Mechanical/Electro-Mechanical Computer Age

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.