Quote:
Originally Posted by August
 We called them P-38's and there were always a dozen or so tossed in the bottom of each C-rat case. Folks tended to keep them since they were such a handy tool.

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Interesting. A very successful yet simple design. In production since 1942.
http://en.wikipedia.org/wiki/P-38_can_opener
Of course, when you mention P-38 most people will think this.
Well, they certainly opened the can Admiral Yamamoto was flying in.