NASA Abbreviations and Acronyms

1. HW
   Hotwire
2. HW/SW
   Hardware/Software
3. HWCI
   Hardware Configuration Item
4. HWIL
   Hardware In Loop
5. HWL
   Honeywell
6. HWT
   Hypersonic Wind Tunnel
7. HWWS
   Hyperfiltration Wash Water Recovery System
8. HX
   Half Duplex
9. HX
   Heat Exchanger
10. HXIS
    Hard X-Ray Imaging Spectrometer
11. HYD
    Hydraulics
12. HYD
    Hydraulic Subsystem
13. HYDAC
    Hybrid Digital-Analog Computer
14. HYG
    Lhypergolic
15. HYPACE
    Hybrid Programmable Attitude Control Electronics
16. HYPAS
    Hybrid Predictive Aerobraking Scheme
17. HYT
    Height
18. HZ
    cycles per second (hertz)
19. HZ
    Hertz (cycles Per Second)
20. IAA
    International Aerospace Abstracts

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