<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>                                          17,437
<SECURITIES>                                    22,967
<RECEIVABLES>                                   19,747
<ALLOWANCES>                                     1,840
<INVENTORY>                                     11,244
<CURRENT-ASSETS>                                82,788
<PP&E>                                          34,341
<DEPRECIATION>                                  20,910
<TOTAL-ASSETS>                                 126,532
<CURRENT-LIABILITIES>                           32,841
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            18
<OTHER-SE>                                      93,673
<TOTAL-LIABILITY-AND-EQUITY>                   126,532
<SALES>                                         23,565
<TOTAL-REVENUES>                                23,565
<CGS>                                            8,104
<TOTAL-COSTS>                                    8,104
<OTHER-EXPENSES>                                18,470
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  17
<INCOME-PRETAX>                                (2,311)
<INCOME-TAX>                                     (717)
<INCOME-CONTINUING>                            (1,594)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (1,594)
<EPS-PRIMARY>                                   (0.09)
<EPS-DILUTED>                                   (0.09)