<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH CONSOLIDATED FINANCIAL STATEMENTS AND NOTES.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                          47,966
<SECURITIES>                                   152,459
<RECEIVABLES>                                  246,402
<ALLOWANCES>                                   (14,797)
<INVENTORY>                                    177,448
<CURRENT-ASSETS>                               741,711
<PP&E>                                         978,948
<DEPRECIATION>                                (772,953)
<TOTAL-ASSETS>                               1,082,507
<CURRENT-LIABILITIES>                          343,542
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           429
<OTHER-SE>                                     702,972
<TOTAL-LIABILITY-AND-EQUITY>                 1,082,507
<SALES>                                        328,801
<TOTAL-REVENUES>                               328,801
<CGS>                                          226,219
<TOTAL-COSTS>                                   84,144
<OTHER-EXPENSES>                                (8,284)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 384
<INCOME-PRETAX>                                 26,337
<INCOME-TAX>                                     5,794
<INCOME-CONTINUING>                             20,543
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    20,543
<EPS-BASIC>                                       0.57
<EPS-DILUTED>                                     0.56