NCR PC4I, Owner'S Manual

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GLOSSARY
CATHODE RAY TUBE (CRT)
An electronic vacuum tube with a screen, such as a television
picture tube, upon which information may be displayed.
CENTRAL PROCESSING UNIT (CPU)
The central processor or the computer system contains the
internal memory unit (memory), the arithmetic logic unit (ALU),
and the input/output control unit (I/O Control).
COBOL
An acronym for Common Business Oriented Language — a
higher level language developed for business data-processing
applications.
CODING
(1) The writing of a list of instructions which will cause a
computer to perform specified operations. (2) An ordered list or
lists of the successive instructions which will cause a computer to
perform a particular process.
COMMAND
An instruction which tells the operating system what you want to
do.
COMMUNICATION ADAPTER
A hardware component that is hardwired into the telephone line
which prepares data for transmission through a telephone line.
COMPILER
A computer program that operates on symbolic input data to
produce machine instructions. A compiler is more powerful than
an assembler. It is able to replace certain input items with a
series of instructions. The program which results from compiling
is a translated and expanded version of the original program.
COMPONENT
A functional part of an operating system, i.e., your keyboard.
COMPRESSION
The elimination of blank spaces on the magnetic tape or disk by
placing data files immediately adjacent to each other.
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OWNER S MANUAL