<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 62,995 <SECURITIES> 126,367 <RECEIVABLES> 38,121 <ALLOWANCES> (1,695) <INVENTORY> 9,076 <CURRENT-ASSETS> 255,759 <PP&E> 12,264 <DEPRECIATION> (7,114) <TOTAL-ASSETS> 267,289 <CURRENT-LIABILITIES> 46,544 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 636 <OTHER-SE> 220,109 <TOTAL-LIABILITY-AND-EQUITY> 267,289 <SALES> 26,762 <TOTAL-REVENUES> 116,452 <CGS> 23,093 <TOTAL-COSTS> 23,093 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 75 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 68,761 <INCOME-TAX> 27,504 <INCOME-CONTINUING> 41,257 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 41,257 <EPS-BASIC> 0.66 <EPS-DILUTED> 0.61