<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM DELTEK
SYSTEMS, INC. FINANCIAL STATEMENTS INCLUDED IN THE COMPANY'S STATEMENT ON FORM
10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS
AND NOTES THERETO.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               JUN-30-1997             JUN-30-1997
<CASH>                                          12,335                       0
<SECURITIES>                                     8,689                       0
<RECEIVABLES>                                    6,516                       0
<ALLOWANCES>                                     (475)                       0
<INVENTORY>                                        199                       0
<CURRENT-ASSETS>                                29,604<F1>                   0
<PP&E>                                           4,509                       0
<DEPRECIATION>                                 (2,482)                       0
<TOTAL-ASSETS>                                  34,317<F2>                   0
<CURRENT-LIABILITIES>                           15,483                       0
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            17                       0
<OTHER-SE>                                      18,817                       0
<TOTAL-LIABILITY-AND-EQUITY>                    34,317                       0
<SALES>                                         11,454                  21,992
<TOTAL-REVENUES>                                11,454                  21,992
<CGS>                                                0                       0
<TOTAL-COSTS>                                    7,917                  14,900
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                                  3,774<F3>               7,388<F5>
<INCOME-TAX>                                     1,410<F4>               1,956<F6>
<INCOME-CONTINUING>                              3,537                   7,092
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     2,364<F4>               5,432<F6>
<EPS-PRIMARY>                                     0.14<F4>                   0<F6>
<EPS-DILUTED>                                        0                       0
<FN>
<F1>INCLUDES PREPAID EXPENSES AND OTHER CURRENT ASSETS OF 2,340.
<F2>INCLUDES COMPUTER SOFTWARE COSTS-NET OF 2,581. ALSO EXCLUDES OTHER ASSETS OF
105.
<F3>INCLUDES INTEREST INCOME OF 237.
<F4>AS A SUBCHAPTER "S" CORPORATION, THE PROFORMA INCOME TAX PROVISION, PROFORMA
NET INCOME, AND PROFORMA NET INCOME PER SHARE WAS 1,410, 2,364, AND $0.14 PER
SHARE.
<F5>INCLUDES INTEREST INCOME 0F 296.
<F6>AS A SUBCHAPTER "S" CORPORATION, THE PROFORMA INCOME TAX PROVISION, PROFORMA
NET INCOME, AND PROFORMA NET INCOME PER SHARE WAS 2,838, 4,550, AND $0.27 PER
SHARE.
</FN>