How mechanical computing devices work

[johnridley]

From the US Navy; how fire control computers work. This is really cool.

What's really fun is that the description and action on the video is good enough that you can figure out how it works before they explain.

part 1:
http://www.youtube.com/watch?v=_8aH-M3PzM0
part 2:
http://www.youtube.com/watch?v=w-wemKmlaBk
part 3:
http://www.youtube.com/watch?v=mQhmmTX5f9Y
part 4:
http://www.youtube.com/watch?v=T_xhMykK5Hw
part 5:
http://www.youtube.com/watch?v=KIWj8Md4Zx0
part 6:
http://www.youtube.com/watch?v=quodLgEiZh4
part 7:
http://www.youtube.com/watch?v=TkVak9wU4DY