2) First true multi-tasking operating system that came standard on a PC (Unix machines weren't PCs back then they were workstations)
I agree with your statement, but I cringe whenever somebody refers to an Amiga as a PC. Sure it's a "personal computer", but not a PC which is the short form for the "IBM PC/AT or clone". Otherwise the statement "screenshots are from the PC version" would be meaningless.
Back when the Amiga was released, small computers were referred to as "microcomputers" (but most people just said "computer"). It was only around 1992-93 that I first started hearing people say "my PC" instead of "my computer" - because most people started getting IBM PC/ATs. (that's also when I started cringing... ;-) )
