Taken from:

ftp://ftp.nada.kth.se/pub/i18n/c3/current-release/c3-ap45/doc/c3-intro.txta

8-bit ISO 8859 family:
   Latin-Cyrillic 8-bit character set               ISO 8859-5


8-bit character sets similar to ISO 8859 character sets:
   MS Windows Cyrillic character set                MS CP1251


IBM PC code pages:
   Original IBM PC character set                    IBM CP437
   International IBM PC character set               IBM CP850
   Cyrillic IBM PC code page                        IBM CP861


Other 8-bit ASCII-based character sets:
   Macintosh Cyrillic character set
   Hewlett-Packard ROMAN8
   Adobe PostScript Standard Text Encoding
   NeXT NeXTstep