How old is the oldest computer? – I'm a Scientist 2024/25

Question: How old is the oldest computer?
- Keywords:
  computer,
  history,
  oldest
Asked by east519eths to Tim C, taylorannesingletary, sirajsayed, Sheridan, Neil B, John Easton, Jarrod H, Henry D, Edward on 15 Jan 2025.
- Sheridan Williams answered on 15 Jan 2025:
  
  The oldest electronic digital computer is 1943 and called Colossus.
  The joint-oldest general purpose electronic computer is EDSAC.
  Both can be see at the National Museum of Computing
  The oldest mechnical computer was Charles Babbage’s Analytical Engine which was never built.
  There othe contenders to the above but these are the ones most people agrre on.

Question: How old is the oldest computer?