<ARTICLE>                     5

       
                                      
<PERIOD-TYPE>                            YEAR
<FISCAL-YEAR-END>                        DEC-31-1998
<PERIOD-END>                             DEC-31-1998
<CASH>                                         9,431
<SECURITIES>                                  37,602
<RECEIVABLES>                                 68,397
<ALLOWANCES>                                       0
<INVENTORY>                                    4,978
<CURRENT-ASSETS>                             126,159
<PP&E>                                        27,751
<DEPRECIATION>                                18,309
<TOTAL-ASSETS>                               142,595
<CURRENT-LIABILITIES>                         15,800
<BONDS>                                            0
<PREFERRED-MANDATORY>                              0
<PREFERRED>                                        0
<COMMON>                                         519
<OTHER-SE>                                   122,458
<TOTAL-LIABILITY-AND-EQUITY>                 142,595
<SALES>                                       68,246
<TOTAL-REVENUES>                              76,855
<CGS>                                         10,744
<TOTAL-COSTS>                                 51,939
<OTHER-EXPENSES>                                   0
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                               167
<INCOME-PRETAX>                               24,749
<INCOME-TAX>                                   7,010
<INCOME-CONTINUING>                           17,739
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                  17,739
<EPS-PRIMARY>                                   0.37
<EPS-DILUTED>                                   0.36