<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                          37,642
<SECURITIES>                                    32,391
<RECEIVABLES>                                   47,220
<ALLOWANCES>                                       725
<INVENTORY>                                     15,346
<CURRENT-ASSETS>                               146,293
<PP&E>                                          35,127
<DEPRECIATION>                                  21,716
<TOTAL-ASSETS>                                 209,517
<CURRENT-LIABILITIES>                           40,615
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        93,671
<OTHER-SE>                                      72,918
<TOTAL-LIABILITY-AND-EQUITY>                   209,517
<SALES>                                         32,685
<TOTAL-REVENUES>                                32,685
<CGS>                                           11,349
<TOTAL-COSTS>                                   11,349
<OTHER-EXPENSES>                                22,043
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                    768
<INCOME-TAX>                                       276
<INCOME-CONTINUING>                                492
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       492
<EPS-PRIMARY>                                     0.01<F1>
<EPS-DILUTED>                                     0.01
<FN>
<F1>DATA LISTED FOR "EPS-PRIMARY" IS THE NEWLY DEFINED "BASIC EPS"
</FN>