<ARTICLE> 5
<LEGEND>
NOTE: THE SHARES USED IN THE COMPUTATION OF BASIC AND DILUTED NET INCOME PER
SHARE REFLECT THE TWO-FOR-ONE STOCK SPLIT EFFECTED OCTOBER 19, 2000.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-START>                             APR-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                         381,486
<SECURITIES>                                    22,815
<RECEIVABLES>                                   12,140
<ALLOWANCES>                                         0
<INVENTORY>                                      9,490
<CURRENT-ASSETS>                               432,735
<PP&E>                                          27,591
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                 465,351
<CURRENT-LIABILITIES>                           18,999
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       358,988
<OTHER-SE>                                      86,842
<TOTAL-LIABILITY-AND-EQUITY>                   465,351
<SALES>                                         58,841
<TOTAL-REVENUES>                                58,841
<CGS>                                           24,392
<TOTAL-COSTS>                                   48,680
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 22,874
<INCOME-TAX>                                     8,464
<INCOME-CONTINUING>                             14,410
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,410
<EPS-BASIC>                                       0.38
<EPS-DILUTED>                                     0.34