I'm afraid I need evidence that we owe those technologies to aliens.
You don’t need evidence, but you want proof-i-ness. . . Certainly no points taken off for curiosity. Many of the technologies available back then simply took bits’n’parts and integrated ideas and hypothesized functions to further developments already underway because of post war concerns. An amalgamation of ingredients and observations, so to speak, probably best describes early research and development as it was – still does actually. Don’t take this the wrong way, but I’m not obligated to do your bidding, besides it’s the classic security measure not to be available, anyway, not even from the manufacturers as it’s not meant to be traceable. . . Nor will I give you click bait links to some lame story. . . Air gaps work wonders in many trades and this is one of them. . . Beliefs are a fickle-thing and they’re best left alone. Manufacturers aren’t obligated either, as it could be deemed as industrial espionage from their perspective and the inquisitor made a person of interest. They take their patents and profits very seriously in a capitalist economy.
If truly interested you could set out on your own investigation to research and inquire where they’re fabricated and manufactured as well as do a historical check on the basic ideas and their formulation into usable hardware - or simply do without knowing like many people do - not caring where the ideas or technology came from or how long it was in the making for consumer purchase, just so long as it works . . . *click,* *tap,* *swipe.* There’s actually quite a bit that goes into an end product such as a device that extends an otherwise limited sensory apparatus as human vision.
You could simply mark those developments down to gifts of fire, I suppose, but don’t blame Prometheus . . . And I a crank. . . I’m not concerned as name calling is bunk anyway. . . Appreciate that inquiry, though, and half expected it and knew an easy out answer wouldn’t be forthcoming, too, as it’s not meant to be. . . Ask yourself, “Do magicians reveal their secrets before their stage show?” . . . They deliberately mean to test ones skills of observation for slight-of-hand maneuvers. It’s unfortunate, but knowing too much puts one at risk in this not-so-safe world. I might have been better off not participating on an open forum subject to nefarious searches, but I chose to add to a discussion not resolve it as research and development is on going with or without beliefs. . .Besides, credibility is easily fabricated to be convincing and what was said remains plausible without proof-i-ness.
“Be sure you’re right . . . then go ahead.” ~ Davy Crockett
Have a good day