<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE CONDENSED BALANCE SHEET AS OF MARCH 31, 1996 AND THE CONDENSED STATEMENT OF
OPERATIONS FOR THE THREE MONTHS ENDED MARCH 31, 1996 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             DEC-31-1995
<PERIOD-END>                               MAR-31-1996
<CASH>                                          24,388
<SECURITIES>                                    38,615
<RECEIVABLES>                                    8,005
<ALLOWANCES>                                       271
<INVENTORY>                                      8,632
<CURRENT-ASSETS>                                80,066
<PP&E>                                          48,462
<DEPRECIATION>                                  30,430
<TOTAL-ASSETS>                                  98,100
<CURRENT-LIABILITIES>                           17,370
<BONDS>                                          7,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       107,989
<OTHER-SE>                                    (34,259)
<TOTAL-LIABILITY-AND-EQUITY>                    98,100
<SALES>                                         13,116
<TOTAL-REVENUES>                                13,116
<CGS>                                            7,928
<TOTAL-COSTS>                                   12,813
<OTHER-EXPENSES>                                     4
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 191
<INCOME-PRETAX>                                    958
<INCOME-TAX>                                        48
<INCOME-CONTINUING>                                910
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       910
<EPS-PRIMARY>                                     0.11
<EPS-DILUTED>                                     0.11