I'm curious - can you find an earlier reference by IBM than the 1967 ad for the HP 911A personal computer? Or the Sphere 1 computer systems with integrated keyboards and displays in 1975? Interestingly, three months after Sphere started selling their assembled computers (previously available as a kit), IBM sold it's first 'PC', the 5100 PC, which stood for 'portable computer' - though 55 pounds, I think, is hardly considered 'portable.'
The IBM 5150 PC, or Personal Computer, was in 1981, four years after the Apple II, the Commodore PET and the Radio Shack TRS-80, all of which were a far cry cheaper and rather plentiful by the time IBM got into the game.
But thanks for playing!
because an apple is a PC. GOTCHYA!
I told you to sit down.