NASA Abbreviations and Acronyms

1. FCL
   Freon Coolant Line
2. FCL
   Freon Coolant Loop
3. FCM
   Flow Control Module
4. FCMC
   Facility Control and Monitor Console
5. FCMU
   Foot-Controlled Maneuvering Unit
6. FCN
   Function
7. FCO
   Functional Checkout
8. FCO
   Final Checkout
9. FCOB
   Flight Crew Operations Branch
10. FCOD
    Flight Crew Operations Directorate
11. FCOS
    Flight Computer Operating System
12. FCOS
    Flight Control Operating System
13. FCP
    Firm Cost Proposal
14. FCP
    Failure Correction Panel
15. FCP
    Fuel Cell Power Plant
16. FCPS
    Fuel Cell Power System (Subsystem)
17. FCR
    Facility Change Request
18. FCR
    Future Communications Requests
19. FCR
    Final Configuration Review
20. FCRA
    Fecal Collection Receptacle Assembly

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