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hexadecimal:
The base-16 numbering system used by programmers to represent binary
numbers. Digits above 9 are represented by letters (the 15 digits are 1, 2, 3, 4,
5, 6, 7, 8, 9, A, B, C, D, E, and F). Two hexadecimal digits are equivalent to the
eight bits in a byte. For example, F1 in hexadecimal is equivalent to 11110001
in binary. See also
binary, decimal
.
high-density diskette:
A diskette that holds 1.2 MB (5.25-inch) or 1.44 MB (3.5-inch) of
information.
hot-pluggable drives
: Drives that you can install or remove without using screws or
cables and without powering down the server.
hub:
A central connecting device in a network that joins communications lines together in a star
configuration.
A switching hub also routes messages and packets among the
computers connected to the network.
hypermedia:
A method of providing multiple connected pathways through a body of
information, allowing users to jump easily from a topic to related or
supplementary material, which may be text, graphics, audio, images, or video.
HyperText Markup Language (HTML):
A special coding scheme used to prepare text and
graphics for access over the World Wide Web.
I
icon:
A small picture that represents a function, file, or program.
Industry Standard Architecture (ISA):
An expansion bus design that provides a 16-bit
data path with 16-bit and 8-bit slots. A 16-bit expansion board can use two
adjacent 8-bit slots. See also
EISA
.
infrared port:
A port that allows data to be transferred by infrared signals instead of a
cable. It works on the same principle as a remote control for a television set.
input:
Information received by a computer from a storage device such as a disk, or an
input device such as the keyboard.
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