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input/output (I/O):
Input and output are two of the three functions that computers perform
(the other is processing). Input/Output describes the interrelated tasks of
providing information to the computer and providing the results of processing
to users. I/O devices include keyboards (input) and printers (output). A disk
drive is both an input and an output device, since it can both provide
information to the computer and receive information from the computer.
instruction:
A statement in a computer program that performs a particular function or
task.
Integrated Services Digital Network (ISDN):
A worldwide communications network for
delivering telephone and data services. It uses two types of communications
channel: a B channel, which carries voice, graphics and data at 64 Kbps, and a
D channel, which carries control information for signalling at 16 Kbps. A basic
ISDN installation typically provides two B channels and one D channel.
Intelligent Input/Output (I
2
O):
A standard for offloading input and output to an auxiliary
processor. The auxiliary processor (I/O processor) manages the data transfer
while the CPU is busy doing something else.
interface:
A connection between two parts of a system that lets them work together.
There are different types of interface: (1) Elements such as the graphics
design, prompts, and menus of a program allow you to interact with the
program. These elements make up the user interface. (2) A physical
connection between one system or device and another so that information can
be exchanged.
interlacing:
A method of refreshing a computer screen, in which only every other line of
pixels is refreshed. Interlaced monitors take two passes to create a complete
screen image.
Internet:
The collection of computers located throughout the world that are connected
over telephone lines to provide electronic mail and other services.
intranet:
World Wide Web pages designed to serve a limited group of people, such as the
employees of a particular company. Users must enter a password to access
the information.
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