The ASCII character set matches the first 128 values of a broader language known as Unicode (see http://qcpages.qc.edu/~nixon/links/asciiUnicode.html). Unicode values range from 0 to 65,535, and contain encodings of the character sets for most languages of the world.
Related links:
http://en.wikipedia.org/wiki/ASCII
http://en.wikipedia.org/wiki/Unicode