<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, 2000 Form 10-Q and is qualified in its entirety by reference to such report)
</LEGEND>

<MULTIPLIER>                                                     1000
<CURRENCY>                                          U.S. Dollar

                                                   
<PERIOD-TYPE>                                       3-MOS
<FISCAL-YEAR-END>                                   Dec-31-2000
<PERIOD-START>                                      Jan-01-2000
<PERIOD-END>                                        Mar-31-2000
<EXCHANGE-RATE>                                                     1
<CASH>                                                         47,788
<SECURITIES>                                                   80,350
<RECEIVABLES>                                                  66,839
<ALLOWANCES>                                                    4,265
<INVENTORY>                                                    25,467
<CURRENT-ASSETS>                                              237,640
<PP&E>                                                        123,884
<DEPRECIATION>                                                 50,720
<TOTAL-ASSETS>                                                329,139
<CURRENT-LIABILITIES>                                          53,967
<BONDS>                                                             0
<PREFERRED-MANDATORY>                                               0
<PREFERRED>                                                         0
<COMMON>                                                          502
<OTHER-SE>                                                    268,095
<TOTAL-LIABILITY-AND-EQUITY>                                  329,139
<SALES>                                                        94,105
<TOTAL-REVENUES>                                               94,105
<CGS>                                                          22,240
<TOTAL-COSTS>                                                  22,240
<OTHER-EXPENSES>                                               53,812
<LOSS-PROVISION>                                                    0
<INTEREST-EXPENSE>                                                106
<INCOME-PRETAX>                                                18,623
<INCOME-TAX>                                                    5,959
<INCOME-CONTINUING>                                            12,664
<DISCONTINUED>                                                      0
<EXTRAORDINARY>                                                     0
<CHANGES>                                                           0
<NET-INCOME>                                                   12,664
<EPS-BASIC>                                                      0.25
<EPS-DILUTED>                                                    0.24