Astronautics Abbreviations and Acronyms

1. OS
   on-orbit station
2. OSC
   Orbital Sciences Corporationration
3. OSCAR
   Orbiting Satellite Carrying Amateur Radio
4. OSCN
   Orbiter Specification Change Notice
5. OSCRS
   Orbital Spacecraft Consumables Resupply System
6. OSDH
   Orbiter System Definition Handbook
7. OSE
   Orbital Support Equipment
8. OSM
   Orbiter Service Module
9. OSO
   Orbiting Solar Observatory
10. OSOP
    Orbiter Systems Operating Procedure
11. OSS
    Orbiting Space Station
12. OSS
    Office of Space Sciences
13. OSSA
    Office of Space Sciences and Applications
14. OSSIU
    Orbiter-Space Station Interface Unit
15. OSSRH
    Orbiter Subsystem Requirements Handbook
16. OST
    Orbiter SuPport Trolley
17. OSTA
    Office of Space and Terrestrial Applications (US NASA; now OAST)
18. OSTDS
    Office of Space Tracking and Data Systems (NASA)
19. OSTO
    Office of Space Transportation Operations
20. OSTP
    Orbiting System Test Plan

Last updated: May 24, 2020 — Total entries: 1,443