Windows-1251 is an 8-bit character encoding, designed to cover languages that use the Cyrillic script such as Russian, Ukrainian, Belarusian, Bulgarian, Serbian Cyrillic, Macedonian and other languages.
[7][8][9][10][11][12][13] Windows-1251 and KOI8-R (or its Ukrainian variant KOI8-U) are much more commonly used than ISO 8859-5 (which is used by less than 0.0004% of websites).
Each character is shown with its Unicode equivalent and its Alt code.
An altered version of Windows-1251 was standardised in Kazakhstan as Kazakh standard STRK1048, and is known by the label KZ-1048.
It differs in the rows shown below: Code Page 1174 is another variant created for the Kazakh language, which matches Windows-1251 for the Russian subset of the Cyrillic letters.