Governmental & Military Abbreviations and Acronyms

1. OSSS
   Operational Space Services and Support
2. OSSS
   Officer Selection Support System
3. OSSTMM
   Open Source Security Testing Methodology Manual
4. OST
   Outer Space Treaty
5. OST
   Orbiter SuPport Trolley
6. OST
   Office of the Secretary of Transportation
7. OST/S-60
   Office of Intelligence, Security and Emergency Response
8. OSTA
   Office of Space and Terrestrial Applications (US NASA; now OAST)
9. OSTC
   Open System Testing Consortium
10. OSTD
    Officer'S Steward
11. OSTDS
    Office of Space Tracking and Data Systems (NASA)
12. OSTI
    Office of Scientific and Technical Information (DOE)
13. OSTO
    Office of Space Transportation Operations
14. OSTP
    Office of Science and Technology Policy
15. OSTP
    Orbiting System Test Plan
16. OSTS
    Office of Space Transportation Systems
17. OSU
    Oregon State University
18. OSUD
    Office of The Under Secretary of Defense
19. OSUT
    One Station Unit Training
20. OSUT
    One-Station Unit Training. Combination of BCT and AIT

Last updated: May 24, 2020 — Total entries: 74,797