Neo

Thomas A. "Tom" Anderson (alias Neo) is a fictional character in The Matrix, The Matrix Reloaded, and The Matrix Revolutions, as well as having a cameo in The Animatrix short film, Kid's Story. He was portrayed by Keanu Reeves in The Matrix Trilogy and The Animatrix. Andrew Bowen provided Neo's voice in The Matrix: Path of Neo. The character Neo lives in the world of the Matrix, an illusory construct in which humans are neurally connected to a gigantic computer system which simulates the world of the late 20th century. This system has been developed by intelligent machines to keep the human population as tools for the machines' survival - the machines use a form of fusion in addition to the bioelectrical energy of human beings as their primary energy source. Previously, the machines had relied upon solar power, after the war between humans and machines broke out, humans cut off the machines' energy source by creating an immense cloud of nanomachines that blocked out the sunlight ... full article at wikipedia