| Abbreviation | Definition |
|---|---|
| HSELAN | High Speed European Local Area Network |
| HSI | Handling Speed Intelligently |
| HSI | High Speed Interconnect |
| HSI | High Speed Internet |
| HSLAN | High Speed Local Area Network |
| HSLN | High-Speed Local Network |
| HSN | Hopping Sequence Number |
| HSNA | Health Sciences Networking Association |
| HSNL | High Speed Networking Laboratory |
| HSPSD | High Speed Packet Switched Data |
| HSRP | Hot Standby Routing Protocol |
| HSS | High Speed Serial |
| HSS | High Speed Sync |
| HSSI | High Speed Serial Interface |
| HSUPA | High-Speed Upload Packet Access |
| HT | Hyper-Threading |
| HT | HyperTransport |
| HTB | Hierarchical Token Bucket |
| HTC | Host/Target Communication |
| HTDS | Host Terminal Database Server |