<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE INCOME
STATEMENT FOR THE SIX-MONTH PERIOD ENDED JUNE 30, 2000, AND THE BALANCE SHEET AS
OF JUNE 30, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          23,018
<SECURITIES>                                     8,571
<RECEIVABLES>                                   14,346
<ALLOWANCES>                                       107
<INVENTORY>                                     12,388
<CURRENT-ASSETS>                                65,077
<PP&E>                                          26,541
<DEPRECIATION>                                  16,302
<TOTAL-ASSETS>                                  82,941
<CURRENT-LIABILITIES>                           11,309
<BONDS>                                            135
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            79
<OTHER-SE>                                      68,327
<TOTAL-LIABILITY-AND-EQUITY>                    82,941
<SALES>                                         28,122
<TOTAL-REVENUES>                                33,078
<CGS>                                           10,934
<TOTAL-COSTS>                                   13,122
<OTHER-EXPENSES>                                15,325
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  14
<INCOME-PRETAX>                                  5,363
<INCOME-TAX>                                     1,716
<INCOME-CONTINUING>                              3,647
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,647
<EPS-BASIC>                                       0.47
<EPS-DILUTED>                                     0.43