<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                         125,137
<SECURITIES>                                   453,395
<RECEIVABLES>                                   42,147
<ALLOWANCES>                                     1,663
<INVENTORY>                                      6,982
<CURRENT-ASSETS>                               646,547
<PP&E>                                         161,825
<DEPRECIATION>                                  76,546
<TOTAL-ASSETS>                                 980,503
<CURRENT-LIABILITIES>                           36,264
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           226
<OTHER-SE>                                     817,020
<TOTAL-LIABILITY-AND-EQUITY>                   980,503
<SALES>                                        193,051
<TOTAL-REVENUES>                               193,051
<CGS>                                           74,760
<TOTAL-COSTS>                                   74,760
<OTHER-EXPENSES>                                 8,029
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  2,908
<INCOME-TAX>                                     1,732
<INCOME-CONTINUING>                              1,176
<DISCONTINUED>                                (21,449)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (20,273)
<EPS-BASIC>                                     (0.90)
<EPS-DILUTED>                                   (0.90)