What was the first computer?

Question: What was the first computer?
- Keywords:
  computer,
  first
Asked by macintoshisbetterthanpc to David on 21 Jun 2011.
- David Corne answered on 21 Jun 2011:
  
  Some say it was Stonehenge, which is a kind of physical computer for working out whether or not today is the summer solstice. But the first computer with all the key bits that modern computers have was the “Manchester Baby”, just over 60 years ago. See various pics of it here:
  http://www.computer50.org/mark1/gal1.html

Question: What was the first computer?