Unicode

1. <character> A 16-bit character set standard, designed and maintained by the non-profit consortium Unicode Inc.

Originally Unicode was designed to be universal, unique, and uniform, i.e., the code was to cover all major modern written languages (universal), each character was to have exactly one encoding (unique), and each character was to be represented by a fixed width in bits (uniform).

Parallel to the development of Unicode an ISO/IEC standard was being worked on that put a large emphasis on being compatible with existing character codes such as ASCII or ISO Latin 1. To avoid having two competing 16-bit standards, in 1992 the two teams compromised to define a common character code standard, known both as Unicode and BMP.

Since the merger the character codes are the same but the two standards are not identical. The ISO/IEC standard covers only coding while Unicode includes additional specifications that help implementation.

Unicode is not a glyph encoding. The same character can be displayed as a variety of glyphs, depending not only on the font and style, but also on the adjacent characters. A sequence of characters can be displayed as a single glyph or a character can be displayed as a sequence of glyphs. Which will be the case, is often font dependent.

See also Jörgen Bettels and F. Avery Bishop's paper Unicode: A universal character code.

Last updated: 2002-08-06

2. <language> A pre-Fortran on the IBM 1130, similar to MATH-MATIC.

[Sammet 1969, p.137].

Last updated: 2004-09-14

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Nearby terms: unfold/fold « UNI « unicast « Unicode » UniCOMAL » Unicorny » unicos


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