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cxc syllabus glossary- this is a guide to the main word needed to

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cxc syllabus glossary- this is a guide to the main word needed to
GLOSSARY

WORD
DEFINITION

Address
The identification of a particular location in memory where a data item

or instruction is stored.

Algorithm
A sequence of instructions which rigorously defines a solution to a

problem.

Antiglare screen
A polarized screen attached to the front of the monitor, which reduces

eye strain.

Assembler
A program which converts
ASSEMBLY
LANGUAGE into MACHINE

CODE to be used by a computer.

Automation
Computer control of machines and processes.

Backing storage
Memory external to the computer used for storage of large quantities of

data or large programs. Backing store is also known as secondary store,

auxiliary store or external store.

Bandwidth
A characteristic of a communication channel that determines the speed

at which data can be transmitted over the channel.

Bar code
A series of thick and thin black bars separated by spaces of varying

widths representing data.

Baud
A unit of speed in data transmission system which now represents one

data signal per second.

BCD
BCD is an abbreviation for Binary-Coded-Decimal. In this number

system, each digit of a number is written as a BINARY number, rather

than converting the whole number. For example, 47 would be coded as

01000111, the binary codes for 4 and 7. Contrast this with 101111,

which is the true binary code of 47.

Bistable device
A device which can exist in two discrete stable states.

Bit
An acronym for binary digit. It can have a value of 1 or 0.

Blog
Short for "Web log". A blog is an online journal or diary of an individual’s

opinions and latest news. It is updated regularly, in chronological order. Many

blogs allow visitors to make comments, or “postings” in response to the blogger, or

to ask questions.

CXC 30/G/SYLL 08 47

WORD DEFINITION

Broadband A term used to describe a technology that provides bandwidth that is greater

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