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Abkürzung-Kategorie: h
| Abkürzung | Langform |
| HDR | HDSL Dual Regenerator |
| HDR | Header |
| HDS | High Definition System |
| HDSC | High Density Signal Carrier |
| HDSL | High Bit/Data Rate/Speed Digital Subscriber Line/Link/Loop |
| HDTV | High Definition Television |
| HDX | Half Duplex |
| hdx | Hilfe Index Datei für Delphi |
| HE | Höheneinheit (in Racks) |
| HE | Head End |
| HEA | Health/Higher Education Authority |
| HEAAC | High Efficiency Advanced Audio Coder/Coding |
| HEAT | Helpdesk Expert Automation Tool |
| HEC | Header Error Control/Check |
| HECTOR | Heterogeneous Computer Together |
| HEGO | Heated Exhaust Gas Oxygen sensor |
| HEHO | Head End Hop Off |
| HEI | High Energy Ignition |
| HeimG | Heimgesetz |
| Heizöl EL | Extra-leichtes Heizöl |
| Heizöl S | Schweres Heizöl |
| HEL | Heizöl EL |
| HEL | Hardware Emulation Layer |
| HelCom | Helsinki Commission (Schutz der Ostsee) |
| HEM | Home, Entertainment, Multimedia |
| HEMI | HEMIspere |
| HEMP | High-level Entity Management Protocol (Internet) |
| HEMS | High-level Entity Management System (Internet) |
| HEMT | High Electron Mobility Transistor |
| HEN | Home Entertainment Network |
| HENSA | Higher Education National Software Archive |
| HEO | Highly Elliptical Orbit |
| HEP | Heterogenous Element/multi Processor |
| HEPNET | High Energy Physics Network |
| HERF | High Energy Radio Frequency |
| HERT | HERT/Hackers Emergency Response Team |
| HES | Home Electronic System (Siemens) |
| HESSLA | Hacktivismo Enhanced Source Software License Agreement |
| HEV | Hybrid Electric Vehicle |
| hex | Hexdump |
| HEX | hexadezimal |
| HF | High Frequency/Functionality |
| HF | HochFrequenz |
| HFC | Hybrid Fiber Coax (Network) |
| HFC | Hydraulic Fading Compensation |
| HFD | Hot Fix Device |
| HFD | Hauptanschluss für Direktwahl/Direktruf |
| HFEP | Host Front End Protocol |
| HFM | Heilsfilm-LuftMassenmesser |
| HFM | HeißFilm luftMasen Sensor |