<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS 6-MOS <FISCAL-YEAR-END> SEP-30-2000 SEP-30-1999 <PERIOD-START> OCT-01-1999 OCT-01-1998 <PERIOD-END> MAR-31-2000 MAR-31-1999 <CASH> 33,359 81,912 <SECURITIES> 911,628 145,308 <RECEIVABLES> 94,779 70,034 <ALLOWANCES> 6,485 1,000 <INVENTORY> 33,509 26,931 <CURRENT-ASSETS> 836,364 317,502 <PP&E> 162,087 129,506 <DEPRECIATION> 62,043 50,783 <TOTAL-ASSETS> 1,793,073 522,893 <CURRENT-LIABILITIES> 40,050 35,480 <BONDS> 0 0 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 1,642 1,561 <OTHER-SE> 919,197 380,035 <TOTAL-LIABILITY-AND-EQUITY> 1,793,073 522,893 <SALES> 189,390 127,645 <TOTAL-REVENUES> 189,390 127,645 <CGS> 66,619 48,234 <TOTAL-COSTS> 165,901 88,344 <OTHER-EXPENSES> 0 0 <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 1,400 0 <INCOME-PRETAX> 29,966 44,500 <INCOME-TAX> 24,942 14,428 <INCOME-CONTINUING> 5,024 30,122 <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> 5,024 30,122 <EPS-BASIC> .03 .20 <EPS-DILUTED> .03 .18