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The terminology, however, is different: What others call a character set, HP calls a symbol set, and what IBM or Microsoft call a code page, HP calls a symbol set code. HP developed a series of symbol sets, [8] [9] each with an associated symbol set code, to encode both its own character sets and other vendors’ character sets.
Switching between character sets was done using the Shift Out and Shift In characters, or alternatively, on systems supporting 8-bit mode, using the high bit of the character. Before the name "Roman-8" was established for the 8-bit variant in 1983, this was sometimes called "8-bit Roman Extension" or "HP Roman-8 Extension".
The Multinational Character Set (DMCS or MCS) is a character encoding created in 1983 by Digital Equipment Corporation (DEC) for use in the popular VT220 terminal. It was an 8-bit extension of ASCII that added accented characters, currency symbols , and other character glyphs missing from 7-bit ASCII.
A character set is a collection of elements used to represent text. [9] [10] For example, the Latin alphabet and Greek alphabet are both character sets. A coded character set is a character set mapped to a set of unique numbers. [10] For historical reasons, this is also often referred to as a code page. [9]
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the ...
Several 8-bit character sets (encodings) were designed for binary representation of common Western European languages (Italian, Spanish, Portuguese, French, German, Dutch, English, Danish, Swedish, Norwegian, and Icelandic), which use the Latin alphabet, a few additional letters and ones with precomposed diacritics, some punctuation, and various symbols (including some Greek letters).
First Japanese electronic character set ECMA-48: 1972 7 bits Terminal text manipulation and colors ISO/IEC 8859: 1987 8 bits International codes ISO/IEC 10646 1991 21 bits usable, packed into 8/16/32-bit code units Unified encoding for most of the world's writing systems. As first introduced in 1991 had 16 bits; extension to 21 bits came later.
The National Replacement Character Set (NRCS) was a feature supported by later models of Digital's (DEC) computer terminal systems, starting with the VT200 series in 1983. . NRCS allowed individual characters from one character set to be replaced by one from another set, allowing the construction of different character sets on the