syst - tact
- systems staff office
- systems staff officer
- systems support center
- systems support division
- systems test and evaluation plan
- systems test complex
- systems test complex data system
- systems test complex equipment
- systems test configuration
- systems test console
- systems test unit
- systems training program
- SYSTEP
- SYSTO
- SZ
- T
- T & AT
- T & CO
- T & D
- T & DA
