What is Unicode?
In short, Unicode is a sixteen-bit code designed to support international languages like Chinese and Japanese. These languages have too many characters to be represented by the eight-bit ASCII and EBCDIC codes. Unicode was developed by Unicode, Inc.<http://www.unicode.org/>, with support from Apple, IBM, and Microsoft.
If your interested in learning more about Unicode, you can try these sites:
http://www.unicode.org/ ( Organization that created Unicode. It's a huge site and it's easy to get lost in there.)
http://lib.ua.ac.be/KB/pn/pnoerr0.html (A good, concise site about Unicode -- if you looking for an introduction to Unicode; this is the best site to go.)
http://www.hclrss.demon.co.uk/unicode/ (up till now, the best site I've encountered for Unicode and it's resources.)