| Meaning | Category |
| Hafr Albatin, Saudi Arabia | Regional->Airport Codes |
| Hanbury Brown-Twiss | Academic & Science->Physics |
| Heflex Bioengineering Test | Governmental->NASA |
| Herringbone Twill | Governmental->Military |
| Heterojunction Bipolar Transistor | Academic & Science->Electronics |
| Heterojunction Bipolar Transistors | Governmental->Military |
| Holy Bible Trivia | Community->Religion |
| Houston Belt and Terminal Railway | Regional->Railroads |
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