HDF - High Density Factor

HDL - Hardware Design Language

HDLC - High-level Data Link Control

HDM - Historical Data Model

HDMMCD - High - Density Multimedia Compact - Disc

HDR - Header

HDSL - High bit rate Digital Subscriber Line

HDTV - High Definition TV

HDx - Half Duplex

HEC - Header Error Code

HEC - Hyperelipsoidal Clustering

HECA - Hardware Error Confinement Area

HEM - Hyper Exponential Model

HEMT - High Electron Mobility Transistor

HEPC - Home Entrainment Personal Computer

HERTIS - Herfordshire Technical Information Service

HEX - Hexadecimal

HF - Hashing Function

HF - High Frequency

HFS - Hierarchical File System

HGA - Hercules Graphics Adapter

HGC - Hercules Graphics Card

HIBC - Health Industry Bar Code

HIBCC - Health Industry Business Communications Council

HIC - Hybrid Image Compression