NASA Abbreviations and Acronyms

1. OSS
   Optics Subsystem
2. OSS
   Oex Support System
3. OSS
   Office of Space Science
4. OSS
   Optics Subsystems
5. OSS
   Office of Space Sciences
6. OSSA
   Office of Space Science and Applications
7. OSSE
   Oriented Scintillation Spectrometer Experiment
8. OSSRH
   Orbiter Subsystem(s) Requirements Handbook
9. OST
   Operations Support Team (gsfc)
10. OST
    Observational Sequence Table
11. OSTA
    Office of Space and Terrestrial Application(s)
12. OSTDS
    Office of Space Tracking and Data Systems
13. OSTS
    Office of Space Transportation Systems
14. OSU
    Optical Stimulation Unit
15. OT
    Overall Test
16. OT
    Operating Time
17. OT
    Operational Trajectory
18. OT
    Optical Tracker
19. OT
    Overti Me
20. OT
    Oxidizer Tank

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