|Classification||8-bit KOI, extended ASCII|
|Other related encoding(s)||KOI8-U, KOI8-RU|
KOI8-R (RFC 1489) is an 8-bit character encoding, derived from the KOI-8 encoding by the programmer Andrei Chernov in 1993 and designed to cover Russian, which uses a Cyrillic alphabet. KOI8-R was based on Russian Morse code, which was created from a phonetic version of Latin Morse code. As a result, Russian Cyrillic letters are in pseudo-Roman order rather than the normal Cyrillic alphabetical order. Although this may seem unnatural, if the 8th bit is stripped, the text is partially readable in ASCII and may convert to syntactically correct KOI7. For example, "? " in KOI8-R becomes rUSSKIJ tEKST ("Russian Text").
KOI8 stands for Kod Obmena Informatsiey, 8 bit (Russian: , 8 ) which means "Code for Information Exchange, 8 bit". In Microsoft Windows, KOI8-R is assigned the code page number 20866. In IBM, KOI8-R is assigned code page 878. KOI8-R also happens to cover Bulgarian, but has not been used for that purpose since CP1251 was accepted. The use of these older code pages is being replaced with Unicode as a more common way to represent Cyrillic together with other languages.
The following table shows the KOI8-R encoding. Each character is shown with its equivalent Unicode code point.
Letter Number Punctuation Symbol Other Undefined