| Term | Description |
|---|
| H/V | Horizontal/Vertical
|
| H/W | Hardware
|
| HACMP | High Availability Cluster Multi-Processing [IBM]
|
| HAL | Hard Array Logic + Hardware Abstraction Layer +
House-Programmed Array Logic
|
| Handshake | See flowcontrol. |
| HAP | Host Access Protocol
|
| Hard disk | A diskdrive which contains one or more disks(which are hard platters rather than floppydisks) permanently sealed in it. Hard disks are noted for their speed andhigh capacity. |
| Hardware | Computer machinery, such asthe CPU,diskdrives, monitor,and printer. Contrast with software. |
| Hardware Handshaking | Hardware (usually a modemcable) which handles handshaking (data flowcontrol) automatically. Most new modem cables have hardware handshaking. |
| 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
|
| HDCP | High-Bandwidth Digital Content Protection
|
| 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
|
| Header | Text that appears at the top ofevery page of a document when it is printed. Compare with footer. |
| 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
|
| Hidden File | A file that is notintended to be viewed in a directorylisting. In MS-DOS,the system files IO.SYS and MSDOS.SYS are hidden; in Windows,the swap file. Some operatingsystems allow the user to hide files so that they can only be accessed ifthe name is known. |
| HIDS | Host-Based Intrusion Detection System
|
| Hierarchical Menu | Also called a Submenu or Cascading menu.A secondary menuthat appears while dragging and holding the cursor over an item in a menu. Itgives you choices of options that apply to the item you are selecting in themenu. |
| HIF | Hyper-G Interchange Format
|
| HIFD | High-Density Floppy Disk
|
| High Memory Area (HMA) | Thefirst 64K of extendedmemory in an IBM PCor compatible computer. This area is used by Windowsand by some applications. MS-DOScan also be "loaded high"- loaded into the HMA to make more room in conventionalmemory. |
| Highlighted | Indicates that an object or text is selectedand will be affected by your next action. Highlighted text appears in reversevideo on monochrome monitors and in a chosen color on color monitors.Highlighted objects may change color or be surrounded by some sort of selectioncursor. |
| 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
|
| 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
|
| Hot Key | A keystroke or combination of keystrokes intendedfor activating a RAM-residentprogram on IBM PCand compatible computers. |
| HOTT | Hot Off The Tree (electronic newsletter)
|
| HOV | High Occupancy Vehicle
|
| HP | Hewlett-Packard (Company)
|
| HP-UX | HP-UX is the version of UNIX designed by Hewlett-Packard to work with their PA-RISC and 68xx based machines. |
| 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
|
| HPTC | High Performance Technical Computing
|
| HPUX | Hewlett-Packard Unix
|
| HPW | High Performance Workstation [Sun]
|
| HRG | High Resolution Graphics
|
| HRIS | Human Resource Information System
|
| 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]
|
| 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
|
| Hue | Position of a color along the colorspectrum. For example, purple is between red and blue. Luminanceand saturationalso affect the appearance of a color. |
| Hurd | The Hurd is the official GNU OS. It is still in development and is not yet supported on too many different processors, but promises to be the most powerful OS available. It (like all the GNU software) is free. |
| HUT | Hopkins Ultraviolet Telescope
|
| HVP | Horizontal & Vertical Position
|
| HWCP | Hardware Code Page
|
| HWD | Height-Width-Depth
|
| HWDM | Hyperfine Wave Division Multiplexing
|
| HyperCard | Application toolkit for Macintoshcomputers, which provide an easy method of creating hypertext presentations.Currently, a HyperCard player comes free with Macintosh computers.I |
| hypertext | A hypertext document is like a text document with the ability to contain pointers to other regions of (possibly other) hypertext documents. |
| HYTELNET | Hypertext-browser for Telnet Accessible Sites
|
| Hz | Hertz
|
