Toshiba Satellite Pro U400 User Manual download pdf (Page 169)

User’s Manual Glossary-10

Glossary

motherboard: A name sometimes used to refer to the main printed circuit

board in processing equipment. It usually contains integrated

circuits that perform the processor’s basic functions and provides

connectors for adding other boards that perform special functions.

network: A collection of computers and associated devices that are

connected by communications facilities. A network allows you to

share data and peripheral devices, such as printers, with other

users and to exchange electronic mail.

non-system disk: A disk for storing programs and data that cannot be

used to start the computer. Compare system disk.

nonvolatile memory: Memory that is capable of permanently storing

information. Turning the computer’s power off does not alter data

stored in nonvolatile 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.

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.

online 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

device.

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.

parallel: Processes that occur simultaneously. In communications, it

means the transmission of more than one bit of information at a

time. On your computer, the parallel port provides a parallel

communications interface between the computer and an

appropriate device. Compare 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.

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Toshiba Satellite Pro U400 User Manual Page 169