Thank China for your toothbrush

[DEATH eVADER]

did you know HDTV was tested by the British in 1936?? look it up...The more you Know

It depends on the definition of High Def. Two of them were Baird 240 line and Marconi-EMI 405 line

I know frequency hopping (Wi Fi as a recent incarnation) was invented in the 1940's originally used to make radio controlled torpedoes harder to detect or jammed