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US subs used a computer called the TDC (Torpedo Data Computer) in WW2

http://upload.wikimedia.org/wikipedia/commons/0/0a/TDCfullview.jpg

an early electromechanical analog computer used for...

I was weened on tubes

careful what you touch

http://comps.fotosearch.com/bigcomps/CSP/CSP922/k9222141.jpg