High-level Data Link Control
<networking> (HDLC) A general-purpose data link control protocol defined
by ISO for use on both point-to-point and multipoint (multidrop) data links. It
supports full-duplex, transparent-mode operation. It is used extensively in both
multipoint and computer networks.
Some manufacturers and other standards bodies still use their own acronyms, e.g.
IBM's SDLC (Synchronous Data Link Control), the forerunner of HDLC and ANSI's
ADCCP (Advanced Data Communications Control Procedure).
[Fred Halsall, "Data Communications, Computer Networks and Open Systems" 4th
edition, 1996, p.237, Addison-Wesley Publishing Co. Reading, Mass., USA].
(1997-11-09)
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high-level language
(HLL) A programming language which provides some level of abstraction above
assembly language. These normally use statements consisting of English-like
keywords such as "FOR", "PRINT" or "GOTO", where each statement corresponds to
several machine language instructions. It is much easier to program in a
high-level language than in assembly language though the efficiency of execution
depends on how good the compiler or interpreter is at optimising the program.
Rarely, the variants "VHLL" and "MLL" are found.
See also languages of choice, generation.
(1994-12-07)
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higher-order function « higher-order macro «
High-level Data Link Control « high-level
language » high memory area » high moby » High
Performance Computing and Communications
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