0000950133-00-004485 10-Q 3 20000930 20001114 COSTAR GROUP INC 0001057352 7374 522091508 DE 1231 10-Q 34 000-24531 763080 2 BETHESDA METRO CENTER 10TH FLOOR BETHESDA MD 20814 3012158300 2 BETHESDA METRO CENTER BETHESDA MD 20814 10-Q 1 w42214e10-q.txt COSTAR GROUP FORM 10-Q EX-10.1 2 w42214ex10-1.txt EMPLOYMENT AGREEMENT FOR LAWRENCE J. DRESSEL EX-27 3 w42214ex27.txt FINANCIAL DATA SCHEDULE