title: Why 255 is the limit
body: <p>I've seen lots of places say:</p>
  
  <blockquote>
    <p>The maximum number of characters is 255. </p>
  </blockquote>
  
  <p>where characters are ASCII. Is there a technical reason for that? </p>
  
  <p><strong>EDIT:</strong> I know ASCII is represented by 8 bits and so there're 256 different characters. The question is why do they specify the maximum NUMBER of characters (with duplicates) is 255. </p>