H...

• .H Header (file name extension) [C]
• HACMP High Availability Cluster Multi-Processing [IBM]
• HAL Hard Array Logic + Hardware Abstraction Layer + House-Programmed Array Logic
• HAL * Heuristically Programmed Algorithmic (computer)
• [from 1968 movie "2001: A Space Odyssey"]
• HAP Host Access Protocol
• HARP-MRI Harmonic Phase MRI
• HASP Houston Automatic Spooling Priority (System)
• HBA Host Bus Adapter
• HCL Hardware Compatibility List
• HCSS High Capacity Storage System
• HCU Home Computer User
• HD Hard Disk + High Density
• HDA Head Disk Assembly
• HDC High Dependability Computing [Carnegie Mellon]
• HDCD High Definition Compatible Digital
• HDD Hard Disk Drive
• HDF Hierarchical Data Format [NCSA]
• HDI Head to Disk Interference
• HDL Hardware Description Language
• HDLC High-Level Data Link Control
• HDM Hardware Device Module
• HDML Handheld Device Markup Language
• HDR Header + High Data Rate
• HDSC High Density Signal Carrier [DEC]
• HDSL (See DSL)
• HDSS Holographic Data Storage System
• HDT Host Digital Terminal
• HDTV High Definition Television
• HDVD High Definition Volumetric Display
• HDW Hardware
• HDX Half Duplex
• HEOS High Earth Orbiting Satellite
• HERC Hercules
• HEX Hexadecimal
• HFC Hybrid Fiber-Coaxial
• HFS Hierarchical File System [Macintosh]
• HFT High Function Terminal [IBM]
• HGA Hercules Graphics Adapter
• HGCP Hercules Graphics Card Plus
• HH Hour
• HIDS Host-Based Intrusion Detection System
• HIF Hyper-G Interchange Format
• HIFD High-Density Floppy Disk
• HIL Human Interface Link [HP]
• HIMEM High Memory
• HIPPI High Performance Parallel Interface
• HLCO High Low Close Open
• HLL High Level Language
• HLLAPI High Level Language Application Programming Interface
• .HLP Help (file name extension)
• HLQ High Level Qualifier
• HLS Hue, Luminance, Saturation (color model)
• HLT Halt
• HMA High Memory Area [Microsoft] + Hub Management Architecture
• HMD Head Mounted Display
• HMI Human-Machine Interface
• HMM Hidden Markov Model
• HMMP Hyper-Media Management Protocol
• HMOS High Density Metal Oxide Semiconductor + High Speed Metal Oxide Semiconductor
• HMP Host Monitoring Protocol
• HOL High Order Logic
• HOLAP Hybrid OLAP
• HOTT Hot Off The Tree (electronic newsletter)
• HOV High Occupancy Vehicle
• HP Hewlett-Packard (Company)
• HPC Handheld Personal Computer
• HPCC High Performance Computing and Communications
• HPDJ Hewlett-Packard Desk Jet
• HPFS High-Performance File System
• HPG Hewlett-Packard Graphics
• HPGL Hewlett-Packard Graphics Language
• HPIB Hewlett-Packard Interface Bus
• HPLJ Hewlett-Packard Laser Jet
• HPOM Home Page Objects Model [Microsoft]
• HPPA Hewlett-Packard Precision Architecture
• HPPI High Performance Parallel Interface
• HPR High Performance Routing [IBM]
• HPSB High Performance Serial Bus
• HPUX Hewlett-Packard Unix
• HPW High Performance Workstation [Sun]
• .HQX BinHex (file name extension) [Macintosh]
• HRIS Human Resource Information System
• HRG High Resolution Graphics
• HRMS Human Resource Management System
• HRTF Head Related Transfer Function
• HS High Speed
• HSB Hue, Saturation, Brightness (color model)
• HSC Hierarchical Storage Controller + High Speed Channel
• HSI Hue, Saturation, Intensity
• HSM Hierarchical Storage Management
• HSP High Speed Printer/Processor
• HSSI High Speed Serial Interface
• HST High Speed Technology [U.S. Robotics]
• .HST History + Host (file name extensions)
• HSV Hue Saturation Value
• HTML HyperText Markup Language
• HTTP HyperText Transfer Protocol
• HTTP-NG HTTP Next Generation
• HTTPS HyperText Transfer Protocol Secure
• HUD Heads Up Display
• HUT Hopkins Ultraviolet Telescope
• H/V Horizontal/Vertical
• HVP Horizontal & Vertical Position
• H/W Hardware
• HWCP Hardware Code Page
• HWD Height-Width-Depth
• HWDM Hyperfine Wave Division Multiplexing
• .HYP Hyphenation (file name extension)
• HYTELNET Hypertext-browser for Telnet Accessible Sites
• Hz Hertz