ISO-8859-5 :: charset=iso-8859-5
ANSI (Windows) 1251 :: charset=windows-1251
OEM (DOS) 855 - Cyrillic
OEM (DOS) 866 - Russian :: charset=cp866
KOI8-R :: charset=koi8-r :: used in Russian newsgroups and emails
KOI8-U :: charset=koi8-u :: used in Ukrainian newsgroups and emails