title: What's the difference between encoding and charset?
body: <p>I am confused about the text encoding and charset. For many reasons, I have to
  learn non-Unicode, non-UTF8 stuff in my upcoming work.</p>
  
  <p>I find the word "charset" in email headers as in "ISO-2022-JP", but there's no
  such a encoding in text editors. (I looked around the different text editors.)</p>
  
  <p>What's the difference between text encoding and charset? I'd appreciate it
  if you could show me some use case examples.</p>