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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 format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.
In the IBM PC Bios typing an Alt code greater than 255 produced the same as that number modulo 256. [3] Some applications retained this behavior, while others (in particular applications using the Windows RichEdit control, such as WordPad and PSPad ) made numbers from 256 to 65,535 produce the corresponding Unicode character. [ 4 ]
On the iPhone and iPad , special characters are entered using the template {{Unicode|&#x any-four-digit-hex-number ;}}. (Space between { { should be removed.) This will display more accurately in some browsers, compared with the just &#x any-four-digit-hex-number ;. In this operating system, the menus of characters at the bottom of WP ...
Decimal code points in the range 160 –255 must be entered with a leading zero (so that the Windows code page is chosen) and furthermore the Windows code page CP1252 must be used. [ b ] For example, Alt + 0 2 4 7 yields a ÷ , corresponding to its code point, but the character produced by Alt + 2 4 7 depends on the OEM code page , such as Code ...
The most common superscript digits (1, 2, and 3) were included in ISO-8859-1 and were therefore carried over into those code points in the Latin-1 range of Unicode. The remainder were placed along with basic arithmetical symbols, and later some Latin subscripts, in a dedicated block at U+2070 to U+209F.
The C0 Controls, referred to as C0 ASCII control codes in version 1.0, are inherited from ASCII and other 7-bit and 8-bit encoding schemes. The Alias names for C0 controls are taken from the ISO/IEC 6429:1992 standard.
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Font sets like Code2000 and the DejaVu family include coverage for each of the glyphs in the Block Elements range. [4] Unifont also contains all the glyphs. [ 5 ] Among the fonts in widespread use, [ 6 ] [ 7 ] full implementation is provided by Segoe UI Symbol .