<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                                       
<PERIOD-TYPE>                   6-MOS                   9-MOS                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                          19,418                   6,645                  33,935
<SECURITIES>                                    20,326                  17,939                   4,263
<RECEIVABLES>                                   61,761                  54,839                  59,231
<ALLOWANCES>                                     3,301                   2,892                   3,942
<INVENTORY>                                     26,785                  27,147                  22,715
<CURRENT-ASSETS>                               133,892                 111,911                 122,188
<PP&E>                                          26,098                  15,465                  28,245
<DEPRECIATION>                                  10,685                  11,996                  13,692
<TOTAL-ASSETS>                                 133,892                111,9111                 138,250
<CURRENT-LIABILITIES>                           41,671                  25,664                  29,079
<BONDS>                                              0                     352                     738
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                        49,535                  47,421                  47,912
<OTHER-SE>                                      59,217                  55,045                  60,048
<TOTAL-LIABILITY-AND-EQUITY>                   151,030                 129,087                 138,250
<SALES>                                        126,267                 185,347                 258,475
<TOTAL-REVENUES>                               126,267                 185,347                 258,475
<CGS>                                           89,531                 132,649                 185,313
<TOTAL-COSTS>                                   89,531                 132,649                 185,313
<OTHER-EXPENSES>                                29,282                  42,046                  56,232
<LOSS-PROVISION>                               255,734                     300                   1,040
<INTEREST-EXPENSE>                                   0                      11                      45
<INCOME-PRETAX>                                  8,507                  12,040                  18,422
<INCOME-TAX>                                     3,020                   4,168                   5,622
<INCOME-CONTINUING>                              5,843                   8,221                  13,132
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     5,843                   8,221                  13,132
<EPS-PRIMARY>                                     0.27                    0.38                    0.60
<EPS-DILUTED>                                     0.25                    0.36                    0.58