Richard Phillips Feynman was an American physicist. 

  His many contributions include:

     ♦  Developing  a widely used pictorial representation scheme for the mathematical expressions governing the behavior

          of subatomic particles.

     ♦  Developing the path inegral formulation of quantum mechanics

     ♦  Advances in the theory of quantum electrodyamics

     ♦  Contributions to the physics of the superfluidity of supercooled helium

     ♦  Work in particle physics - proposed the parton model.

     ♦  Assisting in the development of the atomic bomb

     ♦  Pioneering the field of quantum computing

     ♦  Introducing the concept of nanotechnology (creation of devices at the molecular scale)

  Feynman was a joint recipient of the Nobel Prize in Physics in 1965 for his work in quantum electrodynamics