NASA Abbreviations and Acronyms

1. A&L
   Airlock
2. A&L
   Approach and Landing
3. A&L
   Air Lock
4. C&S
   Cycles Per Second
5. C&S
   Cost/Schedule
6. C/O
   Checkout
7. C/O
   Changeout
8. C/O
   Cutoff
9. C/O
   Contamination/Overpressure
10. CCO
    Customer Contracting Officer
11. CCO
    current-controlled oscillator
12. CCO
    Contract Change Order
13. CCT
    computer-compatible tape
14. CCT
    command/control transmitter
15. CCT
    Computer Compatible Tape
16. CCTV
    Closed Circuit Television
17. CST
    Constant
18. CST
    Combined Systems Test
19. CST
    Contract Supplemental Tooling
20. CST
    Crew Station Trainer

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