<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 ENDED MARCH 31, 1998, AND IS QUALIFIED IN ITS ENTIRETY BY 
REFERENCE TO SUCH FINANCIAL STATEMENTS. 
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           17437
<SECURITIES>                                     22967
<RECEIVABLES>                                    19747
<ALLOWANCES>                                      1840
<INVENTORY>                                      11244
<CURRENT-ASSETS>                                 82788
<PP&E>                                           34341
<DEPRECIATION>                                   20910
<TOTAL-ASSETS>                                  124421
<CURRENT-LIABILITIES>                            32921
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            18
<OTHER-SE>                                       91482
<TOTAL-LIABILITY-AND-EQUITY>                    124421
<SALES>                                          23565
<TOTAL-REVENUES>                                 23565
<CGS>                                             8104
<TOTAL-COSTS>                                     8104
<OTHER-EXPENSES>                                 18213
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  17
<INCOME-PRETAX>                                 (2054)
<INCOME-TAX>                                     (637)
<INCOME-CONTINUING>                             (1417)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    (1417)
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