The British public has voted the X-ray machine as the best invention, over the Apollo 10 space capsule and Stephenson's Rocket.
In a poll organised by the Science Museum in London, members of the public voted on the exhibit they thought was the most important. In the top 10, the first three places were filled by medical inventions.
Information on all the items is found at the Science Museum in London.
Rory Cellan-Jones reports.