<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1996             MAR-31-1996
<PERIOD-END>                               MAR-31-1996             MAR-31-1996
<CASH>                                      12,706,957              12,706,957
<SECURITIES>                                         0                       0
<RECEIVABLES>                                6,092,881               6,092,881
<ALLOWANCES>                                   152,633                 152,633
<INVENTORY>                                  1,816,233               1,816,233
<CURRENT-ASSETS>                            21,892,727              21,892,727
<PP&E>                                      23,249,336              23,249,336
<DEPRECIATION>                              14,732,284              14,732,284
<TOTAL-ASSETS>                              30,421,592              30,421,592
<CURRENT-LIABILITIES>                        4,638,526               4,638,526
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        43,464                  43,464
<OTHER-SE>                                  25,241,095              25,241,095
<TOTAL-LIABILITY-AND-EQUITY>                30,421,592              30,421,592
<SALES>                                      8,985,000              33,289,982
<TOTAL-REVENUES>                             8,985,000              33,289,982
<CGS>                                        5,338,000              20,688,947
<TOTAL-COSTS>                                5,338,000              20,688,947
<OTHER-EXPENSES>                                55,000                  20,426
<LOSS-PROVISION>                                     0                  95,000
<INTEREST-EXPENSE>                              28,000                 113,126
<INCOME-PRETAX>                              2,137,000               7,354,952
<INCOME-TAX>                                   805,000               2,219,088
<INCOME-CONTINUING>                          1,332,000               4,964,264
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                 1,332,000               4,964,264
<EPS-PRIMARY>                                     0.28                    1.20
<EPS-DILUTED>                                     0.28                    1.20