What was invented during World War 2?

Here are a few

I'm sure there were many but here are three for you off the top of my head. Always assuming that you were looking for military inventions. First the obvious... The Atom Bomb. Second the Higgins landers. (The boats that the alies used to land troops on beachs, Most notably Normandy.) And the Germans had a bunch of inventions at the time but the one that really comse to mind is the Jet Fighter. (The first Jet AIRCRAFT actually took off 5 days before the war started. German as well.)