H's

HAM - Home Amature Mechanic
HAN - Home Area Network
HBA - Host Bus Adapter
HCL - Hardware Compatability List
HCSS- High-Capacity Storage System
HD- Hard Drive
HD- High-Density
HDA - Head Disk Assembly
HDLC- High-Level Data Link Control
HDR - Host Data Replicator
HDSL- High-bit-rate Digital Subscriber Line
HDT - Host Digital Terminal
HDTV- High-Definition Television
HEC - Header Error Control
HEPNET- High Energy Physics Network
HFC - Hybrid Fiber-Coaxial
HGC - Hercules Graphics Card
HIC - Headend Interface Converter
HLF - High-Level Formatting
HLLAPI- High-Level-Language Application Program Interface
HMA - High Memory Area
HMMP- HyperMedia Management Protocol
HMMS- HyperMedia Management Schema
HMP - Host Monitoring Protocol
HP- Hewlett-Packard
HPC - Handheld Personal Computer
HPFS- High Performance File System
HPT - High-Pressure Tin
HR- Horizontal Rule
HRD - High Resolution Diagnostic Diskette
HRSC- High Resolution Stereo Camera
HSSI- High Speed Serial Interface
HST - High-Speed Technology
HTML- Hypertext Markup Language
HTTP- Hypertext Transfer Protocol
HW- HRSC / WAOSS
Hz- Hertz