Where would we all be without computers, cell phones, laptops or PDAs?  If it were not for the men and women on this list of the Top 50 tech visionaries, what would the world look like?  We’d likely all still be beating rocks together in our living rooms, pretending it was music.  Okay, maybe it wouldn’t be that bad, but we certainly would not be where we are today.

So PC World has taken the time to make this list of wonderful people, and let us know why each and every one of them has affected our lives in ways we can barely understand.  From Bill Gates to the men behind Google to the men who created the world’s first integrated circuits, these geniuses have shaped our lives and the ripples of their greatness will be felt throughout the 21st century.  Check out the list to find out which of these men you owe a debt of gratitude the most.