Moore's Law is the observation that silicon transistors shrink to half their size every two years. Silicon transistors are semiconductor devices used to amplify and switch electronic signals and electrical power—the very foundation of modern electronic devices. Moore's Law accounts for the rapid improvement of such functions as screen resolution, processing speed, and memory capacity. So, how small can you get? IBM researchers, working at the forefront of nanotechnology, say "Moore's Law ends at the individual atom. Physically speaking, we can't get smaller than that."