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- Charles Babbage in 1840s, but he never built it.
- First electronic computer built was Atanasoff-Berry Computer in 1942, but it wasn't programmable and was never patented.
- First programmable computer was Harvard Mark I, designed by Howard Aiken, built by IBM in 1942, but it wasn't electronic.
- First electronic programmable computer was ENIAC, designed by Eckert & Mauchly, built in 1945, but programming was cumbersome as it involved manually rewiring the connections between the 40 modules of the machine as well as setting manually roughly 1000 switches.
- First modern type electronic programmable computer that stored instructions and data in the same memory was the british EDSAC in 1948. Soon followed by the US EDVAC in 1949.
Note: all above are digital computers, I am ignoring analog computers.
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When the first computer was invented not a calculating device and who invented it?
first computer was invented by Chals Babeje. It invented in 1938
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