<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated balance sheet, consolidate statement of operations and consolidated
statement of suchflows included in the C ompany's form 10-Q for the period
ended June 30, 1998, and is qualified in tis entirety by reference to such
financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                              JAN-1-1998
<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>                                 117,900
<CURRENT-LIABILITIES>                           29,971
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            18
<OTHER-SE>                                      87,911
<TOTAL-LIABILITY-AND-EQUITY>                   117,900
<SALES>                                         47,512
<TOTAL-REVENUES>                                47,512
<CGS>                                           21,660
<TOTAL-COSTS>                                   21,660
<OTHER-EXPENSES>                                38,738
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  66
<INCOME-PRETAX>                                (12,886)
<INCOME-TAX>                                    (4,654)
<INCOME-CONTINUING>                             (6,745)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    (6,745)
<EPS-PRIMARY>                                   ($0.38)
<EPS-DILUTED>                                   ($0.38)