NASA Abbreviations and Acronyms

1. Comp.
   Compass
2. Comp.
   Compensate
3. COS
   Cosmic Origins Spectrograph
4. COS
   Carry-on Oxygen System
5. COS
   Console Operating System
6. COTR
   Contracting Officer's Technical Representative
7. CSRS
   Civil Service Retirement System
8. d&o
   Description and Operations
9. D/L
   Downlink
10. D/L
    Deorbit/landing
11. D/L
    Downlist
12. E&P
    electron/proton
13. E.O.
    engineering and operations
14. E.O.
    engineering/operations
15. F&C
    Fuel Cells
16. F&C
    Fit Check
17. F&C
    Flight Controller
18. F&F
    Face-To-Face
19. F&F
    Fill/Full
20. ISP
    Internet Service Provider

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