<ARTICLE>                                           5
<LEGEND>                                                        
     (This schedule  contains summary financial  information  extracted from the
Consolidated  Balance Sheet and  Statements of Income filed as part of the March
31, 1999 Form 10-Q and is qualified in its entirety by reference to such report)
</LEGEND>                                                          
<MULTIPLIER>                                                  1000 
                                                     
                                                 
<PERIOD-TYPE>                                       3-MOS
<FISCAL-YEAR-END>                                   Dec-31-1999
<PERIOD-START>                                      Jan-01-1999    
<PERIOD-END>                                        Mar-31-1999
<CASH>                                                      61,244
<SECURITIES>                                                52,492
<RECEIVABLES>                                               50,516
<ALLOWANCES>                                                 3,360
<INVENTORY>                                                 16,304
<CURRENT-ASSETS>                                           190,093
<PP&E>                                                     105,904
<DEPRECIATION>                                              40,644
<TOTAL-ASSETS>                                             264,128
<CURRENT-LIABILITIES>                                       44,525
<BONDS>                                                          0
<PREFERRED-MANDATORY>                                            0
<PREFERRED>                                                      0
<COMMON>                                                       333
<OTHER-SE>                                                 214,788
<TOTAL-LIABILITY-AND-EQUITY>                               264,128
<SALES>                                                     73,686
<TOTAL-REVENUES>                                            73,686
<CGS>                                                       16,940
<TOTAL-COSTS>                                               16,940
<OTHER-EXPENSES>                                            41,580
<LOSS-PROVISION>                                                 0
<INTEREST-EXPENSE>                                              89
<INCOME-PRETAX>                                              15529
<INCOME-TAX>                                                  4969
<INCOME-CONTINUING>                                         10,560
<DISCONTINUED>                                                   0
<EXTRAORDINARY>                                                  0
<CHANGES>                                                     (552)
<NET-INCOME>                                                10,008
<EPS-PRIMARY>                                                  0.3
<EPS-DILUTED>                                                 0.29