0001036050-01-000535 10-K 7 20001231 20010329 SEI CORP 0000350894 6211 231707341 PA 1231 10-K 34 000-10200 1583963 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 6106761000 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100 10-K 1 0001.txt FORM 10-K EX-3.1.5 2 0002.txt AMENDMENT TO ARTICLES OF INCORPORATION EX-10.14.19 3 0003.txt TWENTIETH MODIFICATION AGRMNT TO THE CREDIT AGRMNT EX-21 4 0004.txt SUBSIDIARIES OF THE REGISTRANT EX-23 5 0005.txt CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS EX-99 6 0006.txt MISCELLANEOUS EXHIBIT EX-27 7 0007.txt FINANCIAL DATA SCHEDULE