KOI8-OKOI8-O, formerly known as KOI8-C, is an 8-bit character set. FreeDOS calls it code page 63342. It supports Reforms of [Russian orthography#The post-revolution reform|Old Russian orthography], as well as the same languages as Windows-1251.Character setThe following table shows the KOI8-O encoding. Each character is shown with its equivalent Unicode code point.