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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who has been described as America's greatest inventor. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. These inventions, which include the phonograph, the motion picture camera, and early versions of the electric light bulb, have had a widespread impact on the modern industrialized world. He was one of the first inventors to apply the principles of organized science and teamwork to the process of invention, working with many researchers and employees. He established the first industrial research laboratory.Edison was raised in the American Midwest; early in his career he worked as a telegraph operator, which inspired some of his earliest inventions.
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Plovdiv (Bulgarian: Пловдив, pronounced [ˈpɫɔvdif]) is the second-largest city of Bulgaria, located in the historical region of Thrace. It has a population of 346,893 as of 2018 and 675,000 in the greater metropolitan area. Plovdiv is the culture capital of Bulgaria. It is an important economic, transport, cultural, and educational center. There is evidence of habitation in Plovdiv dating back to the 6th millennium BCE, when the first Neolithic settlements were established.
During most of its recorded history, Plovdiv was known in the West by the name Philippopolis (Greek: Φιλιππούπολη; Turkish: Filibe; "Philip's Town") after Philip II of Macedon conquered the city in the 4th century BCE. The city was originally a Thracian settlement and subsequently was invaded by Persians, Greeks, Celts, Romans, Goths, Huns, Bulgars, Slavs, Rus people, Crusaders, and Turks. On 4 January 1878, at the end of the Russo-Turkish War (1877–1878), Plovdiv was taken away from Ottoman rule by the Russian army. It remained within the borders of Bulgaria until July of the same year, when it became the capital of the autonomous Ottoman region of Eastern Rumelia. In 1885, Plovdiv and Eastern Rumelia joined Bulgaria.
Plovdiv is situated in a fertile region of south-central Bulgaria on the two banks of the Maritsa River.