NASA Abbreviations and Acronyms

1. TB
   Thermal Balance
2. TB
   Talk Back
3. TB
   Terminal Base
4. TB
   Time Base
5. TB
   Toggle Buffer
6. TB
   Thermal Bake
7. TBA
   To Be Announced
8. TBA
   To Be Added
9. TBC
   Terminal Buffer Controller
10. TBD
    To Be Determined
11. TBD
    To Be Developed
12. TBF
    Test De Bon Fonctionnement (spacelab)
13. TBI
    Through-Bulkhead Initiator
14. TBP
    To Be Provided
15. TBR
    To Be Resolved
16. TBS
    To Be Supplied
17. TBS
    To Be Superseded
18. TBS
    Task Breakdown Structure
19. TBS
    To Be Specified
20. TC
    Test Conductor

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