<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET, CONSOLIDATED STATEMENT OF OPERATIONS AND
CONSOLIDATED STATEMENT OF CASH FLOWS INCLUDED IN THE COMPANY'S FORM 10-Q FOR THE
PERIOD ENDED JUNE 30, 1998, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          18,034
<SECURITIES>                                    18,995
<RECEIVABLES>                                   18,043
<ALLOWANCES>                                     1,840
<INVENTORY>                                      5,008
<CURRENT-ASSETS>                                71,071
<PP&E>                                          36,056
<DEPRECIATION>                                  22,022
<TOTAL-ASSETS>                                 116,046
<CURRENT-LIABILITIES>                           30,162
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            18
<OTHER-SE>                                      85,866
<TOTAL-LIABILITY-AND-EQUITY>                   116,046
<SALES>                                         47,512
<TOTAL-REVENUES>                                47,512
<CGS>                                           21,660
<TOTAL-COSTS>                                   21,660
<OTHER-EXPENSES>                                38,224
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  66
<INCOME-PRETAX>                               (10,885)
<INCOME-TAX>                                   (4,463)
<INCOME-CONTINUING>                            (6,422)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (6,422)
<EPS-PRIMARY>                                   (0.36)
<EPS-DILUTED>                                   (0.36)