1 | SYSX | United States Systems, Inc. | added 10/1990; 1/1994; eliminated 4/2000 | | NAKINA |
2 | SYSX | Winter Bird Corp. | added 4/2000; 7/2000-7/2005 | | NAKINA |
3 | SYSX | United States Systems, Inc. | added 10/90; 1/94; eliminated 4/2000 | | NRHS |
4 | SYSX | Winter Bird Corp. | added 4/2000; 7/2000 | | NRHS |
5 | SYSX | WINTER BIRD CORP. [UNITED STATES SYSTEMS, INC.] | | | PWRC |
6 | SYSX | Winter Bird Corporation | | | RSRV |