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Bell  Laboratories scientist George Stibitz uses relays for a demonstration adder
- he built it on his “Kitchen” table, this simple demonstration circuit provides proof of concept for applying Boolean logic to the design of computers
-That same year in Germany, engineer Konrad Zuse built his Z2 computer, using telephone company relays.

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The Complex Number Calculator (CNC) is completed
-In 1940, Stibitz demonstrated the CNC at an American Mathematical Society
-using a Teletype terminal connected via to New York over special telephone lines.

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First Computer to run on a computer
-First program, consisting of seventeen instructions and written by Kilburn, ran on June 21st, 1948.
-This was the first program in history to run on a digital, electronic, and stored-program computer.

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ERA 1101 introduced
-The design packed 800 vacuum tubes into a relatively compact 12 square feet.

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RCA introduces its Model 501 transistorized computer
-The 501 is built on a 'building block' concept which allows it to be highly flexible for many different uses.
-Could simultaneously control up to 63 tape drives very useful for large databases of information.
-Quick access to this huge storage.