Operating system
A collection of programs (such as MS-DOS or MS OS/2) that
manages a computer’s operations. The operating system
determines how programs run on the computer and supervises
all input and output.
Option card
A circuit board you install inside the computer to provide
additional capabilities, such as more memory or a modem.
Parallel
The type of interface that transmits data in groups of bits. See
Interface and Serial.
Parameter
A qualifier added to a command that tells MS-DOS what
as what data you want to process and where to locate or store a
file.
The directory immediately above a given directory in the
directory tree. In pathnames, the parent directory is represented
by the symbol . . (two periods).
Parity
Data signals sent during communications to detect errors in
transmitting or receiving data.
Partition
The area defined on a hard disk for use by an operating system;
to divide a hard disk into separate sections or logical drives.
Glossary 15
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