Apple of course invented the personal computer with the Apple 2. IBM a long time thought - no market and with the privatisation of the computermarket. IBM brought 1981 their Personal Computer. 1985 Apple brought (after LISA) GUI on the market. IBM lost against the Compatibles and the rest ist history.
Steve Jobs in his talk at ETH 1990/1?
Question: “What do you think about IBM”
Jobs: “We are ok. They licencsed our NExT-Software”
NExT
Jobs, Steve