| Abbreviation | Definition |
|---|---|
| HST | Help Support Technician |
| HT | Horizontal Tab |
| HTC | High Tech Computer |
| HTG | Human Trafficking General |
| HTN | Hierarchical Transition Network |
| HTOL | High Temp Operating Life |
| HUB | Home User and Business |
| HUGH | How U Get Help |
| HUM | Host User Management |
| HURD | Hird Of Unix Replacing Daemons |
| HVIT | Horizontal Vertical Indexing Table |
| HVL | Hierarchical Variable Length |
| HVO | Handheld Virtual Office |
| HWD | HardWare Device |
| HWG | Harmonization Working Group |
| HWU | HardWare Unit |
| IA | Information Architecture |
| IA5 | International Alphabet Five |
| IaaS | Infrastructure as a Service |
| IAC | Integrator And Computer |