Computer Software

Vocabulary

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Bit

the smallest unit of information the computer uses,

electronic signal which is either on (1) or off (0),

Binary digit.

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Program

Instructions that tell the computer what to do,

stored as executable files in bits and bytes,

Examples: MS Windows and MS Word.

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Byte

Group of 8 bits.

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Kilobyte/ KB

about a thousand bytes, 1,024 bytes.

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Application Software

Program written to perform a specific task, like text processing, spreadsheets, etc.,

Example: MS Word.

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Megabyte/ MB

about a million bytes, 1,048,576 bytes.

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Binary

has two values, 1 and 0, used by the computer to work with data, data in the computer is stored like this.

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Gigabyte/ GB

about one billion bytes, 1,073,741,824 bytes.

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ASCII

0/1 code for characters, American Standard Code for Information

Interchange.

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Software

Programs that run on a computer.

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Operating System

Program that allows the user to communicate with the computer,

that manages all the input and output devices of a computer system

that manages all the programs in a computer,

and much more, Examples: Windows XP, Linux.

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System Software

Programs that help managing the computer system,

Programs that help maintaining the computer system,

Examples: Operating System, Disk Defragmenter.