Stanley Bing writes a thank-you column :
I want to thank you for my mouse. Can you imagine a world without mouses? I can't. Before you bred them for commercial use, a person needed a host of keyboard commands to get anything done, and a lot of programming code to produce words and numbers on paper. I read somewhere that you got the vision after you visited Xerox's PARC. They showed you what they were up to, but they sort of didn't know what they had. You ran with it. Because that's the way you did everything. All in. Feet first.
Be sure to read the entire thing.