Unicode Standards is a global encoding standards which is accepted by all of the OS Venders and System makers. In the early 2000, The Mongolian Unicode Proposal had been accepted by the ISO Organization and Unicode Consortium. Just because of the implementation method of the Mongolian Unicode is very difficult and not exist till the Windows Vista support it by OpenType Font rendering techniques. Now, the Unicode Mongolian Encodings, can be supported by OpenType Font rendering techniques on Windows, Linux & Unix. and by AAT Font rendering techniques on Mac OS X, iOS.