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Currency sign (typography)
The currency sign (¤) is a character used to denote an unspecified currency. It is often used in place of a symbol that is not present in the font in use; for example, in place of the colón ((unicode:₡)). It can be described as a circle the size of a lowercase character with four short radiating arms at 45° (NE), 135° (SE), 225°, (SW) and 315° (NW). It is raised slightly above the baseline. It is represented in Unicode as .
The currency sign was once a part of the Mac OS Roman character set, but Apple changed the symbol at that code point to the euro sign (€) in Mac OS 8.5. In non-Unicode Windows character sets, the euro sign was introduced as a new code point. In the Unicode character set, each of the two symbols has its own unique code point across all platforms.
The symbol is available on some keyboard layouts, for example French, Danish, Norwegian, Swedish, Finnish and Estonian.〔(IBM Logical keyboard layout registry index for countries and regions around the world. )〕
==History==
The symbol was first encoded for computers in 1972, as a replacement for the dollar sign in national variants (ISO 646) of ASCII and the International Reference Variant.〔()〕 It was proposed by Italy〔(Character histories – notes on some Ascii code positions )〕 to allow an alternative to encoding the dollar sign. When ISO 8859 was standardized, it was placed at 0xA4 in the Latin, Arabic and Hebrew character sets. There was not room for it in the Cyrillic set, and it was not included in all later added Latin sets. In particular, Latin 9 replaces it with the euro sign. In Soviet computer systems (usually using some variant of KOI8-R character set) this symbol was placed at the code point used by the dollar sign in ASCII.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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