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On IBM PC compatible personal computers from the 1980s, the BIOS allowed the user to hold down the Alt key and type a decimal number on the keypad. It would place the corresponding code into the keyboard buffer so that it would look (almost) as if the code had been entered by a single keystroke.
As of Unicode version 16.0, there are 155,063 characters with code points, covering 168 modern and historical scripts, as well as multiple symbol sets.This article includes the 1,062 characters in the Multilingual European Character Set 2 subset, and some additional related characters.
It includes Ñ for Spanish, Asturian and Galician, the acute accent, the diaeresis, the inverted question and exclamation marks (¿, ¡), the superscripted o and a (º, ª) for writing abbreviated ordinal numbers in masculine and feminine in Spanish and Galician, and finally, some characters required only for typing Catalan and Occitan, namely ...
IBM states that AltGr is an abbreviation for alternate graphic. [3] [4]Sun Microsystems keyboard, which labels the key as Alt Graph. A key labelled with some variation of "Alt Graphic" was on many computer keyboards before the Windows international layouts.
Thus "H₂O" (using a subscript 2 character) is supposed to be identical to "H 2 O" (with subscript markup). In reality, many fonts that include these characters ignore the Unicode definition, and instead design the digits for mathematical numerator and denominator glyphs, [ 3 ] [ 4 ] which are aligned with the cap line and the baseline ...
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Date/Time Thumbnail Dimensions User Comment; current: 13:27, 13 May 2018: 900 × 300 (146 KB): Cousteau: Added € to AltGr-E as is most common on Spanish keyboards, but kept the one on AltGr-5 which also works on Windows to avoid discrepancy in articles (e.g. w:en:QWERTY#Spanish), although this placement is uncommon and could be deleted.
The Unicode Standard encodes almost all standard characters used in mathematics. [1] Unicode Technical Report #25 provides comprehensive information about the character repertoire, their properties, and guidelines for implementation. [1]