This document discusses antimatter power generation. It begins by introducing antimatter and its properties, such as positrons and antiprotons having opposite charge from normal matter but the same mass. Large particle accelerators like the LHC can produce antimatter. Antimatter could power spacecraft by annihilating with matter to produce thrust. It could also generate electricity through controlled annihilation reactions. Positron emission tomography uses antimatter annihilation to produce signals to image organs in the body. While antimatter power could be very efficient, antimatter is also discussed as a potential weapon due to the large energy release from matter-antimatter annihilation.