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The ABC.
Build by John Atanasoft and Clifford Berry. This computer used vacuum tubes which where more reliable and efficient then relays. It was purely digital and use binary math and Boolean logic (true or false), which helped it solve up to 29 equations at a time. -
The Colossus
Invented Alan Turing, this computer was use to assist in breaking German Crypto Code. This was the first fully programmable computer which is a huge break thru for all computers -
Harvard Mark I
Howard Aiken in collaboration with IBM created the Harvard Mark I which was a calculating machine. It had over 1 million parts and weighed 5 tons. It was capable of doing multiple calculations a second. -
The Z4
The Z4 was invented by a German engineer by the name Konrad Zuse. This was the first commercial digital computer, and this is why he is considered the inventor of the modern day computer. He used Punch cards to encode information in binary. -
The ENIAC
Invented by John Mauchly and J. Presper Eckert, The Electrical numeric integrator and computer. this had 18,000 vacuum tubes and was the first successful high speed electronic digital computer. This computer was kind of programmable, but this was very difficult
