title: What do these signs mean in Vim?
body: <p>I've a hard time understanding signs I see in my text editor Vim. I see signs like <code>^@</code> and <code>^A</code> and <code>^M</code> and <code>^F</code>. What does this mean? Is there any structured list of these signs and their meaning?</p>
  
  <p>Trying to google it is a dead end since Google will not search for "^@".</p>