<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated balance sheet, consolidated statement of operations and
consolidated statement of cash flows included in the Company's Form 10-Q for the
period ending September 30, 1997, and is qualified in its entirety by reference
to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                          17,390
<SECURITIES>                                    16,223
<RECEIVABLES>                                   27,371
<ALLOWANCES>                                     1,840
<INVENTORY>                                     10,168
<CURRENT-ASSETS>                                77,847
<PP&E>                                          35,329
<DEPRECIATION>                                  24,969
<TOTAL-ASSETS>                                 116,577
<CURRENT-LIABILITIES>                           29,069
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            18
<OTHER-SE>                                      87,490
<TOTAL-LIABILITY-AND-EQUITY>                   116,577
<SALES>                                         77,904
<TOTAL-REVENUES>                                77,904
<CGS>                                           24,039
<TOTAL-COSTS>                                   24,039
<OTHER-EXPENSES>                                71,886
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 232
<INCOME-PRETAX>                               (16,476)
<INCOME-TAX>                                   (7,552)
<INCOME-CONTINUING>                            (8,924)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (8,924)
<EPS-PRIMARY>                                   (0.53)
<EPS-DILUTED>                                   (0.53)