Computers
Linus Torvalds, Steve "WOZ" Wozniak, Leo Laporte, Jef Raskin, Bill Gates, Jean-Louis Gassee, John C. Dvorak, Bob Metcalfe, Eric S. Raymond, Richard M. Stallman, John "Maddog" Hall
Music
Hmm....that's a tough one. I would have to say all of the composers from all of the musical eras that have existed. As for musicians that were around during my lifetime, I would have to say Rick Wakeman, Keith Emerson, Chick Corea, Stevie Wonder, Jimmy McGriff, Jimmy Smith, Oscar Peterson, Gonzalo Rubalcaba, Wendy Carlos, Joey DeFrancesco,....jeez, I could go on and on with this one.... :-p I guess pretty much everyone of the musicians that had their part in shaping me into the musician that I am.
Also included in this section are those who helped with the evolution of the synthesizer, one of my favorite instruments: Bob Moog, Don Buchla, Lev Sergeivich Termen (aka Leon Theremin), and many, many others.