| Subject | English | Thesaurus |
| USA | Facility Administration Control System | FACS |
| telecom., abbr. | Facility Assignment and Control System | FACS |
| abbr. | Facility Monitoring and Control System | FMCS (Elenka_M) |
| abbr., scottish | Integrated Message Handling & Control System | IMUS |
| telecom., abbr. | Loop Facility Assignment and Control System | LFACS |
| abbr. | steady-state control system | terminal control system (ssn) |