What did Nikola Tesla do for living?

Nikola Tesla symbolizes a unifying force and inspiration for all nations in the name of peace and science. He was a true visionary far ahead of his contemporaries in the field of scientific development. New York State and many other states in the USA proclaimed July 10, Tesla's birthday Nikola Tesla Day. Nikola Tesla was a Serbian American inventor, electrical engineer, mechanical engineer, physicist, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system.