Dont think they’ve been mentioned..
Sony…
Xerox are probably indirectly responsible for most of the Personal Computer stuff IMHO – There parc people came up wiv mice/gui’s laser printers ethernet.
I amazed they aren’t as big a player in it as they should be.
What made the IBM Pc sucessfull was the DOS operating system ‘bought’ by Bill.
It was reverse engineering of the BIOS which allowed other companys to produce the clones. IBM thought the money was in Hardware (oops)
The Apple II had most of the features of the IBM PC – modular bus that you could stick cards in but no one ever got sacked for buying IBM.. They legitimised the pc market for corporate type 🙂