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Sure enough, that '66 mobile network never became a teen "must have" - in Norway, there were almost 200 persons per phone for this system. Nevertheless, in the 70s, most Norwegian kids were well familiar with mobile phones.
#2 - Even the ENIAC is a "first" only if additional criteria are specified. The German Zuse machines preceeded ENIAC by several years, as did the British Colossus machines.
If we restrict ourselves to US developments, even the Harvard Mark I preceeded ENIAC by two years - but I guess most people imply "ELECTRONIC computer" when they say "computer" - Mark I was an electromechanical relay machine.
For the hard drive, no year or manufacture is specified - I suspect that it is an IBM 305 RAMAC, 1956 vintage. We certainly had hard drives long before they reached 5 Mbyte size - I've got articles dated 1950 and 1951 discussing alternate technologies for rotating magnetic storage, with photographs of such equipment. The IBM 305 was the first model offered commercially on the open market, but it certainly wasn't the first hard drive.
#1, "paan american"? what?
#5, the first photo was of a star destroyer?