<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEET AND CONSOLIDATED STATEMENT OF INCOME AND IS QUALIFIED IN TIS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                                                                       
<PERIOD-TYPE>                   3-MOS                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-2001             MAR-31-2000             MAR-31-2000
<PERIOD-START>                             APR-01-2000             APR-01-1999             APR-01-1999
<PERIOD-END>                               JUN-30-2000             JUN-30-1999             MAR-31-2000
<CASH>                                           56722                       0                   48515
<SECURITIES>                                     17611                       0                   21807
<RECEIVABLES>                                    13323                       0                   11144
<ALLOWANCES>                                       719                       0                     754
<INVENTORY>                                       4362                       0                    3131
<CURRENT-ASSETS>                                 96627                       0                   90492
<PP&E>                                           13704                       0                   12603
<DEPRECIATION>                                    7653                       0                    6946
<TOTAL-ASSETS>                                  103277                       0                   96748
<CURRENT-LIABILITIES>                            17441                       0                   15626
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                            31                       0                      31
<OTHER-SE>                                       41834                       0                   41424
<TOTAL-LIABILITY-AND-EQUITY>                    103277                       0                   96748
<SALES>                                          17761                   12814                       0
<TOTAL-REVENUES>                                 25169                   19071                       0
<CGS>                                             6094                    4814                       0
<TOTAL-COSTS>                                     6689                    5227                       0
<OTHER-EXPENSES>                                 12893                    9218                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                  17                       1                       0
<INCOME-PRETAX>                                   5587                    4626                       0
<INCOME-TAX>                                      2317                    1764                       0
<INCOME-CONTINUING>                               4304                    3134                       0
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                      4304                    3134                       0
<EPS-BASIC>                                        .16                     .22                       0
<EPS-DILUTED>                                      .15                     .13                       0