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The original meaning of computing was synonymous with counting and calculating. Since the advent of the computer, it has come to also mean the operation and usage of these machines, as well as the electrical processes carried out within the computer hardware itself.

Computer science --- Theory of computation

Computer hardware --- Computer network --- Computer system
Computer programming --- Computer software

History of computing

Business computing[?]

Accessible computing
Human-computer interaction (Geek Speak)

Computer security

Data
- numeric
  - integral data types - bit, byte, etc.
  - real data types: Float (Floating Point, Single Precision, Double Precision, Fixed Precision, Fixed Width[?])
  - Binary Coded Decimal (BCD)
  - representation: Binary - Octal - Decimal - Hexadecimal (hex)
- character
  - storage: Character - String - Text - Plain text
  - representation: ASCII - Unicode - Multibyte[?] - EBCDIC (Widecharacter[?], Multicharacter[?])
- other topics: Data compression - Digital signal processing - Image processing - Indexed[?]

Classes of computers:

Companies - current

Companies - historic

Professional organisations
- Association for Computing Machinery (ACM)
- British Computer Society (BCS)
- Association for Survey Computing (ASC)
- Institute of Electrical and Electronics Engineers (IEEE), in particular the IEEE Computer Society[?]
- International Electrotechnical Commission (IEC)

Standards organizations and consortiums (see also standardization)
- International Organization for Standardization (ISO)
- Institute of Electrical and Electronics Engineers (IEEE)
- Internet Engineering Task Force (IETF)
- World Wide Web Consortium (W3C)

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