The 6502 holds a place of honor amongst the Apple II faithful only slightly lower than that occupied by Steve Wozniak. Apple likes to conclude their press releases with a brief company history that begins with the phrase, “Apple ignited the personal computer revolution in the 1970s with the Apple II”. Well, whether or not the personal computer revolution was truly ignited by Apple may be up for dispute amongst retro computing enthusiasts, but there is no doubt that it was the 6502 from MOS Technology that ignited the imagination of Woz to create the first Apple-1, and later the Apple II. It was as important to Apple as the internal combustion engine was to Henry Ford.
Addendum: Thanks to Ken Gagne’s quick eye, here are two more articles about this: