helical-scan cartridge
A type of magnetic tape that uses the same technology as VCR tapes. The term helical scan usually refers to 8mm tapes, although 4mm tapes (called DAT tapes) use the same technology. The 8mm helical-scan tapes have data capacities up to 40GB.
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- help desk
A department within a company that responds to user’s technical questions. Most large software companies have help desks to answer user questions. Questions and answers can be delivered by telephone, e-mail, BBS, or fax. There is even help desk software that makes it easier for the people running the help desk to quickly find answers […]
- heterogeneous network
A network that includes computers and other devices from different manufacturers. For example, local-area networks (LANs) that connect PCs with Apple Macintosh computers are heterogeneous.
- heuristic programming
A branch of artificial intelligence, which uses heuristics — common-sense rules drawn from experience — to solve problems. This is in contrast to algorithmic programming, which is based on mathematically provable procedures. Heuristic programming is characterized by programs that are self-learning; they get better with experience. Heuristic programs do not always reach the very best […]
- Hexadecimal
Refers to the base-16 number system, which consists of 16 unique symbols: the numbers 0 to 9 and the letters A to F. For example, the decimal number 15 is represented as F in the hexadecimal numbering system. The hexadecimal system is useful because it can represent every byte (8 bits) as two consecutive hexadecimal […]
- hibernate mode
A power management mode that conserves power by powering down the system. In hibernate mode the current state of the system is saved to the hard drive, and the system will power down. When a user turns the system power back on, the saved information is read from the hard disk, restoring the last used […]