H

HBT

Heterojunction Bipolar Transistor

HD

Hard Disk

HD

High Density

HDB

High Density Bipolar (code)

HDB3

High Density Bipolar 3-level (code)

HDD

Hard Disk Drive

HDF

Hierarchical Data Format

HDI

High Density Interface (connector)

HDL

Hardware Description Language

HDLC

High level Data Link Control (IBM, Layer 2) (ISO 4335)

HDSL

High rate Digital Subscriber Loop (Line?)

HDTV

High Definition TeleVision

HDX

Half DupleX

HF

High Frequency

HERF

High Energy Radio Frequency

HFC

Hybrid Fiber/Coaxial network

HI

Host Interface

Hiperlan

HIgh PErformance Radio LAN

HiPPI

HIgh Performance Parallel Interface

HLL

High Level Logic

HLN

High Level Network

HLS

Hue Lightness Saturation (color)

HMA

High Memory Area

HMD

Head Mounted Display

HMI

Human-Machine Interface

HP

Horse Power (746 W)

HP-IB

Hewlett Packard Instrument Bus (GPIB)

HP-PCL

Hewlett Packard Plotter Control Language

HPCC

High Performance Computing and Communications

HPGL

Hewlett Packard Graphic Language

HSB

Hue Saturation Brightness (color)

HSL

Hue Saturation Lightness (color)

HSSI

High Speed Serial Interface

HSTP

High Speed Transport Protocol

HSV

Hue Saturation Value (color)

HT

Horizontal Tab (TAB, char 09 - 09H)

HTL

High Threshold Logic

HTML

HyperText Mark-up Language (WWW)

HTTP

HyperText Transfer Protocol (WWW)

HUD

Head Up Display

HV

High Voltage

HVAC

Heating, Ventilation and Air Conditioning

HVC

Hue Value Chroma (color)

HVDC

High Voltage Direct Current