| Abbreviation | Definition |
|---|---|
| HTFN | Hi Tech Forwarders Network |
| HTFN | Hybrid Transfer Function Network |
| HTL | Hops To Live |
| HTMD | How To Manage Devices |
| HTN | Hierarchical Task Networks |
| HTP | High ThroughPut |
| HTPS | High Throughput Pre-Screening |
| HTS | High Throughput Screening |
| HTTP | HyperText Transfer Protocol |
| HUB | Helping U Better |
| HUP | Hub Upgrade Procedure |
| HVT | High-Voltage Tower |
| I | Input |
| I2 | Internet 2 |
| IA | Intelligent Agent |
| IA | Interconnection Agreement |
| IA | Internet Audio |
| IAEC | International Address Element Code |
| IAGAN | Intergalactic Attack Generation Ad Network |
| IAL | Internet Agility Link |