If you use a mouse and GUI, it was because of Steve Jobs and Steve Wozniak. They saved it from being trashed by Xerox who initially thought it was a bad idea. Apple made the mouse popular and revolutionized how music was distributed. The company certainly has a colorful history.
Steve and Apple's legion of zealous fans certainly helped change key aspects in how we work with information with our computing devices.
Personally for me, I find it admirable that he was able to take an injured, ailing company and nursed it back to health to an unimagined level with his vision. Remember, back in the late 90's Apple was considered pretty much dead and done. The irony is that he wasn't able to do it for himself.