NASA Abbreviations and Acronyms

1. NX
   Normal To X-Axis
2. NY
   Normal To Y-axis
3. NZ
   Normal Acceleration
4. NZB
   Non Zero Binary
5. OA
   On-Line Archive
6. OA
   Operational Instrumentation Mdm-Aft
7. OA
   Overall Level
8. OA
   Office of Applications (now Osta)
9. OA
   Operational Aft (dsc Or Mom)
10. OA
    Orbital Assembly
11. OA
    Output Axis
12. OA
    Operations Astronomer
13. OAC
    Quality Assurance Chart
14. OAF
    Optical Alignment Facility
15. OAFD
    Orbiter Air Flight Deck
16. OAL
    Overall Level
17. OAO
    Orbiting Astronomical Observatory
18. OASPL
    Overall Sound Pressure Level
19. OAST
    Office of Aeronautics and Space Technology
20. OAT
    Operational Acceptance Test

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