Apple, by the way, was a co-founder of Arm and helped develop ARM processors for use in the Apple Newton. Its early work on making ARM CPUs highly power efficient paved the way for their now-widespread adoption in mobile devices. There's some irony in how a part of the Apple Newton reverberates throughout the industry today.
Acorn supplied the engineers, VLSI supplied the manufacturing, Apple supplied the money
https://electronics.howstuffworks.com/gadgets/high-tech-gadg...
If they had kept their stake instead of selling it off they would own the majority of the entire computing world by now.