ISO/IEC 8859-5:1999,Information technology — 8-bit single-byte coded graphic character sets — Part 5: Latin/Cyrillic alphabet, is part of theISO/IEC 8859 series of ASCII-based standardcharacter encodings, first edition published in 1988. It is informally referred to asLatin/Cyrillic.

It was designed to cover languages using aCyrillic alphabet such asBulgarian,Belarusian,Russian,Serbian andMacedonian but was never widely used. The 8-bit encodingsKOI8-R andKOI8-U,IBM-866, and alsoWindows-1251 are far more commonly used. In contrast to the relationship betweenWindows-1252 andISO 8859-1, Windows-1251 is not closely related to ISO 8859-5. However, the mainCyrillic block inUnicode uses a layout based on ISO-8859-5.

ISO 8859-5 would also have been usable forUkrainian in theSoviet Union from 1933 to 1990, but it is missing theUkrainian letterge, ґ, which is required inUkrainian orthography before and since, and during that periodoutside Soviet Ukraine. As a result, IBM createdCode page 1124.

ISO-8859-5 is theIANA preferred charset name for this standard when supplemented with theC0 and C1 control codes fromISO/IEC 6429. TheWindows code page for ISO-8859-5 iscode page 28595 a.k.a.Windows-28595.^[3] IBM assignedcode page 915 to ISO-8859-5 until that code page was extended.

Differences fromISO 8859-1 are shown with itsUnicode equivalent code point.

The ECMA-113 standard has been equivalent to ISO-8859-5 since its second edition,^[4] its first edition (ISO-IR-111) having been an extension of the earlierKOI-8 (defined by GOST 19768-74), which lays out the Russian letters in the same way as their ASCII Roman equivalents where possible. The initial draft of ISO-8859-5 (DIS-8859-5:1987) followed ISO-IR-111, but was revised^[4] after GOST 19768-74 was replaced^[5] by the newISO-IR-153 in 1987, which re-arranged the Russian letters into alphabetical order (except for Ё).^[5][6] ISO-IR-153 contains the Russian letters, including Ё, and the non-breaking space and soft hyphen, whereas the full Cyrillic set of ISO-8859-5 is also called ISO-IR-144.^[7]

Possibly as a consequence of this confusion,RFC 1345 erroneously listsyet another code page as "ISO-IR-111", combining the letter order and case order of ISO-8859-5 with the row order of ISO-IR-111 (and consequently compatible with neither in practice, but in practice partially compatible^[2] withWindows-1251).^[8][2]

IBMCode page 915 is an extension of ISO/IEC 8859-5, adding somesemigraphic and other symbols in theC1 area. IBMCode page 1124 is mostly identical to ISO-8859-5, but replaces ѓ with ґ forUkrainian use.

ISO-IR-200, "Uralic Supplementary Cyrillic Set",^[9] was registered in 1998 by Everson Gunn Teoranta (whichMichael Everson was a director of, prior to the founding ofEvertype in 2001),^[10] and changes several of the non-Russian letters in order to support theKildin Sami,Komi andNenets languages, not supported by ISO-8859-5 itself. Michael Everson also introducedMac OS Barents Cyrillic for the same languages on classic Mac OS. FreeDOS calls itcode page 59283.^[11]

ISO-IR-201, "Volgaic Supplementary Cyrillic Set",^[12] was similarly introduced by Everson Gunn Teoranta in order to support theChuvash,Komi,Mari andUdmurt languages, spoken in the titularrepublics of Russia. FreeDOS calls itcode page 58259.^[13]

• ISO-IR 144 Cyrillic part of the Latin/Cyrillic Alphabet(May 1, 1988, from ISO 8859-5 2nd version)
• ISO/IEC 8859-5:1999
• Standard ECMA-113: 8-Bit Single-Byte Coded Graphic Character Sets - Latin/Cyrillic Alphabet3rd edition (December 1999)

• ISO/IEC 8859
• Computer-related introductions in 1988
• Cyrillic script

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• Short description matches Wikidata