Nikola Tesla (1856-1943) was a Serbian-American inventor, electrical and mechanical engineer, and futurist best known for his contributions to the modern alternating current (AC) electricity supply system. Born and raised in the Austrian Empire, Tesla studied engineering and physics in the 1870s, gaining practical experience working in telephony and at Continental Edison in the new electric power industry. In 1884 he emigrated to the United States, where he became a naturalized citizen. In 1943, at the age of 86, Tesla died alone in Room 3327 of the Hotel New Yorker, in the neighborhood of Manhattan in New York City. Two days later the F.B.I. ordered the property custodian to seize Tesla's belongings. We can say that Nikola Tesla was an extraordinary scientific genius, a modern Leonardo Da Vinci. Many argue that a large part of his inventions have been classified by the US Government for understandable economic and military reasons. The name of Nikola Tesla has now entered into legend and has become synonymous with "scientific revolution", "free energy" and "future". My Inventions, first published in 1919 in the Electrical Experimenter, is the Nikola Tesla's autobiography.