Toshiba Satellite 2670 - Manual (Page 172)

Glossary 10 User's Manual
Satellite 2670/2710 User's Manual – 2670_UK.doc – ENGLISH – Printed on 19/01/00 as IM_267UK
N
non-system disk: A formatted diskette (floppy disk) you can use to store
programs and data but you cannot use to start the computer. See
system disk.
non-volatile memory: Memory, usually read-only (ROM), that is capable
of permanently storing information. Turning the computer’s power
off does not alter data stored in non-volatile memory.
numeric keypad overlay: A feature that allows you to use certain keys on
the keyboard to perform numeric entry, or to control cursor and
page movement.
O
OCR: Optical Character Recognition (reader). A technique or device that
uses laser or visible light to identify characters and input them into
a storage device.
on-line state: A functional state of a peripheral device when it is ready to
receive or transmit data.
operating system: A group of programs that controls the basic operation 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.
output: The results of a computer operation. Output commonly indicates data
1) printed on paper, 2) displayed at a terminal, 3) sent through the
serial port of internal modem, or 4) stored on some magnetic media.
P
parallel interface: Refers to a type of information exchange that transmits
information one byte (8 bits) at a time. See also serial interface.
parallel: Refers to two or more processes or events that can occur
simultaneously, and without interfering with each other. See also serial.
parity: 1) The symmetrical relationship between two parameter values
(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.
password: A unique string of characters used to identify a specific user.
The computer provides various levels of password protection such
as user, supervisor and eject.
pel: The smallest area of the display that can be addressed by software.
Equal in size to a pixel or group of pixels. See pixel.