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Thomas Alva Edison by Maxim Rassolov
Thomas Alva Edison (11 February 1847 – 18 October 1931) is a world famous American inventor and entrepreneur. That was he who suggested the word “hello” to start a telephone conversation.
He began working at the age of 12 – he was a delivery boy in trains, a station telegrapher when he applied his first invention – a telegraphic answering machine.
In 1879, in the 3000 people Edison publicly demonstrated his electric light bulbs, lighting of your home, lab and several surrounding streets. It was the first bulb with a long service life, suitable for mass production.