Nikola Tesla was born in 1856 in Austria-Hungary and was an inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system. He immigrated to the United States in 1884 to work for Thomas Edison but later struck out on his own. Some of Tesla's key inventions and contributions included developing the alternating current induction motor and the Tesla coil. He gained fame after helping George Westinghouse develop AC power distribution and winning the contract to power the 1893 World's Fair. Tesla spent his later years conducting experiments in wireless energy transmission and particle beams. He died in 1943 in New York City.