REHLING
                                                     LOUISE REHLING


                                                     SPSS Inc.

                                                     By:/s/JACK NOONAN
                                                     Name:  Jack Noonan
                                                     Its:   President and Chief
                                                            Executive Officer


                                      - 7 -


                                                                    EXHIBIT 10.4

                                SENIOR MANAGEMENT
                       CHANGE OF CONTROL AGREEMENT BETWEEN
                                SUSAN PHELAN AND
                                    SPSS INC.


     THIS  CHANGE  OF  CONTROL   AGREEMENT,   dated  as  of  May  1,  1998  (the
"Agreement"),  is by and between  SPSS Inc., a Delaware  corporation  having its
principal offices at 444 N. Michigan Avenue, Chicago,  Illinois 60611 ("SPSS" or
the  "Company"),  and Susan Phelan,  a senior  management  employee of SPSS (the
"Employee").

     WHEREAS,  the Employee is presently serving as the Executive Vice President
Products & Services of SPSS; and

     WHEREAS, SPSS desires to continue the Employee's services as Executive Vice
President  Products & Services and to provide the Employee with the benefits set
forth herein in consideration of the Employee's  continued  employment,  and the
Employee is willing to continue his  employment as an employee of SPSS and enter
into this Agreement on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
conditions  contained  herein and other  good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
agree as follows:

     1. Certain Defined Terms.

     (a)  "Cause"  shall mean  material  nonperformance  by the  Employee of the
Employee's  duties or material  injury or harm to the  Company or its  successor
caused by the Employee.

     (b) "Change of Control," as used herein,  shall mean any one or more of the
following: (i) the accumulation,  by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of 1934,
as amended  (the  "Exchange  Act")) not  previously  owning  common stock of the
Company,  of Fifteen Percent (15%) or more of the shares of the then outstanding
common  stock  of SPSS  (the  "Outstanding  Common  Stock"),  (ii) a  merger  or
consolidation  of SPSS in which SPSS does not survive as an  independent  public
company,  (iii) a sale of all or substantially all of the assets of SPSS, (iv) a
triggering event under any Rights Agreement of SPSS, as such agreement may exist
from  time to time,  or (v) a  liquidation  or  dissolution  of SPSS;  provided,
however,  that the  following  acquisitions  shall  not  constitute  a Change of
Control for the purposes of this  subsection  (a): (i) any acquisition of common
stock or securities  convertible  into common stock  directly from SPSS, or (ii)
any acquisition of common stock or securities  convertible  into common stock by
any employee benefit plan (or related trust) sponsored or maintained by SPSS.

<PAGE>


     (c) "Constructive Termination," as used herein, shall mean (i) a reduction,
for a reason other than Cause,  in annualized  cash  compensation by 20% or more
(compared to the cash  compensation  which the  Employee  received in the fiscal
year  immediately  preceding  the  year of the  Effective  Date of a  Change  of
Control)  which occurs during any twelve month period  beginning on or after the
Effective Date of any Change of Control referred to above and ending on or prior
to the later of (x) the second  anniversary  date of the  Effective  Date of any
Change of Control  referred to above or (y) the last day of vesting for any SPSS
options  then  held by the  Employee  which  options  have not  vested as of the
Effective  Date of any Change of Control  referred to above;  or (ii) any action
(an  "Action"),  for a reason  other  than  Cause,  by SPSS  which  results in a
diminution in any material respect of the Employee's position, authority, duties
or  responsibilities as the same existed immediately prior to the Effective Date
of the Change of Control  referred  to above.  Further,  in order for it to be a
Constructive  Termination,  either  (i) or (ii) above  must be  followed  within
ninety (90) days with the resignation of the Employee.

     A change in the Employee's  title or a transfer to a different  division or
subsidiary,  whether  publicly  or  privately  held,  shall not in and of itself
constitute an Action. Rather, the focus turns on the substance of the Employee's
duties.

     (d)  "Effective  Date," as used  herein,  shall mean the first date  during
which a Change of Control (as defined in Section 1(b)) occurs.

     2. Change of Control in a Transaction with a Private Company.  In the event
a Change of Control  occurs as the result of a  transaction  between  SPSS and a
company whose common stock is not publicly  traded on a domestic  national stock
exchange,  the  NASDAQ  national  market,  or  their  respective  successors  or
equivalents  (a  "Private  Company"),  the  Employee  shall  have the rights and
benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence  of Change of  Control
between  SPSS and a  Private  Company,  the  Employee  is  hired  for at least a
one-year period,  with an employment package equal to or greater than the larger
of (i) the total cash  compensation  received by the Employee in the immediately
preceding full fiscal year or (ii) two times the Employee's base salary received
in the  immediately  preceding  fiscal year, all of Employee stock options shall
vest on the  Effective  Date on which the Change of Control  occurs and shall be
cashed out at the transaction  value on the occurrence of the  transaction  with
the Private Company on or within ninety (90) days following a Change of Control.
If Employee  shall be hired with an employment  package equal to or greater than
the  larger of (i) the total  cash  compensation  received  by  Employee  in the
preceding  fiscal year or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year,  Employee  shall receive an employment
agreement which provides for the following upon involuntary  termination without
cause or  Constructive  Termination  after the  Effective  Date of the Change of
Control and within two (2) years  after the Change of  Control:  (1) a severance
package equal to the greater of (i) the aggregate cash compensation  received in
the  immediately  preceding  fiscal year or (ii) two times the  Employee's  base
salary received in the immediately

                                      - 2 -
<PAGE>


preceding fiscal year; and (2) in the event of a Constructive  Termination,  the
option to terminate  employment  while still  receiving  the  severance  package
referred to in 2(a)(1) above. If Employee is hired for a period of less than one
year, the provisions of Constructive Termination apply.

     (b)  Involuntary  Termination;  Constructive  Termination  Upon a Change of
Control.  If upon the occurrence of Change of Control between SPSS and a Private
Company, there is either an involuntary termination of Employee without Cause or
Constructive  Termination,  the vesting of all Employee  stock  options shall be
accelerated  to the  Effective  Date on which the Change of  Control  occurs and
shall  be  cashed  out  at  the  transaction  value  on  the  occurrence  of the
transaction  with the  Private  Company on or within  ninety  (90) days from the
occurrence  of the  Change of  Control.  Employee  shall  receive a one (1) year
severance  package equal to the greater of (i) the Employee's cash  compensation
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the fiscal year immediately preceding the year of the Effective Date of a Change
of Control.

     (c)  Voluntary  Resignation.  If upon the  occurrence  of Change of Control
between  SPSS  and a  Private  Company,  Employee  voluntarily  resigns,  all of
Employee's  unvested SPSS stock options shall be forfeited and all of Employee's
vested options shall be cashed out at the transaction value on the occurrence of
the transaction with the Private Company on or within ninety (90) days following
a Change of Control.

     3. Change of Control in a Transaction With a Public Company. In the event a
Change of  Control  occurs  between  SPSS and a company  whose  common  stock is
publicly  traded on the domestic  national stock  exchange,  the NASDAQ national
market, or their respective successors and equivalents (a "Public Company"), the
Employee shall have the rights and benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence of a Change of Control
between SPSS and a Public Company, the Employee is hired for at least a one-year
period,  with an  employment  package equal to or greater than the larger of (i)
the  total  cash  compensation  received  by the  Employee  in  the  immediately
preceding  year or (ii) two times the  Employee's  base  salary  received in the
immediately  preceding fiscal year, all of Employee's stock options shall either
(i) vest on the Effective  Date on which the Change of Control  occurs and shall
be cashed out at the transaction value on or within ninety (90) days following a
Change  of  Control;  or (ii)  shall be  converted  into  stock  options  of the
acquiring   Public   Company  on   substantially   equivalent   economic   terms
("Replacement Options"). If Replacement Options are granted, they shall continue
to vest at the same rate as under the SPSS  Option  Plan  prior to the Change of
Control.  If  Employee  shall be hired for at least a  one-year  period,  by the
acquiring Public Company with an employment package equal to or greater than the
larger of (i) the total cash compensation  which Employee received in the fiscal
year immediately preceding the year of the Effective Date of a Change of Control
or (ii) two  times  the  Employee's  base  salary  received  in the  immediately
preceding fiscal year,

                                      - 3 -
<PAGE>


Employee shall receive an employment agreement which provides the following upon
the  occurrence of an  involuntary  termination  without  Cause or  Constructive
Termination after the Effective Date of the Change of Control and within two (2)
years after the Change of Control:  (1) a severance package equal to the greater
of (i) the aggregate cash  compensation  received in the  immediately  preceding
fiscal  year or (ii) two  times  the  Employee's  base  salary  received  in the
immediately  preceding  fiscal year;  (2) immediate  accelerated  vesting of all
previously unvested  Replacement Options; and (3) in the event of a Constructive
Termination,  the option to  terminate  employment  while  still  receiving  the
severance  package  referred  to in 3(a)(i)  above.  If  Employee is hired for a
period less than one year, the provisions of Constructive Termination apply.

     If a Constructive  Termination or an involuntary  Termination without Cause
occurs two (2) years or more after the  Effective  Date of a Change of  Control,
the vesting of all previously unvested  Replacement Options shall be accelerated
to the date on which the Employee is subject to a  Constructive  Termination  or
involuntary termination.

     (b)  Involuntary  Termination/Constructive  Termination  Upon a  Change  of
Control.  If,  upon the  occurrence  of a Change of Control  between  SPSS and a
Public Company there is either an involuntary termination of an Employee without
Cause or a  Constructive  Termination  of  Employee,  (i) the  vesting of all of
Employee's stock options shall be accelerated to the Effective Date on which the
Change of  Control  occurs,  and shall be cashed  out at the  Change of  Control
transaction  value or must be exercised by Employee within ninety (90) days from
the  occurrence  of a Change of Control (if there is a Change of Control with no
transaction)  and (ii) Employee shall receive a one (1) year  severance  package
equal to the  greater of (A) the cash  compensation  received by Employee in the
fiscal year immediately  preceding the year of the Effective Date of a Change of
Control or (B) two times the Employee's  base salary received in the fiscal year
immediately preceding the year of the Effective Date of a Change of Control.

     (c) Voluntary Resignation on Change of Control. If upon the occurrence of a
Change  of  Control  between  SPSS and a Public  Company,  Employee  voluntarily
resigns,  at the  time of the  Effective  Date of the  Change  of  Control,  all
unvested SPSS stock options held by Employee shall be forfeited,  and all vested
options shall be cashed out at the Change of Control  transaction  value or must
be exercised by Employee  within  ninety (90) days from the  occurrence  of such
Change of Control (if there is a Change of Control with no transaction).

     4. Health and Welfare Benefits.  Notwithstanding the rights and obligations
as outlined in Sections 2 or 3 above,  if Employee is  involuntarily  terminated
without  Cause or is  subject  to a  Constructive  Termination  on or after  the
Effective  Date of a Change  of  Control  or  within  the later of two (2) years
following the Effective  Date of a Change of Control in addition to the benefits
set forth above in Sections 2 and 3, the Employee shall continue to receive,  at
the cost of the employer, the same health and welfare benefits (in effect at any
time one hundred twenty (120) days prior to the Effective Date of a

                                      - 4 -

<PAGE>


Change of Control),  but only to the extent each plan which governs the benefits
permits  participation  by terminated  employees,  for a period of eighteen (18)
months  following  the  date  of  involuntary   termination   without  Cause  or
Constructive Termination.

     5. Non-Compete.

     (a) Employee hereby  covenants and agrees that during the period of time he
collects a severance package,  he shall not (i) directly or indirectly  (whether
through a  partnership  of which the  Employee is a partner or through any other
individual or entity in which  Employee has any interest,  legal or  equitable),
engage in any business  competitive  with the business of SPSS (ii)  directly or
indirectly  (whether  through a  partnership  of which  Employee is a partner or
through any other individual or entity in which Employee has any interest, legal
or  equitable),  solicit or  otherwise  engage with any  customers or clients of
SPSS,  in any  transactions  which are in direct  competition  with the software
business of SPSS which SPSS did or could have engaged in with those customers or
clients, or (iii) directly or indirectly (whether through a partnership of which
Employee  is a  partner  or  through  any  other  individual  or entity in which
Employee  has any  interest,  legal or  equitable),  assist  any  person  in the
development,  programming, servicing, maintenance, manufacture, sale, licensing,
distribution or marketing (including,  without limitation, giving away software)
of software and related  products in competition  with SPSS'  products,  in each
case  in the  United  States  of  America  or any  country  where  SPSS,  or its
subsidiaries  or affiliates are doing business with respect to SPSS products and
services and in each case excluding  passive  investment  interests of less than
two percent (2%) in corporations  whose stock is registered under the Securities
Exchange Act of 1934, as amended.

     (b) Employee  understands  that a breach by him of this Section 5 may cause
substantial injury to SPSS, which may be irreparable and/or in amounts difficult
or impossible to ascertain, and that in the event Employee breaches this Section
5, SPSS shall have, in addition to all other remedies  available in the event of
a breach of this Agreement,  the right to injunctive or other equitable  relief.
Further,  Employee acknowledges and agrees that the restrictions and commitments
set forth in this Agreement are necessary to protect SPSS' legitimate  interests
and are  reasonable  in  scope,  area  and  time,  and  that  if,  despite  this
acknowledgment and agreement, at the time of the enforcement of any provision of
this Agreement a court of competent  jurisdiction  shall hold that the period or
scope of such provision is unreasonable  under the circumstances  then existing,
the  maximum  reasonable  period  or scope  under  such  circumstances  shall be
substituted for the period or scope stated in such provision.

     (c) Should  Employee  breach this Section 5, all severance  payments  shall
cease  immediately,  and SPSS shall be  entitled  to pursue all other  available
legal or equitable remedies.


                                      - 5 -

<PAGE>


     (d) For  purposes of Section 5, where the context  admits,  the term "SPSS"
includes SPSS Inc.,  its  subsidiaries  and all of their  respective  affiliated
entities and their successors and assigns.

     6.  Governing  Law.  This  Agreement  shall be governed by and construed in
accordance with the laws of the State of Illinois  applicable to agreements made
and to be  performed  in  Illinois,  without  giving  effect to conflicts of law
principles.

     7. Headings.  The section headings of this Agreement are for reference only
and are to be given no  effect in the  construction  or  interpretation  of this
Agreement.

     8.  Severability.  If any  part or  provision  of this  Agreement  shall be
declared  invalid or unenforceable  by a court of competent  jurisdiction,  said
provision  or part  shall be  ineffective  to the extent of such  invalidity  or
unenforceability  only,  without in any way  affecting  the  remaining  parts or
provisions of this Agreement.

     9. Waiver.  Any party may waive compliance by another party with any of the
provisions of this Agreement. No waiver of any provision shall be construed as a
waiver of any other provision. Any waiver must be in writing.

     10. Binding  Effect;  Assignment.  This  Agreement  shall be binding on and
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted assigns. Nothing in this Agreement shall create or be deemed to create
any third  party  beneficiary  rights in any  person  or entity  (including  any
employee  or  person  engaged  by SPSS  in any  capacity)  not a  party  to this
Agreement.  SPSS will require any  successor  (whether  direct or  indirect,  by
merger,  purchase,  consolidation  or  otherwise)  of SPSS  to  make an  express
assumption of the obligations  hereunder and cause any successor (whether direct
or indirect, by merger,  purchase,  consolidation or otherwise) of SPSS to agree
to perform all parts and provisions  under this Agreement in the same manner and
to the  same  extent  that  SPSS  would be  required  to  perform  it if no such
succession had taken place.

     11.   Counterparts.   This  Agreement  may  be  signed  in  any  number  of
counterparts and all such  counterparts  shall be read together and construed as
but one and the same document.

     12.  Notices.  All notices and other  communications  under this  Agreement
shall be in writing and shall be deemed given when delivered personally, one day
after sent by recognized  overnight  courier,  or five (5) days after deposit in
the United States mail,  postage prepaid,  registered or certified mail,  return
receipt requested,  to the parties at the following  addresses (or to such other
address as a party may have specified by notice duly given to the other party in
accordance with this provision):


                                      - 6 -

<PAGE>


     If to the Employee:

     At the Employee's  then current  business or residence  address as shown on
the records of SPSS,  with a copy to such other  person as the Employee may have
specified by notice duly given to SPSS in accordance with this provision.

     If to SPSS:

                           SPSS Inc.
                           444 N. Michigan Avenue
                           Chicago, Illinois 60611

                           Attention: President

     With a copy to:

                           Ross & Hardies
                           150 N. Michigan Avenue
                           Chicago, Illinois 60601-7567

                           Attention:  Lawrence R. Samuels, Esq.


     IN WITNESS  WHEREOF the parties have  executed  this  Agreement on the date
first written above.


                                                     Employee

                                                     /s/SUSAN PHELAN
                                                     SUSAN PHELAN


                                                     SPSS Inc.


                                                     By:/s/JACK NOONAN
                                                     Name:  Jack Noonan
                                                     Its:   President and Chief
                                                            Executive Officer


                                      - 7 -


                                                                    EXHIBIT 10.5

                                SENIOR MANAGEMENT
                       CHANGE OF CONTROL AGREEMENT BETWEEN
                               MARK BATTAGLIA AND
                                    SPSS INC.


     THIS  CHANGE  OF  CONTROL   AGREEMENT,   dated  as  of  May  1,  1998  (the
"Agreement"),  is by and between  SPSS Inc., a Delaware  corporation  having its
principal offices at 444 N. Michigan Avenue, Chicago,  Illinois 60611 ("SPSS" or
the "Company"),  and Mark Battaglia,  a senior management  employee of SPSS (the
"Employee").

     WHEREAS,  the Employee is presently serving as the Executive Vice President
Corporate Marketing of SPSS; and

     WHEREAS, SPSS desires to continue the Employee's services as Executive Vice
President  Corporate Marketing and to provide the Employee with the benefits set
forth herein in consideration of the Employee's  continued  employment,  and the
Employee is willing to continue his  employment as an employee of SPSS and enter
into this Agreement on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
conditions  contained  herein and other  good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
agree as follows:

     1. Certain Defined Terms.

     (a)  "Cause"  shall mean  material  nonperformance  by the  Employee of the
Employee's  duties or material  injury or harm to the  Company or its  successor
caused by the Employee.

     (b) "Change of Control," as used herein,  shall mean any one or more of the
following: (i) the accumulation,  by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of 1934,
as amended  (the  "Exchange  Act")) not  previously  owning  common stock of the
Company,  of Fifteen Percent (15%) or more of the shares of the then outstanding
common  stock  of SPSS  (the  "Outstanding  Common  Stock"),  (ii) a  merger  or
consolidation  of SPSS in which SPSS does not survive as an  independent  public
company,  (iii) a sale of all or substantially all of the assets of SPSS, (iv) a
triggering event under any Rights Agreement of SPSS, as such agreement may exist
from  time to time,  or (v) a  liquidation  or  dissolution  of SPSS;  provided,
however,  that the  following  acquisitions  shall  not  constitute  a Change of
Control for the purposes of this  subsection  (a): (i) any acquisition of common
stock or securities  convertible  into common stock  directly from SPSS, or (ii)
any acquisition of common stock or securities convertible

<PAGE>


into common stock by any employee  benefit plan (or related trust)  sponsored or
maintained by SPSS.

     (c) "Constructive Termination," as used herein, shall mean (i) a reduction,
for a reason other than Cause,  in annualized  cash  compensation by 20% or more
(compared to the cash  compensation  which the  Employee  received in the fiscal
year  immediately  preceding  the  year of the  Effective  Date of a  Change  of
Control)  which occurs during any twelve month period  beginning on or after the
Effective Date of any Change of Control referred to above and ending on or prior
to the later of (x) the second  anniversary  date of the  Effective  Date of any
Change of Control  referred to above or (y) the last day of vesting for any SPSS
options  then  held by the  Employee  which  options  have not  vested as of the
Effective  Date of any Change of Control  referred to above;  or (ii) any action
(an  "Action"),  for a reason  other  than  Cause,  by SPSS  which  results in a
diminution in any material respect of the Employee's position, authority, duties
or  responsibilities as the same existed immediately prior to the Effective Date
of the Change of Control  referred  to above.  Further,  in order for it to be a
Constructive  Termination,  either  (i) or (ii) above  must be  followed  within
ninety (90) days with the resignation of the Employee.

     A change in the Employee's  title or a transfer to a different  division or
subsidiary,  whether  publicly  or  privately  held,  shall not in and of itself
constitute an Action. Rather, the focus turns on the substance of the Employee's
duties.

     (d)  "Effective  Date," as used  herein,  shall mean the first date  during
which a Change of Control (as defined in Section 1(b)) occurs.

     2. Change of Control in a Transaction with a Private Company.  In the event
a Change of Control  occurs as the result of a  transaction  between  SPSS and a
company whose common stock is not publicly  traded on a domestic  national stock
exchange,  the  NASDAQ  national  market,  or  their  respective  successors  or
equivalents  (a  "Private  Company"),  the  Employee  shall  have the rights and
benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence  of Change of  Control
between  SPSS and a  Private  Company,  the  Employee  is  hired  for at least a
one-year period,  with an employment package equal to or greater than the larger
of (i) the total cash  compensation  received by the Employee in the immediately
preceding full fiscal year or (ii) two times the Employee's base salary received
in the  immediately  preceding  fiscal year, all of Employee stock options shall
vest on the  Effective  Date on which the Change of Control  occurs and shall be
cashed out at the transaction  value on the occurrence of the  transaction  with
the Private Company on or within ninety (90) days following a Change of Control.
If Employee  shall be hired with an employment  package equal to or greater than
the  larger of (i) the total  cash  compensation  received  by  Employee  in the
preceding  fiscal year or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year,  Employee  shall receive an employment
agreement which provides for the following upon involuntary  termination without
cause or Constructive Termination after the Effective Date of the Change

                                                       - 2 -

<PAGE>


of Control and within two (2) years after the Change of Control: (1) a severance
package equal to the greater of (i) the aggregate cash compensation  received in
the  immediately  preceding  fiscal year or (ii) two times the  Employee's  base
salary received in the immediately  preceding  fiscal year; and (2) in the event
of a Constructive  Termination,  the option to terminate  employment while still
receiving the severance  package  referred to in 2(a)(1)  above.  If Employee is
hired  for a period  of less  than one  year,  the  provisions  of  Constructive
Termination apply.

     (b)  Involuntary  Termination;  Constructive  Termination  Upon a Change of
Control.  If upon the occurrence of Change of Control between SPSS and a Private
Company, there is either an involuntary termination of Employee without Cause or
Constructive  Termination,  the vesting of all Employee  stock  options shall be
accelerated  to the  Effective  Date on which the Change of  Control  occurs and
shall  be  cashed  out  at  the  transaction  value  on  the  occurrence  of the
transaction  with the  Private  Company on or within  ninety  (90) days from the
occurrence  of the  Change of  Control.  Employee  shall  receive a one (1) year
severance  package equal to the greater of (i) the Employee's cash  compensation
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the fiscal year immediately preceding the year of the Effective Date of a Change
of Control.

     (c)  Voluntary  Resignation.  If upon the  occurrence  of Change of Control
between  SPSS  and a  Private  Company,  Employee  voluntarily  resigns,  all of
Employee's  unvested SPSS stock options shall be forfeited and all of Employee's
vested options shall be cashed out at the transaction value on the occurrence of
the transaction with the Private Company on or within ninety (90) days following
a Change of Control.

     3. Change of Control in a Transaction With a Public Company. In the event a
Change of  Control  occurs  between  SPSS and a company  whose  common  stock is
publicly  traded on the domestic  national stock  exchange,  the NASDAQ national
market, or their respective successors and equivalents (a "Public Company"), the
Employee shall have the rights and benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence of a Change of Control
between SPSS and a Public Company, the Employee is hired for at least a one-year
period,  with an  employment  package equal to or greater than the larger of (i)
the  total  cash  compensation  received  by the  Employee  in  the  immediately
preceding  year or (ii) two times the  Employee's  base  salary  received in the
immediately  preceding fiscal year, all of Employee's stock options shall either
(i) vest on the Effective  Date on which the Change of Control  occurs and shall
be cashed out at the transaction value on or within ninety (90) days following a
Change  of  Control;  or (ii)  shall be  converted  into  stock  options  of the
acquiring   Public   Company  on   substantially   equivalent   economic   terms
("Replacement Options"). If Replacement Options are granted, they shall continue
to vest at the same rate as under the SPSS  Option  Plan  prior to the Change of
Control.  If  Employee  shall be hired for at least a  one-year  period,  by the
acquiring Public Company with an employment package equal to or

                                     - 3 -
<PAGE>


greater  than the  larger  of (i) the total  cash  compensation  which  Employee
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year,  Employee  shall receive an employment
agreement  which  provides the following  upon the  occurrence of an involuntary
termination  without Cause or Constructive  Termination after the Effective Date
of the Change of Control  and within two (2) years  after the Change of Control:
(1) a  severance  package  equal  to the  greater  of  (i)  the  aggregate  cash
compensation received in the immediately preceding fiscal year or (ii) two times
the Employee's base salary received in the  immediately  preceding  fiscal year;
(2)  immediate  accelerated  vesting  of  all  previously  unvested  Replacement
Options;  and (3) in the  event of a  Constructive  Termination,  the  option to
terminate  employment while still receiving the severance package referred to in
3(a)(i)  above.  If  Employee  is hired for a period  less  than one  year,  the
provisions of Constructive Termination apply.

     If a Constructive  Termination or an involuntary  Termination without Cause
occurs two (2) years or more after the  Effective  Date of a Change of  Control,
the vesting of all previously unvested  Replacement Options shall be accelerated
to the date on which the Employee is subject to a  Constructive  Termination  or
involuntary termination.

     (b)  Involuntary  Termination/Constructive  Termination  Upon a  Change  of
Control.  If,  upon the  occurrence  of a Change of Control  between  SPSS and a
Public Company there is either an involuntary termination of an Employee without
Cause or a  Constructive  Termination  of  Employee,  (i) the  vesting of all of
Employee's stock options shall be accelerated to the Effective Date on which the
Change of  Control  occurs,  and shall be cashed  out at the  Change of  Control
transaction  value or must be exercised by Employee within ninety (90) days from
the  occurrence  of a Change of Control (if there is a Change of Control with no
transaction)  and (ii) Employee shall receive a one (1) year  severance  package
equal to the  greater of (A) the cash  compensation  received by Employee in the
fiscal year immediately  preceding the year of the Effective Date of a Change of
Control or (B) two times the Employee's  base salary received in the fiscal year
immediately preceding the year of the Effective Date of a Change of Control.

     (c) Voluntary Resignation on Change of Control. If upon the occurrence of a
Change  of  Control  between  SPSS and a Public  Company,  Employee  voluntarily
resigns,  at the  time of the  Effective  Date of the  Change  of  Control,  all
unvested SPSS stock options held by Employee shall be forfeited,  and all vested
options shall be cashed out at the Change of Control  transaction  value or must
be exercised by Employee  within  ninety (90) days from the  occurrence  of such
Change of Control (if there is a Change of Control with no transaction).

     4. Health and Welfare Benefits.  Notwithstanding the rights and obligations
as outlined in Sections 2 or 3 above,  if Employee is  involuntarily  terminated
without  Cause or is  subject  to a  Constructive  Termination  on or after  the
Effective  Date of a Change  of  Control  or  within  the later of two (2) years
following the Effective Date of a

                                     - 5 -

<PAGE>


Change of Control in addition to the  benefits set forth above in Sections 2 and
3, the Employee shall continue to receive, at the cost of the employer, the same
health and welfare benefits (in effect at any time one hundred twenty (120) days
prior to the Effective Date of a Change of Control), but only to the extent each
plan which governs the benefits permits  participation by terminated  employees,
for a  period  of  eighteen  (18)  months  following  the  date  of  involuntary
termination without Cause or Constructive Termination.

     5. Non-Compete.

     (a) Employee hereby  covenants and agrees that during the period of time he
collects a severance package,  he shall not (i) directly or indirectly  (whether
through a  partnership  of which the  Employee is a partner or through any other
individual or entity in which  Employee has any interest,  legal or  equitable),
engage in any business  competitive  with the business of SPSS (ii)  directly or
indirectly  (whether  through a  partnership  of which  Employee is a partner or
through any other individual or entity in which Employee has any interest, legal
or  equitable),  solicit or  otherwise  engage with any  customers or clients of
SPSS,  in any  transactions  which are in direct  competition  with the software
business of SPSS which SPSS did or could have engaged in with those customers or
clients, or (iii) directly or indirectly (whether through a partnership of which
Employee  is a  partner  or  through  any  other  individual  or entity in which
Employee  has any  interest,  legal or  equitable),  assist  any  person  in the
development,  programming, servicing, maintenance, manufacture, sale, licensing,
distribution or marketing (including,  without limitation, giving away software)
of software and related  products in competition  with SPSS'  products,  in each
case  in the  United  States  of  America  or any  country  where  SPSS,  or its
subsidiaries  or affiliates are doing business with respect to SPSS products and
services and in each case excluding  passive  investment  interests of less than
two percent (2%) in corporations  whose stock is registered under the Securities
Exchange Act of 1934, as amended.

     (b) Employee  understands  that a breach by him of this Section 5 may cause
substantial injury to SPSS, which may be irreparable and/or in amounts difficult
or impossible to ascertain, and that in the event Employee breaches this Section
5, SPSS shall have, in addition to all other remedies  available in the event of
a breach of this Agreement,  the right to injunctive or other equitable  relief.
Further,  Employee acknowledges and agrees that the restrictions and commitments
set forth in this Agreement are necessary to protect SPSS' legitimate  interests
and are  reasonable  in  scope,  area  and  time,  and  that  if,  despite  this
acknowledgment and agreement, at the time of the enforcement of any provision of
this Agreement a court of competent  jurisdiction  shall hold that the period or
scope of such provision is unreasonable  under the circumstances  then existing,
the  maximum  reasonable  period  or scope  under  such  circumstances  shall be
substituted for the period or scope stated in such provision.

     (c) Should  Employee  breach this Section 5, all severance  payments  shall
cease  immediately,  and SPSS shall be  entitled  to pursue all other  available
legal or equitable remedies.

                                     - 6 -

<PAGE>


     (d) For  purposes of Section 5, where the context  admits,  the term "SPSS"
includes SPSS Inc.,  its  subsidiaries  and all of their  respective  affiliated
entities and their successors and assigns.

     6.  Governing  Law.  This  Agreement  shall be governed by and construed in
accordance with the laws of the State of Illinois  applicable to agreements made
and to be  performed  in  Illinois,  without  giving  effect to conflicts of law
principles.

     7. Headings.  The section headings of this Agreement are for reference only
and are to be given no  effect in the  construction  or  interpretation  of this
Agreement.

     8.  Severability.  If any  part or  provision  of this  Agreement  shall be
declared  invalid or unenforceable  by a court of competent  jurisdiction,  said
provision  or part  shall be  ineffective  to the extent of such  invalidity  or
unenforceability  only,  without in any way  affecting  the  remaining  parts or
provisions of this Agreement.

     9. Waiver.  Any party may waive compliance by another party with any of the
provisions of this Agreement. No waiver of any provision shall be construed as a
waiver of any other provision. Any waiver must be in writing.

     10. Binding  Effect;  Assignment.  This  Agreement  shall be binding on and
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted assigns. Nothing in this Agreement shall create or be deemed to create
any third  party  beneficiary  rights in any  person  or entity  (including  any
employee  or  person  engaged  by SPSS  in any  capacity)  not a  party  to this
Agreement.  SPSS will require any  successor  (whether  direct or  indirect,  by
merger,  purchase,  consolidation  or  otherwise)  of SPSS  to  make an  express
assumption of the obligations  hereunder and cause any successor (whether direct
or indirect, by merger,  purchase,  consolidation or otherwise) of SPSS to agree
to perform all parts and provisions  under this Agreement in the same manner and
to the  same  extent  that  SPSS  would be  required  to  perform  it if no such
succession had taken place.

     11.   Counterparts.   This  Agreement  may  be  signed  in  any  number  of
counterparts and all such  counterparts  shall be read together and construed as
but one and the same document.

     12.  Notices.  All notices and other  communications  under this  Agreement
shall be in writing and shall be deemed given when delivered personally, one day
after sent by recognized  overnight  courier,  or five (5) days after deposit in
the United States mail,  postage prepaid,  registered or certified mail,  return
receipt requested,  to the parties at the following  addresses (or to such other
address as a party may have specified by notice duly given to the other party in
accordance with this provision):


                                      - 7 -

<PAGE>


     If to the Employee:

     At the Employee's  then current  business or residence  address as shown on
the records of SPSS,  with a copy to such other  person as the Employee may have
specified by notice duly given to SPSS in accordance with this provision.

     If to SPSS:

                           SPSS Inc.
                           444 N. Michigan Avenue
                           Chicago, Illinois 60611

                           Attention: President

     With a copy to:

                           Ross & Hardies
                           150 N. Michigan Avenue
                           Chicago, Illinois 60601-7567

                           Attention:  Lawrence R. Samuels, Esq.


     IN WITNESS  WHEREOF the parties have  executed  this  Agreement on the date
first written above.


                                                     Employee

                                                     /s/MARK BATTAGLIA
                                                     MARK BATTAGLIA


                                                     SPSS Inc.


                                                     By:/s/JACK NOONAN
                                                     Name:  Jack Noonan
                                                     Its:   President and Chief
                                                            Executive Officer


                                     - 8 -




                                                                    EXHIBIT 10.6

                                SENIOR MANAGEMENT
                       CHANGE OF CONTROL AGREEMENT BETWEEN
                                 IAN DURRELL AND
                                    SPSS INC.


     THIS  CHANGE  OF  CONTROL   AGREEMENT,   dated  as  of  May  1,  1998  (the
"Agreement"),  is by and between  SPSS Inc., a Delaware  corporation  having its
principal offices at 444 N. Michigan Avenue, Chicago,  Illinois 60611 ("SPSS" or
the  "Company"),  and Ian  Durrell,  a senior  management  employee of SPSS (the
"Employee").

     WHEREAS,  the Employee is presently serving as the Executive Vice President
Premier Accounts Group of SPSS; and

     WHEREAS, SPSS desires to continue the Employee's services as Executive Vice
President  Premier  Accounts Group and to provide the Employee with the benefits
set forth herein in consideration of the Employee's  continued  employment,  and
the  Employee is willing to continue his  employment  as an employee of SPSS and
enter into this Agreement on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants and
conditions  contained  herein and other  good and  valuable  consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties  hereto
agree as follows:

     1. Certain Defined Terms.

     (a)  "Cause"  shall mean  material  nonperformance  by the  Employee of the
Employee's  duties or material  injury or harm to the  Company or its  successor
caused by the Employee.

     (b) "Change of Control," as used herein,  shall mean any one or more of the
following: (i) the accumulation,  by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities  Exchange Act of 1934,
as amended  (the  "Exchange  Act")) not  previously  owning  common stock of the
Company,  of Fifteen Percent (15%) or more of the shares of the then outstanding
common  stock  of SPSS  (the  "Outstanding  Common  Stock"),  (ii) a  merger  or
consolidation  of SPSS in which SPSS does not survive as an  independent  public
company,  (iii) a sale of all or substantially all of the assets of SPSS, (iv) a
triggering event under any Rights Agreement of SPSS, as such agreement may exist
from  time to time,  or (v) a  liquidation  or  dissolution  of SPSS;  provided,
however,  that the  following  acquisitions  shall  not  constitute  a Change of
Control for the purposes of this  subsection  (a): (i) any acquisition of common
stock or securities  convertible  into common stock  directly from SPSS, or (ii)
any acquisition of common stock or securities  convertible  into common stock by
any employee benefit plan (or related trust) sponsored or maintained by SPSS.

<PAGE>


     (c) "Constructive Termination," as used herein, shall mean (i) a reduction,
for a reason other than Cause,  in annualized  cash  compensation by 20% or more
(compared to the cash  compensation  which the  Employee  received in the fiscal
year  immediately  preceding  the  year of the  Effective  Date of a  Change  of
Control)  which occurs during any twelve month period  beginning on or after the
Effective Date of any Change of Control referred to above and ending on or prior
to the later of (x) the second  anniversary  date of the  Effective  Date of any
Change of Control  referred to above or (y) the last day of vesting for any SPSS
options  then  held by the  Employee  which  options  have not  vested as of the
Effective  Date of any Change of Control  referred to above;  or (ii) any action
(an  "Action"),  for a reason  other  than  Cause,  by SPSS  which  results in a
diminution in any material respect of the Employee's position, authority, duties
or  responsibilities as the same existed immediately prior to the Effective Date
of the Change of Control  referred  to above.  Further,  in order for it to be a
Constructive  Termination,  either  (i) or (ii) above  must be  followed  within
ninety (90) days with the resignation of the Employee.


     A change in the Employee's  title or a transfer to a different  division or
subsidiary,  whether  publicly  or  privately  held,  shall not in and of itself
constitute an Action. Rather, the focus turns on the substance of the Employee's
duties.

     (d)  "Effective  Date," as used  herein,  shall mean the first date  during
which a Change of Control (as defined in Section 1(b)) occurs.

     2. Change of Control in a Transaction with a Private Company.  In the event
a Change of Control  occurs as the result of a  transaction  between  SPSS and a
company whose common stock is not publicly  traded on a domestic  national stock
exchange,  the  NASDAQ  national  market,  or  their  respective  successors  or
equivalents  (a  "Private  Company"),  the  Employee  shall  have the rights and
benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence  of Change of  Control
between  SPSS and a  Private  Company,  the  Employee  is  hired  for at least a
one-year period,  with an employment package equal to or greater than the larger
of (i) the total cash  compensation  received by the Employee in the immediately
preceding full fiscal year or (ii) two times the Employee's base salary received
in the  immediately  preceding  fiscal year, all of Employee stock options shall
vest on the  Effective  Date on which the Change of Control  occurs and shall be
cashed out at the transaction  value on the occurrence of the  transaction  with
the Private Company on or within ninety (90) days following a Change of Control.
If Employee  shall be hired with an employment  package equal to or greater than
the  larger of (i) the total  cash  compensation  received  by  Employee  in the
preceding  fiscal year or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year,  Employee  shall receive an employment
agreement which provides for the following upon involuntary  termination without
cause or  Constructive  Termination  after the  Effective  Date of the Change of
Control and within two (2) years  after the Change of  Control:  (1) a severance
package equal to the greater of (i) the aggregate cash compensation  received in
the immediately

                                      - 2 -
<PAGE>


preceding  fiscal year or (ii) two times the Employee's  base salary received in
the  immediately  preceding  fiscal year; and (2) in the event of a Constructive
Termination,  the option to  terminate  employment  while  still  receiving  the
severance  package  referred  to in 2(a)(1)  above.  If  Employee is hired for a
period of less than one year, the provisions of Constructive Termination apply.

     (b)  Involuntary  Termination;  Constructive  Termination  Upon a Change of
Control.  If upon the occurrence of Change of Control between SPSS and a Private
Company, there is either an involuntary termination of Employee without Cause or
Constructive  Termination,  the vesting of all Employee  stock  options shall be
accelerated  to the  Effective  Date on which the Change of  Control  occurs and
shall  be  cashed  out  at  the  transaction  value  on  the  occurrence  of the
transaction  with the  Private  Company on or within  ninety  (90) days from the
occurrence  of the  Change of  Control.  Employee  shall  receive a one (1) year
severance  package equal to the greater of (i) the Employee's cash  compensation
received in the fiscal year immediately preceding the year of the Effective Date
of a Change of Control or (ii) two times the Employee's  base salary received in
the fiscal year immediately preceding the year of the Effective Date of a Change
of Control.

     (c)  Voluntary  Resignation.  If upon the  occurrence  of Change of Control
between  SPSS  and a  Private  Company,  Employee  voluntarily  resigns,  all of
Employee's  unvested SPSS stock options shall be forfeited and all of Employee's
vested options shall be cashed out at the transaction value on the occurrence of
the transaction with the Private Company on or within ninety (90) days following
a Change of Control.

     3. Change of Control in a Transaction With a Public Company. In the event a
Change of  Control  occurs  between  SPSS and a company  whose  common  stock is
publicly  traded on the domestic  national stock  exchange,  the NASDAQ national
market, or their respective successors and equivalents (a "Public Company"), the
Employee shall have the rights and benefits set forth below:

     (a)  Continued  Employment.  If upon the  occurrence of a Change of Control
between SPSS and a Public Company, the Employee is hired for at least a one-year
period,  with an  employment  package equal to or greater than the larger of (i)
the  total  cash  compensation  received  by the  Employee  in  the  immediately
preceding  year or (ii) two times the  Employee's  base  salary  received in the
immediately  preceding fiscal year, all of Employee's stock options shall either
(i) vest on the Effective  Date on which the Change of Control  occurs and shall
be cashed out at the transaction value on or within ninety (90) days following a
Change  of  Control;  or (ii)  shall be  converted  into  stock  options  of the
acquiring   Public   Company  on   substantially   equivalent   economic   terms
("Replacement Options"). If Replacement Options are granted, they shall continue
to vest at the same rate as under the SPSS  Option  Plan  prior to the Change of
Control.  If  Employee  shall be hired for at least a  one-year  period,  by the
acquiring Public Company with an employment package equal to or greater than the
larger of (i) the total cash compensation  which Employee received in the fiscal
year immediately preceding the year of the Effective Date of a Change of Control
or

                                      - 3 -

<PAGE>


(ii) two times the Employee's base salary received in the immediately  preceding
fiscal year,  Employee shall receive an employment  agreement which provides the
following  upon the occurrence of an  involuntary  termination  without Cause or
Constructive  Termination  after the Effective Date of the Change of Control and
within two (2) years after the Change of Control:  (1) a severance package equal
to  the  greater  of  (i)  the  aggregate  cash  compensation  received  in  the
immediately  preceding  fiscal year or (ii) two times the Employee's base salary
received in the  immediately  preceding  fiscal year; (2) immediate  accelerated
vesting of all previously unvested  Replacement Options; and (3) in the event of
a  Constructive  Termination,  the option to  terminate  employment  while still
receiving the severance  package  referred to in 3(a)(i)  above.  If Employee is
hired  for  a  period  less  than  one  year,  the  provisions  of  Constructive
Termination apply.

     If a Constructive  Termination or an involuntary  Termination without Cause
occurs two (2) years or more after the  Effective  Date of a Change of  Control,
the vesting of all previously unvested  Replacement Options shall be accelerated
to the date on which the Employee is subject to a  Constructive  Termination  or
involuntary termination.

     (b)  Involuntary  Termination/Constructive  Termination  Upon a  Change  of
Control.  If,  upon the  occurrence  of a Change of Control  between  SPSS and a
Public Company there is either an involuntary termination of an Employee without
Cause or a  Constructive  Termination  of  Employee,  (i) the  vesting of all of
Employee's stock options shall be accelerated to the Effective Date on which the
Change of  Control  occurs,  and shall be cashed  out at the  Change of  Control
transaction  value or must be exercised by Employee within ninety (90) days from
the  occurrence  of a Change of Control (if there is a Change of Control with no
transaction)  and (ii) Employee shall receive a one (1) year  severance  package
equal to the  greater of (A) the cash  compensation  received by Employee in the
fiscal year immediately  preceding the year of the Effective Date of a Change of
Control or (B) two times the Employee's  base salary received in the fiscal year
immediately preceding the year of the Effective Date of a Change of Control.

     (c) Voluntary Resignation on Change of Control. If upon the occurrence of a
Change  of  Control  between  SPSS and a Public  Company,  Employee  voluntarily
resigns,  at the  time of the  Effective  Date of the  Change  of  Control,  all
unvested SPSS stock options held by Employee shall be forfeited,  and all vested
options shall be cashed out at the Change of Control  transaction  value or must
be exercised by Employee  within  ninety (90) days from the  occurrence  of such
Change of Control (if there is a Change of Control with no transaction).

     4. Health and Welfare Benefits.  Notwithstanding the rights and obligations
as outlined in Sections 2 or 3 above,  if Employee is  involuntarily  terminated
without  Cause or is  subject  to a  Constructive  Termination  on or after  the
Effective  Date of a Change  of  Control  or  within  the later of two (2) years
following the Effective  Date of a Change of Control in addition to the benefits
set forth above in Sections 2 and 3, the Employee shall continue to receive,  at
the cost of the employer, the same health and welfare

                                      - 4 -

<PAGE>


benefits  (in  effect at any time one  hundred  twenty  (120)  days prior to the
Effective  Date of a Change of Control),  but only to the extent each plan which
governs the benefits permits participation by terminated employees, for a period
of eighteen (18) months  following the date of involuntary  termination  without
Cause or Constructive Termination.

     5. Non-Compete.

     (a) Employee hereby  covenants and agrees that during the period of time he
collects a severance package,  he shall not (i) directly or indirectly  (whether
through a  partnership  of which the  Employee is a partner or through any other
individual or entity in which  Employee has any interest,  legal or  equitable),
engage in any business  competitive  with the business of SPSS (ii)  directly or
indirectly  (whether  through a  partnership  of which  Employee is a partner or
through any other individual or entity in which Employee has any interest, legal
or  equitable),  solicit or  otherwise  engage with any  customers or clients of
SPSS,  in any  transactions  which are in direct  competition  with the software
business of SPSS which SPSS did or could have engaged in with those customers or
clients, or (iii) directly or indirectly (whether through a partnership of which
Employee  is a  partner  or  through  any  other  individual  or entity in which
Employee  has any  interest,  legal or  equitable),  assist  any  person  in the
development,  programming, servicing, maintenance, manufacture, sale, licensing,
distribution or marketing (including,  without limitation, giving away software)
of software and related  products in competition  with SPSS'  products,  in each
case  in the  United  States  of  America  or any  country  where  SPSS,  or its
subsidiaries  or affiliates are doing business with respect to SPSS products and
services and in each case excluding  passive  investment  interests of less than
two percent (2%) in corporations  whose stock is registered under the Securities
Exchange Act of 1934, as amended.

     (b) Employee  understands  that a breach by him of this Section 5 may cause
substantial injury to SPSS, which may be irreparable and/or in amounts difficult
or impossible to ascertain, and that in the event Employee breaches this Section
5, SPSS shall have, in addition to all other remedies  available in the event of
a breach of this Agreement,  the right to injunctive or other equitable  relief.
Further,  Employee acknowledges and agrees that the restrictions and commitments
set forth in this Agreement are necessary to protect SPSS' legitimate  interests
and are  reasonable  in  scope,  area  and  time,  and  that  if,  despite  this
acknowledgment and agreement, at the time of the enforcement of any provision of
this Agreement a court of competent  jurisdiction  shall hold that the period or
scope of such provision is unreasonable  under the circumstances  then existing,
the  maximum  reasonable  period  or scope  under  such  circumstances  shall be
substituted for the period or scope stated in such provision.

     (c) Should  Employee  breach this Section 5, all severance  payments  shall
cease  immediately,  and SPSS shall be  entitled  to pursue all other  available
legal or equitable remedies.


                                      - 5 -

<PAGE>


     (d) For  purposes of Section 5, where the context  admits,  the term "SPSS"
includes SPSS Inc.,  its  subsidiaries  and all of their  respective  affiliated
entities and their successors and assigns.

     6.  Governing  Law.  This  Agreement  shall be governed by and construed in
accordance with the laws of the State of Illinois  applicable to agreements made
and to be  performed  in  Illinois,  without  giving  effect to conflicts of law
principles.

     7. Headings.  The section headings of this Agreement are for reference only
and are to be given no  effect in the  construction  or  interpretation  of this
Agreement.

     8.  Severability.  If any  part or  provision  of this  Agreement  shall be
declared  invalid or unenforceable  by a court of competent  jurisdiction,  said
provision  or part  shall be  ineffective  to the extent of such  invalidity  or
unenforceability  only,  without in any way  affecting  the  remaining  parts or
provisions of this Agreement.

     9. Waiver.  Any party may waive compliance by another party with any of the
provisions of this Agreement. No waiver of any provision shall be construed as a
waiver of any other provision. Any waiver must be in writing.

     10. Binding  Effect;  Assignment.  This  Agreement  shall be binding on and
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted assigns. Nothing in this Agreement shall create or be deemed to create
any third  party  beneficiary  rights in any  person  or entity  (including  any
employee  or  person  engaged  by SPSS  in any  capacity)  not a  party  to this
Agreement.  SPSS will require any  successor  (whether  direct or  indirect,  by
merger,  purchase,  consolidation  or  otherwise)  of SPSS  to  make an  express
assumption of the obligations  hereunder and cause any successor (whether direct
or indirect, by merger,  purchase,  consolidation or otherwise) of SPSS to agree
to perform all parts and provisions  under this Agreement in the same manner and
to the  same  extent  that  SPSS  would be  required  to  perform  it if no such
succession had taken place.

     11.   Counterparts.   This  Agreement  may  be  signed  in  any  number  of
counterparts and all such  counterparts  shall be read together and construed as
but one and the same document.

     12.  Notices.  All notices and other  communications  under this  Agreement
shall be in writing and shall be deemed given when delivered personally, one day
after sent by recognized  overnight  courier,  or five (5) days after deposit in
the United States mail,  postage prepaid,  registered or certified mail,  return
receipt requested,  to the parties at the following  addresses (or to such other
address as a party may have specified by notice duly given to the other party in
accordance with this provision):


                                      - 6 -

<PAGE>


     If to the Employee:

     At the Employee's  then current  business or residence  address as shown on
the records of SPSS,  with a copy to such other  person as the Employee may have
specified by notice duly given to SPSS in accordance with this provision.

     If to SPSS:

                           SPSS Inc.
                           444 N. Michigan Avenue
                           Chicago, Illinois 60611

                           Attention: President

     With a copy to:

                           Ross & Hardies
                           150 N. Michigan Avenue
                           Chicago, Illinois 60601-7567

                           Attention:  Lawrence R. Samuels, Esq.


     IN WITNESS  WHEREOF the parties have  executed  this  Agreement on the date
first written above.


                                                     Employee



                                                     /s/IAM DURRELL
                                                     IAN DURRELL



                                                     SPSS Inc.


                                                     By:/s/JACK NOONAN
                                                     Name:  Jack Noonan
                                                     Its:   President and Chief
                                                            Executive Officer


                                      - 7 -





                                                                    Exhibit 15.1




                          Acknowledgment of Independent
                          Certified Public Accountants
                  Regarding Independent Auditors' Review Report


The Board of Directors
SPSS Inc.:

With  respect  to the  Registration  Statements  on Form  S-8  (nos.  33-325869,
33-73130,  33- 80799,  33-73120,  and 33-74402) of SPSS Inc., we acknowledge our
awareness  of the use therein of our report  dated April 28, 1998 related to our
review of interim financial information.

Pursuant to Rule 436(c)  under the  Securities  Act of 1933,  such report is not
considered part of a registration  statement prepared or certified by an account
or a report  prepared  or  certified  by an  accountant  within  the  meaning of
sections 7 and 11 of the Act.




                  /s/ KPMG Peat Marwick LLP



Chicago, Illinois
May 13, 1998

                                    

WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE  CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM SPSS INC.
AND SUBSIDIARIES  CONSOLIDATED  BALANCE SHEET AT MARCH 31, 1998 AND CONSOLIDATED
STATEMENT  OF INCOME FOR THE THREE  MONTHS ENDED MARCH 31, 1998 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>                         0000869570
<NAME>                        SPSS INC.

       
<S>                                                <C>                       <C>
<PERIOD-TYPE>                                   3-MOS                      12-MOS
<FISCAL-YEAR-END>                              DEC-31-1998                 DEC-31-1998
<PERIOD-END>                                   MAR-31-1998                 DEC-31-1998

<CASH>                                                  0                     8,735
<SECURITIES>                                            0                         0
<RECEIVABLES>                                           0                    28,768
<ALLOWANCES>                                            0                     1,879
<INVENTORY>                                             0                     3,006
<CURRENT-ASSETS>                                        0                    41,087
<PP&E>                                                  0                    30,317
<DEPRECIATION>                                          0                    19,852
<TOTAL-ASSETS>                                          0                    64,109
<CURRENT-LIABILITIES>                                   0                    24,714
<BONDS>                                                 0                         0
                                   0                         0
                                             0                         0
<COMMON>                                                0                        89
<OTHER-SE>                                              0                    36,182
<TOTAL-LIABILITY-AND-EQUITY>                            0                    64,109
<SALES>                                            28,500                    28,500
<TOTAL-REVENUES>                                   28,500                    28,500
<CGS>                                               2,435                     2,435
<TOTAL-COSTS>                                       2,435                     2,435
<OTHER-EXPENSES>                                   21,020                    21,020
<LOSS-PROVISION>                                      107                       107
<INTEREST-EXPENSE>                                     43                        43
<INCOME-PRETAX>                                     4,911                     4,911
<INCOME-TAX>                                        1,685                     1,685
<INCOME-CONTINUING>                                 3,226                     3,226
<DISCONTINUED>                                          0                         0
<EXTRAORDINARY>                                         0                         0
<CHANGES>                                               0                         0
<NET-INCOME>                                        3,226                     3,226
<EPS-PRIMARY>                                        0.36                      0.36
<EPS-DILUTED>                                        0.34                      0.34
        
 

</TABLE>

<TABLE> <S> <C>

<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE  CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM SPSS INC.
AND SUBSIDIARIES  CONSOLIDATED  BALANCE SHEET AT MARCH 31, 1997 AND CONSOLIDATED
STATEMENT  OF INCOME FOR THE THREE  MONTHS ENDED MARCH 31, 1997 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS
</LEGEND>

<CIK>                         0000869570
<NAME>                        SPSS INC.

       
<S>                                                <C>                       <C>
<PERIOD-TYPE>                                   3-MOS                      12-MOS
<FISCAL-YEAR-END>                              DEC-31-1998                 DEC-31-1998
<PERIOD-END>                                   MAR-31-1998                 DEC-31-1998

<CASH>                                                  0                    11,744
<SECURITIES>                                            0                         0
<RECEIVABLES>                                           0                    25,040
<ALLOWANCES>                                            0                     1,769
<INVENTORY>                                             0                     1,786
<CURRENT-ASSETS>                                        0                    39,240
<PP&E>                                                  0                    26,731
<DEPRECIATION>                                          0                    16,078
<TOTAL-ASSETS>                                          0                    62,962
<CURRENT-LIABILITIES>                                   0                    28,618
<BONDS>                                                 0                         0
                                   0                         0
                                             0                         0
<COMMON>                                                0                        87
<OTHER-SE>                                              0                    30,729
<TOTAL-LIABILITY-AND-EQUITY>                            0                    62,962
<SALES>                                            27,312                    27,312
<TOTAL-REVENUES>                                   27,312                    27,312
<CGS>                                               2,589                     2,589
<TOTAL-COSTS>                                       2,589                     2,589
<OTHER-EXPENSES>                                   20,293                    20,293
<LOSS-PROVISION>                                       26                        26
<INTEREST-EXPENSE>                                     42                        42
<INCOME-PRETAX>                                     4,517                     4,517
<INCOME-TAX>                                        1,603                     1,603
<INCOME-CONTINUING>                                 2,914                     2,914
<DISCONTINUED>                                          0                         0
<EXTRAORDINARY>                                         0                         0
<CHANGES>                                               0                         0
<NET-INCOME>                                        2,914                     2,914
<EPS-PRIMARY>                                        0.33                      0.33
<EPS-DILUTED>                                        0.30                      0.30
        


</TABLE>


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