<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE INCOME STATEMENT FOR THE SIX-MONTH PERIOD
ENDED JUNE 30, 1997, AND THE BALANCE SHEET AS OF JUNE 30,1997, AND IS
QUALIFIED IN ITS ENTIRETY BY REERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          26,132
<SECURITIES>                                         0
<RECEIVABLES>                                   11,666
<ALLOWANCES>                                       530
<INVENTORY>                                      9,711
<CURRENT-ASSETS>                                50,741
<PP&E>                                          17,535
<DEPRECIATION>                                   9,958
<TOTAL-ASSETS>                                  63,465
<CURRENT-LIABILITIES>                            9,215
<BONDS>                                            215
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            75
<OTHER-SE>                                      53,165
<TOTAL-LIABILITY-AND-EQUITY>                    63,465
<SALES>                                         18,834
<TOTAL-REVENUES>                                24,306
<CGS>                                            6,563
<TOTAL-COSTS>                                    8,430
<OTHER-EXPENSES>                                11,720
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  23
<INCOME-PRETAX>                                  4,650
<INCOME-TAX>                                     1,651
<INCOME-CONTINUING>                              2,999
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     2,999
<EPS-PRIMARY>                                      .40
<EPS-DILUTED>                                      .40