
<TABLE> <S> <C>

                                                    
<PAGE>
<ARTICLE> 5
<LEGEND>

FINANCIAL DATA SCHEDULE

This schedule contains summary financial information extracted from Form 10-Q
financial statements filed for the period ending June 30, 1996 and is
qualified in its entirety by reference to such financial statements.

</LEGEND>
<MULTIPLIER>1000
       
<S>                               <C>
<PERIOD-TYPE>                           6-MOS
<FISCAL-YEAR-END>                 DEC-31-1996
<PERIOD-END>                      JUN-30-1996
<CASH>                                   5236
<SECURITIES>                            24509
<RECEIVABLES>                           33526
<ALLOWANCES>                                0
<INVENTORY>                              9177
<CURRENT-ASSETS>                        79199
<PP&E>                                  59132
<DEPRECIATION>                          43096
<TOTAL-ASSETS>                         168626
<CURRENT-LIABILITIES>                   22622
<BONDS>                                    68
<COMMON>                                  650
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<OTHER-SE>                             141616
<TOTAL-LIABILITY-AND-EQUITY>           168626
<SALES>                                     0
<TOTAL-REVENUES>                        75421
<CGS>                                       0
<TOTAL-COSTS>                           51832
<OTHER-EXPENSES>                        13264
<LOSS-PROVISION>                            0
<INTEREST-EXPENSE>                          0
<INCOME-PRETAX>                         11836
<INCOME-TAX>                             4735
<INCOME-CONTINUING>                      7107
<DISCONTINUED>                              0
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                             7107
<EPS-PRIMARY>                            1.07
<EPS-DILUTED>                            1.07
        


</TABLE>
