<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, 1996, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<CASH>                                          26,016
<SECURITIES>                                    13,678
<RECEIVABLES>                                   20,954
<ALLOWANCES>                                     1,840
<INVENTORY>                                     10,059
<CURRENT-ASSETS>                                76,414
<PP&E>                                          31,198
<DEPRECIATION>                                  19,384
<TOTAL-ASSETS>                                 103,738
<CURRENT-LIABILITIES>                           25,670
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            14
<OTHER-SE>                                      76,617
<TOTAL-LIABILITY-AND-EQUITY>                   103,738
<SALES>                                         75,584
<TOTAL-REVENUES>                                75,584
<CGS>                                           23,449
<TOTAL-COSTS>                                   23,449
<OTHER-EXPENSES>                                40,672
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 346
<INCOME-PRETAX>                                 12,743
<INCOME-TAX>                                     4,199
<INCOME-CONTINUING>                              8,544
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,544
<EPS-PRIMARY>                                     0.57
<EPS-DILUTED>                                     0.57