Light Bulb
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Thomas Edison replaced the gaslight by creating an inexpensive electric light. He established the Edison Light Company with the help of J.P. Morgan and the Vanderbilts. Edison changed the way of life during the Gilded Age.
Telephone
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Alexander Graham Bell invented the telephone in the 1870s. The invention changed the world because it made it much faster to communicate with people. It improved the telegraph system that was used before the invention of the telephone.
Phonograph
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The phonograph was invented in 1877 by Thomas Edison. It was the world's first record player and it changed the way music was listened to forever. It revolutionized the entertainment industry as well as made it easy for the blind to read books by just listening.
Motion Picture Projector
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Thomas Edison created the kinetoscope in 1889. It was a machine that projected images on a screen. It did what the phonograph did for the blind. The kinetoscope helped the deaf see pictures on a screen.