<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                         190,983
<SECURITIES>                                   591,475
<RECEIVABLES>                                  139,624
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               841,636
<PP&E>                                          76,573
<DEPRECIATION>                                (39,332)
<TOTAL-ASSETS>                               1,063,436
<CURRENT-LIABILITIES>                          229,476
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           716
<OTHER-SE>                                     273,545
<TOTAL-LIABILITY-AND-EQUITY>                 1,063,436
<SALES>                                        188,415
<TOTAL-REVENUES>                               188,415
<CGS>                                           34,163
<TOTAL-COSTS>                                  128,208
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 64,972
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                             64,972
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    41,582
<EPS-PRIMARY>                                     0.39<F1>
<EPS-DILUTED>                                     0.37
<FN>
<F1>For Purposes of this Exhibit, Primary means Basic.
</FN>