0001036050-98-001928 10-Q 2 19980930 19981113 SEI CORP 0000350894 6211 231707341 PA 1231 10-Q 34 000-10200 98746710 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 6106761000 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 10-Q 1 000103605098001928-001-seq1-10-q.txt FORM 10-Q FOR THE PERIOD ENDED SEPTEMBER 30, 1998 EX-27 2 000103605098001928-002-seq2-ex-27.txt FINANCIAL DATA SCHEDULE