100 years of existence of the International Union of Pure and Applied Physics, IUPAP

IUPAP is the only global international Scientific Union dedicated to all areas of physics. It is run by physicists from all fields and continents The mission of the Union is to assist in the worldwide development of physics, to foster international cooperation in physics, and to help in the application of physics toward solving problems of concern to humanity. The talk gives an overview from what happened in the last 100 years