Definitions by Quantum Electro Dynamics

Q.E.D. 

QED is quantum Electro dynamics. Originally discovered by Richard Feynman. QED is the theory of electrodynamics. To simplify, it shows how light and matter interact

Feynman won a nobel peace prize for discovering Q.E.D.

Q.E.D. by Quantum Electro Dynamics December 18, 2015