NASA Abbreviations and Acronyms

1. H
   2hydrogen
2. H
   20water
3. H
   Mhinge Mount
4. H
   /'eheat Exchanger
5. H
   1sthistory
6. H
   Epahigh Efficiency Particle Accumulator
7. H
   Epahigh Efficiency Particle Air (filter)
8. H
   Ltlhigh Level Test Language
9. ICR
   Instruction Change Request
10. ICU
    Instrumentation Control Unit
11. ICW
    interrupted continuous wave
12. INT
    Interrupt
13. INT
    Intensity
14. INT
    Integrated Test
15. ISR
    Initial System Release
16. ISS
    International Space Station
17. ISS
    Inertial Subsystem
18. ISS
    Inhibit/override Summary Snapshot Display
19. ISS
    Installation Support Services
20. ISS
    Instruction Summary Sheet

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