| Abbreviation | Definition |
|---|---|
| HIDF | Horizontal Intermediate Distributing Frame |
| HIP | Holes In Phonebooks |
| HITN | Hispanic Information and Telecommunications Network |
| HKT | Hong Kong Telecommunications |
| HLB | Hierarchical Line Balancing |
| HLR | Home Location Register |
| HMEC | Hybrid Multi-Level Error Control |
| HN | Home Number |
| HNT | Home Net Telecom |
| HOPA | Higher-Order Path Adaptation |
| HP-GL | Hewlett-Packard Graphics Language |
| HPN | Home Phone Network |
| HPSA | High Speed Packet Access |
| HPSA+ | Evolved High Speed Packet Access |
| HQGSM | High-Quality Global System for Mobile communications |
| HS | Heterogeneous Services |
| HS2 | High Speed 2 |
| HSC | High Speed Connect |
| HSCSD | High-Speed Circuit-Switched Data |
| HSCSWD | High-Speed Circuit-SWitched Data |