Most of the computers and technology that were built in this era were built for specific purposes or functions, such as performing general calculations. They were created using gears, motors, vacuum tubes and utilized punch cards or paper tape for storage. Some of these systems supported limited forms of being programmable and the ability to store data.
The Mechanical/Electro-Mechanical computer age begins
1000BC First abacus is developed by Babylonians
1642 Blaise Pascal developed first mechanical calculator
1822 Charles Babbage started developing his mechanical calculator
1890 Herman Hollerith developed a punch card computer for US census
1936 Z1 Computer (Mechanical Calculator): first programmable computer, built by Konrad Zuse.
1939 Hewlett-Packard is Founded, by David Packard and Bill Hewlett.
1940 Complex Number Calculator
1941 Konrad Zuse finishes the Z3 computer, it uses 2,300 relays.
1942 ABC Computer (Atanasoff-Berry Computer), this was the first electronic computer. built by John Atanasoff & Clifford Berry.
1943 Project Whirlwind at Massachusetts Institute of Technology (MIT)
1944 Harvard Mark I (Mechanical/Relay): Built by Howard Aiken & Grace Hopper.
1944 The Colossus computer goes online at Bletchley Park.
1946 Plankalkül: First algorithmic programming language, created by Konrad Zuse.
1946 ENIAC 1 (Vacuum Tube), which was uilt by John Presper Eckert & John W. Mauchly
Computer Pioneers - Pioneer Computers Part 1
Video Description: "Computer pioneer Gordon Bell hosts this two-part program on the evolution of electronic computing from its pre-World War II origins through the development of the first commercial computers. His narration traces the development of the stored program computer architecture which remains the foundation of todays modern computers.
In Part 1 The builders of the first five computer machines: the Bell Labs Model 1, the Zuse Z1-3, the Atanasoff-Berry Computer, the Harvard Mark 1 and the IBM SSEC tell their stories."
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