Numeric Keypad - AMSTRAD CPC464 User Manual

Modem
A MOdulator DEModulator that connects the computer's I/0 to a telephone line or other
serial data transmission medium -incuding fibre optics. Also see acoustic coupler.
Monitor
The screen section of a computer terminal system, and also a term describing a machine
language program that provides access to the fundamental machine language operation of
the computer.
MSB
The Most Significant Bit of a binary number: the bit at the left end of the expression.
Mouse
An upside-down tracker or roller ball. Pushed around a table top by hand, a mouse is
generally used to move a cursor around the screen. Originally designed to overcome the fear
of keyboards and make software appear more'user ftiendly'.
Network
When two or more computers are linked together to exchange data and information - either
by wiring, or via MODEMs.
Nibble
Half a byte: a four bit binary expression. Each of the hexadecimal digits in the expression
&F6 representsone nibble'.
Noise
The CPC464 sound facility includes a facility to inject a variable amount of random noise by
using the SOUND command to create effects such as explosions.

Numeric keypad

The area on the keyboard where number keys are grouped to facilitate entry of numeric data,
and in the case of the CPC464, to provide the additional facility of user definable function
keys.
OCR
Optical Character Recognition. A means of reading printed or written characters with an
optical reader and translating them directly into computer readable data.
Octal
A number system to the base 8, where each digit (0-7) is constructed from three Bits.
Off line
A computer peripheral - usually a display terminal or a printer - that is not actively
connected to, or accessible by, the main processing unit.
On line
The opposite of Off line.