| Abbreviation | Definition |
|---|---|
| HDI | Help Desk Internal |
| HDLC | High Level Data Link Communications |
| HDMI | High Definition Multimedia Interface |
| HDML | Handheld Devices Markup Language |
| HDML | Hyperdocument Description Meta Language |
| HDR | Hard Disk Recording |
| HDSL | High-data-rate Digital Subscriber Line |
| HE | High End (system) |
| HEL | Haptic Effects Library |
| HEVC | High Efficiency Video Coding |
| HEX | Highly Evolvable XML |
| HF | Header File |
| HGC | Hercules Graphics Card |
| HGFP | Healthy General Fund Partnership |
| HGFT | Holographic General Function Theorem |
| HGPA | Hunter General Practitioners Association |
| HGS | Hillsdale General Store |
| HGVT | Hospital General del Valle de Tulancingo |
| HH | Henry Hebbard |
| HHC | Hand Held Computer |