NASA Abbreviations and Acronyms

1. CO
   Changeout
2. CO
   Crossover
3. CO
   Cutoff
4. CO
   Contracting Officer
5. CO
   Cargo Operations (ksc Directorate)
6. CO 2
   Carbon Dioxide
7. CO-PI
   Co Principal Investigator
8. CO2
   Carbon Dioxide
9. COA
   Center Operations Area
10. COAS
    Course Optical Alignment Sight
11. COAS
    Crew Optical Alignment Sight
12. COAS
    Crewman Optical Alignment Sight
13. COAS
    Crew(man) Optical Alignment Sight
14. COB
    Communications Office Building
15. COB
    Center of Buoyancy
16. COB
    Close of Business
17. COBE
    Cosmic Background Explorer Satellite (NASA)
18. COBE
    Cosmic Microwave Background Explorer
19. COBOL
    Common Business-Oriented Language
20. COC
    Close-Open-Close

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