the V-1 or "buzz bomb" was an automatic aircraft (known as a "cruise missile"

was a ballistic missile" that flew into space before falling down on it's target

Electronic computers were developed by the british for breaking the Nazi "Enigma" codes

a radar allowed nations to track incoming air attacks, guided bombers to their targets, and directed anti-aircraft guns toward airplanes 

during their bombing raids, Allied bombers dropped thousands of tiny strips of tinfoil, code-named “window” and “chaff” to jam enemy radar.