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Pathname
The list of directories the MS-DOS operating system must search
through to locate a file. For example, the pathname for a file
named CONTRACT.TXT that is located in the BUSINESS
subdirectory is \BUSINESS\CONTRACT.TXT.
Peripheral device
An external device, such as a printer or mouse, connected to the
computer.
Port
An input/output connection on a computer to which you can
attach a peripheral device.
Power-on diagnostics
A set of testing routines the computer performs automatically
every time you turn it on.
RAM
Random Access Memory. The portion of the computer’s memory
that runs programs and temporarily stores data while you work.
All data stored in RAM is temporarily maintained while the
computer is in Suspend mode, but erased when you turn off the
computer. See also ROM.
Read/write head
The physical device inside a disk drive that reads and records data
on the magnetic surface of a disk.
Real-time clock
A battery-powered clock in the computer that keeps track of the
current time and date even when the computer’s power is off.
10
Glossary