<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          61,584
<SECURITIES>                                         0
<RECEIVABLES>                                  127,259
<ALLOWANCES>                                     2,022
<INVENTORY>                                          0
<CURRENT-ASSETS>                               224,437
<PP&E>                                         131,345
<DEPRECIATION>                                  90,132
<TOTAL-ASSETS>                                 300,821
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           406
<OTHER-SE>                                     101,817
<TOTAL-LIABILITY-AND-EQUITY>                   300,821
<SALES>                                        214,087
<TOTAL-REVENUES>                               214,087
<CGS>                                          170,190
<TOTAL-COSTS>                                  201,716
<OTHER-EXPENSES>                               (2,653)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  81
<INCOME-PRETAX>                                 15,729
<INCOME-TAX>                                     6,685
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     9,044
<EPS-PRIMARY>                                      .24
<EPS-DILUTED>                                      .20