<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JAN-31-1999
<PERIOD-START>                             FEB-01-1998
<PERIOD-END>                               JUL-31-1998 <F1>
<CASH>                                          43,402
<SECURITIES>                                   249,998
<RECEIVABLES>                                   91,043
<ALLOWANCES>                                     6,964
<INVENTORY>                                      6,358
<CURRENT-ASSETS>                               429,374
<PP&E>                                         147,693
<DEPRECIATION>                                 108,391
<TOTAL-ASSETS>                                 605,852
<CURRENT-LIABILITIES>                          213,974
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       337,284
<OTHER-SE>                                      52,095
<TOTAL-LIABILITY-AND-EQUITY>                   605,852
<SALES>                                        373,844
<TOTAL-REVENUES>                               373,844
<CGS>                                           38,398
<TOTAL-COSTS>                                  263,416
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                 1,163
<INTEREST-EXPENSE>                                 296
<INCOME-PRETAX>                                 79,513
<INCOME-TAX>                                    32,381
<INCOME-CONTINUING>                             47,132
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    47,132
<EPS-PRIMARY>                                     1.01
<EPS-DILUTED>                                     0.95
<FN> 
<F1>  Certain information for the 6 months ended July 31, 1998 has been restated
      to reflect the adjustment described at Note 1 to the Company's condensed 
      consolidated Financial Statements.
</FN>