Acronyms in networking starting with 'H'

H0 High-capacity ISDN channel operating at 384 Kbps
H11 High-capacity ISDN channel operating at 1.536 Mbps
HDLC High-level Data Link Control
HDML Handheld Device Markup Language
HDSL High-bit-rate Digital Subscriber Line
HDTV High Definition Television
HEC Header Error Check
HF High Frequency (3 MHz to 30 MHz)
HFC Hybrid Fiber/Coax
HIC Head-end Interface Converter
HIPPI High Performance Parallel Interface
HLR Home Location Register
HNF High-performance Networking Forum
HPNA Home Phoneline Networking Alliance
HIPPI High Performance Parallel Interface
HomePNA Home Phoneline Networking Alliance
HPR High Performance Routing (IBM Corp.)
HSCSD High Speed Circuit Switched Data
HSM Hierarchical Storage Management
HST Helical Scan Tape
HSTR High Speed Token Ring
HSTRA High Speed Token Ring Alliance
HTML HyperText Markup Language
HTTP HyperText Transfer Protocol
HVAC Heating, Ventilation, and Air Conditioning
Hz Hertz (cycles per second)