NASA Abbreviations and Acronyms

1. S.A.
   Safe and Arm
2. S.A.
   Spacecraft Adapter
3. S.A.
   Safe and Arm (device)
4. S.A.
   Scheduled/actual
5. S.A.
   Site Activation
6. S.A.
   Subassembly
7. S.C.
   Signal Conditioner
8. S.C.
   Subcontractor
9. S.C.
   Spacecraft
10. S.C.
    Sensor/controller
11. S.C.
    Software Contractor
12. S.C.
    Splitter/combiner
13. S.C.
    Stabilization and Control
14. S.C.
    Stripchart (recorder)
15. CAPCOM
    Capsule Communicator
16. MAPS
    Magnetometer Pointing System
17. MCU
    Master Control Unit
18. MCU
    Mission Control Unit
19. MCU
    Message Control Unit
20. MCU
    Mechanisms Control Unit

Last updated: May 6, 2025 — Total entries: 14,020