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GLOSSARY



A — that is, the machine generates its

AbacusAn ancient instrument used for own logic.

calculations. It consists of beads which AssemblerA systems program which is

are moved from left to right. (Unit 2) an intermediary between the machine

Access(verb) To get information which and the commercial programs which

is on a storage medium such as tape, are written in a high-level language,

disk or main memory. (Unit 11) (Unit 21)

Access armA device which positions

the recording heads of a disk drive so B

that they can obtain data from a disk. Backup systemA system which

(Unit 15) provides a service when service is lost

AddressThe identification of the from another source. For example,

storage locations in primary memory. cards are used as a backup system in

(Unit 11) case of loss of data from disks or

AlgolA high-level programming tapes, (Unit 13)

language used for mathematical and BasicA high-level programming

scientific purposes. An acronym for language which is used mainly for

ALGOrithmic Language. (Unit 21) writing programs in conversational

AlgorithmA straightforward sequence mode. An acronym for Beginner's

of steps or instructions used to solve a All-purpose Symbolic Instructional

problem. A program is an algorithm. Code. (Unit 21)

(Unit 21) BatchA set of jobs which do not require

AnalogA computer that can simulate interaction with the computer from a

different measurements by electronic terminal and are all processed in one

means. It continuously works out computer run. The input may come

calculations. (Units 2, 6) from cards, disks or tapes. (Unit 22)

Applications programA program BinaryPertaining to a pair; in computer

written in a high-level language. It is terminology it refers to 0 and 1. (Unit 19)

designed to do a specific type of work Binary arithmeticArithmetic which

such as calculate a company's payroll. uses only two numbers, either 0 or 1.

(Unit 21) (Units 10, 19)

Applications softwarePrograms Binary digitA digit in the binary system

designed to solve a specific problem which is either 0 or 1, usually referred

e.g. payroll. (Unit 5) to as bit. (Unit 19)

Arithmetic-Logical Unit (ALU)One of Binary systemA number system which

the components of the CPU. It is made is based on two numbers 0 or 1, it is

up of electronic circuitry which used by digital computers. (Unit 19)

performs the actual arithmetic and BitsBinary digit which is either 0 or 1.

logical operations asked for by a Eight bits equal 1 byte. (Units 7,11,

program. (Units 9, 10) 15, 19)

Arithmetic unitThe same as BlockA physical group of data records

arithmetic-logical unit. on a tape or a disk. A number of

Artificial intelligenceMachine which blocks form a file. (Unit 14)

emulates human processes, e.g. by Block diagramA diagrammatic

breaking a task into parallel sub-tasks representation of the sequence of

which are processed independently of events to be followed in solving a

each other, without explicit instructions problem. A synonym for a flowchart.

(Unit 18)


BPI (Bytes Per Inch)A measure of the density of a tape. (Unit 14)

BreakdownSame as computer breakdown. (Unit 23)

BugsThe errors in a program. (Unit 18)

Bubble memoryConsists of creating a thin film of metallic alloys over a board. When this film is magnetized, it produces magnetic bubbles, the presence or absence of which represents bits of information. (Unit 12)

ByteA group of 8 binary digits or bits which are considered as one unit. 1024 bytes equal 1K. (Unit 11)

C




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