Toshiba Portege R500 User Manual page 191

N
non-system disk: A formatted floppy diskette you can use to store
nonvolatile memory: Memory, usually read-only (ROM), that is capable
numeric keypad overlay: A feature that allows you to use certain keys on
O
OCR: Optical Character Recognition (reader). A technique or device that
online state: A functional state of a peripheral device when it is ready to
operating system: A group of programs that controls the basic operation
output: The results of a computer operation. Output commonly indicates
P
parity: 1) The symmetrical relationship between two parameter values
password: A unique string of characters used to identify a specific user.
pel: The smallest area of the display that can be addressed by software.
peripheral component interconnect: An industry standard 32-bit bus.
peripheral device: An I/O device that is external to the central processor
pixel: A picture element. The smallest dot that can be made on a display
User's Manual
programs and data but you cannot use to start the computer. See
system disk.
of permanently storing information. Turning the computer's power
off does not alter data stored in nonvolatile memory.
the keyboard to perform numeric entry, or to control cursor and
page movement.
uses laser or visible light to identify characters and input them into a
storage device.
receive or transmit data.
of a computer. Operating system functions include interpreting
programs, creating data files, and controlling the transmission and
receipt (input/output) of data to and from memory and peripheral
devices.
data.
1) printed on paper, 2) displayed at a terminal, or 3) stored on some
magnetic media.
(integers) both of which are either on or off; odd or even; 0 or 1.
2) In serial communications, an error detection bit that is added to a
group of data bits making the sum of the bits even or odd. Parity can
be set to none, odd, or even.
The computer provides various levels of password protection such
as user, supervisor and eject.
Equal in size to a pixel or group of pixels. See pixel.
and/or main memory such as a printer or a mouse.
or printer. Also called a pel.
Glossary
Glossary-10