Hi: A colleague just sent me this:

I don't know if you have seen this before, but last night I stumbled on an old training video describing how some of the basic components in a post WW2 mechanical fire control computer work. It was fascinating to see how they did integration, trigonometry, multiplication etc.

It was a really interesting way to spend 41 minutes, hope you enjoy it.

https://www.youtube.com/watch?v=s1i-dnAH9Y4

(It makes a good change from the subject of email! :-) Cheers Brian Randell School of Computing Science, Newcastle University, Newcastle upon Tyne, NE1 7RU EMAIL = Brian.Randell@ncl.ac.uk PHONE = +44 191 208 7923 URL = http://www.ncl.ac.uk/computing/staff/profile/brian.randell