Cheerios

General Mills, the other GM, makers of Cheerios, Golden Grahams, Count Chocular, et al., also delved into defense industry ventures during the War.  Artillery sights, torpedo detectors.  Later the bomb sight for the B-47 Stratojet.

And in the 1964 they built the deep submersible Alvin for $500,000.   Of course, 500 large was a lotta money back in them days.

Not bad.  I did not know that.  And I've always liked plain Cheerios.