re: WHAT WAS the first PC....
The answer IBM... They called their personal computer the PC.
Now that flys in teh face of what was happening for 15+ years before
that. there were people that were trying make/buy their own personally
owned digital computer. This ranged from buying PDP-8s to recreating
them or other hardware. When the commercial microprocessor became reality
with the 8008 there is little question in my mind that was the pivotal
event leading to Mark-8, altair, Apple-1 and so on.
As one that is old enough and personally active doing that then
makes Donald's minuteman-1 missle computer (surplus) my first contact with
a personal computer (micro be dammed for the moment). That was right
before the intel part hit the news. Video console, hell we were happy to
see a flipflop do exactly that!
Allison