Editing Koppa (letter) (section)

==Unicode==
The [[Unicode]] character encoding standard originally (since version 1.1 of 1993), had only a single code point for Koppa, which was marked as uppercase and could be used either for an epigraphic or a numeral glyph, depending on font design. A lowercase form was encoded in version 3.0 (1999).<ref name="unicode_changes">{{cite web|author=Unicode Consortium|url=https://www.unicode.org/Public/UNIDATA/DerivedAge.txt|title=Unicode Character Database: Derived Property Data
|access-date= 2010-09-25}}</ref><ref name="eversoncase2">{{cite web|url=http://dkuug.dk/jtc1/sc2/wg2/docs/n1743.pdf|title=Additional Greek characters for the UCS|last1=Everson|first1=Michael|year=1998}}</ref> A second pair of code points specifically for the original closed epigraphical shape was introduced in version 3.2 (2002).<ref name="unicode_changes"/> This left the older two code points (U+03DE/U+03DF, Ϟϟ) to cover primarily the numeral glyphs.

As of 2010, coverage of these code points in common computer fonts is therefore still inconsistent: while the most commonly used version of the numeral glyph will be located at the lowercase code point U+03DF in recent fonts, older fonts may either have no character at all or a version of the closed epigraphic form at that position. Conversely, older fonts may have the numeral glyph at the uppercase code point, while this position may be filled with any of several less common glyphs in newer ones. Since there had never been a consistent typographic tradition for a specifically uppercase numeral ''koppa'', the typographer Yannis Haralambous proposed two new variants for it, <span style="background-color: white;">[[File:Greek Koppa uc 01.svg|x16px]]</span> and <span style="background-color: white;">[[File:Greek Koppa uc 02.svg|x16px]]</span>, noting that he himself found them not "entirely satisfactory".<ref name="haralambous">{{cite web|last=Haralambous |first=Yannis |title=From Unicode to typography, a case study: the Greek script |url=http://omega.enstb.org/yannis/pdf/boston99.pdf |year=1999 |url-status=dead |archive-url=https://web.archive.org/web/20110615031345/http://omega.enstb.org/yannis/pdf/boston99.pdf |archive-date=2011-06-15 }}</ref> A [[serif]]ed version similar to his ''koppa'' was adopted as the reference glyph for the Unicode code charts, along with a lowercase form with heavy curved arms and pointed angles: <span style="background-color: white;">[[File:Greek Koppa lc curved.svg|x16px]]</span>. Some current Unicode fonts have adopted these new shapes, while many font designers have opted for some combination of the more traditional glyphs, including the uncial and the lamedh-shaped ones.<ref name="nicholas_numeric">{{cite web|first=Nick|last=Nicholas|url=http://www.tlg.uci.edu/~opoudjis/unicode/numerals.html#sampi|title=Numerals|access-date=2010-08-12|url-status=dead|archive-url=https://archive.today/20120805203248/http://www.tlg.uci.edu/~opoudjis/unicode/numerals.html#sampi|archive-date=2012-08-05}}</ref>

* {{unichar|03D8}}
* {{unichar|03D9}}
* {{unichar|03DE}}
* {{unichar|03DF}}