<ARTICLE> 5
<RESTATED> 
       
                                                                                            
<PERIOD-TYPE>                   3-MOS                   3-MOS                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-END>                               DEC-31-1996             SEP-30-1996             JUN-30-1996             MAR-31-1996
<CASH>                                          25,211                   7,601                   9,490                   6,903
<SECURITIES>                                    54,388                  53,831                  53,441                       0
<RECEIVABLES>                                  166,140                 160,219                 143,516                 139,732
<ALLOWANCES>                                     2,335                   1,853                   1,886                   1,700
<INVENTORY>                                     17,491                  21,951                  19,481                  18,120
<CURRENT-ASSETS>                               263,149                 243,851                 225,953                 164,782
<PP&E>                                          36,395                  34,210                  31,648                  18,553
<DEPRECIATION>                                  14,948                  13,393                  12,018                       0
<TOTAL-ASSETS>                                 300,425                 278,562                 259,706                 186,861
<CURRENT-LIABILITIES>                          134,890                 115,234                 103,792                 102,604
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                           165                     165                     164                     150
<OTHER-SE>                                     163,925                 161,704                 154,636                  83,023
<TOTAL-LIABILITY-AND-EQUITY>                   300,425                 278,562                 259,706                 186,861
<SALES>                                        773,615                 547,437                 353,113                 168,389
<TOTAL-REVENUES>                               773,615                 547,437                 353,113                 168,389
<CGS>                                          684,882                 484,098                 311,782                 148,985
<TOTAL-COSTS>                                  684,882                 484,098                 311,782                 148,985
<OTHER-EXPENSES>                                49,103                  34,310                  22,642                  10,387
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                                  59                      38                      26                      13
<INCOME-PRETAX>                                 43,080                  31,247                  19,803                   9,239
<INCOME-TAX>                                    16,932                  12,250                   7,820                   3,659
<INCOME-CONTINUING>                             26,148                  18,997                  11,983                   5,580
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                    26,148                  18,997                  11,983                   5,580
<EPS-PRIMARY>                                      .44                     .42                     .40                     .37
<EPS-DILUTED>                                      .43                     .42                     .39                     .36