The Colossus, EDSAC and Harwell Dekatron (WITCH) were some of the first electronic computers. In this video I check them out at the National Museum of Computing, along with an ICL 2966 mainframe from the 1980s.

This video was produced with the kind cooperation of the National Museum of Computing, who checked the script for factual accuracy. The museum is located at Bletchley Park in the UK, with its website at: http://www.tnmoc.org/

Note that my intertitle which says "Harwell Dekatron (WHICH)" contains a typo -- it should say "Harwell Dekatron (WITCH)". Sorry about this. :(

My second report from the National Museum of Computing -- looking at early PCs -- is here:    • Early PCs at the National Museum of C...  

If you enjoy these videos, you may also like my coverage of some early laptop and mobile computers:

Toshiba 5100:    • Classic PC: Toshiba T5100  

Atari Portfolio:    • Classic PC: Atari Portfolio  

Apple Newton Messagepad:    • Classic PC: Newton MessagePad 110  

Psion 7:    • Classic PC: Psion 7  

More videos on computing-related topics can be found at:    / explainingcomputers  

You may also like my ExplainingTheFuture channel at:    / explainingthefuture