0000950131-99-006267 10-Q 5 19991001 19991112 GSI GROUP INC 0001050925 3523 370856587 DE 1231 10-Q 34 333-43089 99750321 1004 EAST ILLINOIS ST ASSUMPTION IL 62510 2172264421 1004 EAST ILLINOIS ST ASSUMPTION IL 62510 10-Q 1 000095013199006267-001-seq1-10-q.txt FORM 10-Q EX-10.1 2 000095013199006267-002-seq2-ex-10-1.txt LETTER AGREEMENT DATED OCTOBER 27, 1999 EX-10.2 3 000095013199006267-003-seq3-ex-10-2.txt ADDENDUM DATED SEPTEMBER 30, 1999 MASTER LEASE EX-10.3 4 000095013199006267-004-seq4-ex-10-3.txt MASTER LEASE AGREEMENT EX-27.1 5 000095013199006267-005-seq5-ex-27-1.txt FINANCIAL DATA SCHEDULE