title: What is a vertical tab?
body: <p>What was the original historical use of the vertical tab character (<code>\v</code> in the C language, ASCII 11)?</p>
  
  <p>Did it ever have a key on a keyboard? How did someone generate it?</p>
  
  <p>Is there any language or system still in use today where the vertical tab character does something interesting and useful?</p>