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Jan 1, 1550
John Napier
He invented logarithms which use look-up to find the answer to error-prone math problems. -
Blaise Pascal (Pascaline)
Blaise Pascal was a mathmatician who worked on calculus. The pascaline didn't work because of unreliable mechanical parts. -
Slide Rule
It works on the basics from logarithms. -
Stepped Reckoner
The stepped reckoner was built by Gotfried Willhelm. He loved the binary system so he used it to control the machine. -
Jaquard's Loom
Built a model for the modern computer. He used punched cards to put information in the machine. -
Charles Babbage
Babbage tried to make a calculating machine, but to try to make sure he made no mistakes he had the figures done twice. He was also considered the Father of Computers. -
Lady Augusta Ada Countess of Lovelace
She was the first computer programmer. -
Herman Hollerith's Electronic Tabulating Machine
He made a card sorter with a charged pin that made it work by going through holes in punched cards. -
Dr. Grace Murray Hopper
She was a mathmatician who attended Yale and taught math at Vasser.She worked at Harvard on the Mark l. -
Konrad Zuse
He needed a completly different approach to make the computer. He made his machine out of relays.They used the binary system to turn it off and on. -
Alan Turing
Alan basically started modern electronic digital computing. His machine used a stream of 1s and 0s or as we call it the binary system. -
Atanasoff-Berry Computer (ABC)
It was an early special purpose electronic computer that may have been built by Vincent Atanasoff. -
UNIVAC
It was a very expensive computer back in 1968 when it costed $1,801,035 and now it costs about the same as an average calculator. -
Harvard's Mark l
Howard Aiken began to build like Charles Babbage. He made the hardware almost the same as Babbage's hardware. Aiken started with the Mark l and got to the Mark lV. -
Transistor
They are built into computer chips. It also switches an electric current off and on in a computer. -
Vacuum tube
A valve controlled the electronic current going through it. -
Intergrated circut
Componets are connected to make it work and it has transistors. -
Microprocessor
Transistors are built into microprocessors. It is also about the size of a postage stamp. -
ENIAC
It was a good calculating important computer.
