Who invented the first computer, camera, and stereo/record player? When were they invented?

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Computers-- If you mean a machine used to compute data, then the first one was probably the abacus, and I don't think we know who invented it. Archaeologists discovered a device called the Antikythera mechanism, which they think is an ancient computer. The first modern computer was developed in 1939...

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Computers--If you mean a machine used to compute data, then the first one was probably the abacus, and I don't think we know who invented it. Archaeologists discovered a device called the Antikythera mechanism, which they think is an ancient computer. The first modern computer was developed in 1939 by Bulgarian American scientist John Atanasoff.

Record player--Thomas Edison invented the phonograph.

Camera--According to wikipedia, the first photograph was taken in 1826 by Joseph Niepce. However, during the Renaissance, artists like Leonardo da Vinci used a device called a camera obscura to project images onto paper. Many people are responsible for developing the camera as we know it today. See the history of the camera at wikipedia.

http://en.wikipedia.org/wiki/History_of_the_camera

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