title: How many bytes does one Unicode character take?
body: <p>I am a bit confused about encodings. As far as I know old ASCII characters took one byte per character. How many bytes does a Unicode character require? </p>
  
  <p>I assume that one Unicode character can contain every possible character from any language - am I correct? So how many bytes does it need per character? </p>
  
  <p>And what do UTF-7, UTF-6, UTF-16 etc. mean? Are they different versions of Unicode?</p>
  
  <p>I read the <a href="http://en.wikipedia.org/wiki/Unicode">Wikipedia article about Unicode</a> but it is quite difficult for me. I am looking forward to seeing a simple answer.</p>