<ARTICLE> 5

<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   9-MOS                   9-MOS
<FISCAL-YEAR-END>                          SEP-30-2000             SEP-30-1999
<PERIOD-START>                             OCT-01-1999             OCT-01-1998
<PERIOD-END>                               JUN-30-2000             JUN-30-1999
<CASH>                                         322,409                  89,941
<SECURITIES>                                   134,240                 110,245
<RECEIVABLES>                                  107,550                  72,580
<ALLOWANCES>                                     7,015                   3,500
<INVENTORY>                                     37,532                  26,931
<CURRENT-ASSETS>                               653,870                 334,515
<PP&E>                                         190,922                 134,465
<DEPRECIATION>                                  72,885                  52,616
<TOTAL-ASSETS>                               1,834,973                 543,069
<CURRENT-LIABILITIES>                           38,009                  39,052
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                         1,795                   1,709
<OTHER-SE>                                   1,069,411                 500,672
<TOTAL-LIABILITY-AND-EQUITY>                 1,834,973                 543,069
<SALES>                                        303,679                 200,982
<TOTAL-REVENUES>                               303,679                 200,982
<CGS>                                          105,697                  75,908
<TOTAL-COSTS>                                  273,016                 147,658
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               9,840                     102
<INCOME-PRETAX>                                 44,413                  61,610
<INCOME-TAX>                                    28,113                  19,830
<INCOME-CONTINUING>                             16,300                  41,780
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    16,300                  41,780
<EPS-BASIC>                                       0.09                    0.26
<EPS-DILUTED>                                     0.09                    0.24