Governmental & Military Abbreviations and Acronyms

1. OSR
   On Site Representative
2. OSR&AP
   Observers School of Reconnaissance & Aerial Gunnery
3. OSRA
   Ocean Shipping Reform Act
4. OSRD
   Office of Scientific Research and Development
5. OSRWG
   Oceanic Separation Reduction Working Group
6. OSS
   Operational Support Squadron
7. OSS
   Operations Support System
8. OSS
   Operational Support System
9. OSS
   Orbiting Space Station
10. OSS
    Office of Space Sciences
11. OSS
    Operations Support Squadron
12. OSS
    Or Office of Strategic Services
13. OSSA
    Office of Space Sciences and Applications
14. OSSA
    On- Site Service Agreement
15. OSSA
    OPERATIONS SPECIALIST SEAMAN APPRENTICE
16. OSSE
    Oriented Scintillation Spectrometer Experiment
17. OSSE
    Observing System Simulation Experiment
18. OSSI
    Operating Systems Support and Integration
19. OSSN
    OPERATIONS SPECIALIST SEAMAN
20. OSSR
    OPERATIONS SPECIALIST SEAMAN RECRUIT

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