NASA Abbreviations and Acronyms

1. A&S
   Auxiliary Stage
2. A&S
   Alignment and Stabilization
3. A&S
   acquisition sensor
4. A&S
   arm/safe
5. A/O
   Analog Output
6. ACO
   Administrative Contracting Officer  
7. ACO
   assembly checkout
8. ACO
   acceptance checkout
9. ACWP
   actual cost for work performed
10. AFTP
    Air Force test procedure
11. ALV
    Advanced Logistics Vehicle
12. ALV
    Advanced Launch Vehicle
13. AMPS
    Atmospheric Magnetospheric Plasma System
14. ANSI
    American National Standards Institute, Inc.
15. APT
    Airport
16. APT
    automatic programmed tool
17. APT
    Airborne Pointer Tracker
18. APT
    Astronaut Preference Test
19. ARS
    Attitude Reference System
20. ARS
    American Rocket Society

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