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John Napier
John Napier invented logerithms. Logerithms were used to look up the solution to a mathematical calculation. -
Blaise Pascal (Pascaline)
Blaise Pascal invented the Pascaline. He worked on it between 1642 and 1645. It was the first digital calculator. On the face of the machine has dials on it which you rotate to make it add and subtract. -
Stepped Reckoner
The Stepped Reckoner was invented by Gottfried Wilhelm von Leibnitez. This machine could add, subtract, multiply, and divide. -
Jacquards Loom (punched cards)
Joseph-Marie Jacquard was a weaver. Jacquard had knowledge about music boxes and pianolas. Since pianos played by punched paper tape, he decided that he wanted to use punch cards to control his looms. -
Lady Augusta Ada Countess of Lovelace
Lady Augusta was a great mathematician that helped Charles Babbage with all of his work. She also wrote some programs to be run on Babbage's machines. This is why she is known as the first compuer programmer. -
Herman Hollerith's Elctronic Tabulating Machine
Herman Hollerith desingned and built the Census Calculating Machine. He had his own company called the Tabulating Machine Company. -
Vacuum Tubes (1st generation of computrs)
The vacuum tubes were invented ne Lee de Forest. First generation compuers used vacuum tubes. -
Konrad Zuse
Konrad Zuse invented the first electrical binary programable computer in 1936. -
The Atanasoff-Berry Computer (ABC)
The ABC was a digital computer. It was the first digital computer which was invented by John Vincent Atanasoff and Clifford Berry. -
Harvard's Mark I
IMB's Automatic Sequence Controlled Calculator was invented in 1944. The computer had switches. They flipped back aand forth to display mathematical data. -
ENIAC
The ENIAC was invented by John Presper Ekert and John Mauchly. The ENIAC has a little more computing power than a modern calculator. -
Transistor (2nd generation of computers)
The transistor was invented by William Shockley. -
Dr. Grace Muarray Hopper
Dr. Grace Muarray Hopper discovered the first computer bug. A program that she was running gave the incorrect results and she then discovered that it was a computer bug. -
Integrated Circuit (3rd generation og computers)
The integrated circuit was invented by John Bardean, Walter Barttain, and William Shockley. -
Microprocessor
The Microprocessor was invented by M.E. "Ted" Hoff. -
Microsoft Corporation
Bill Gates invented Microsoft Corporation. -
Charles Babbage (Difference and Analytical Engines)
Charles Babbage had very impressive designs for the Difference and Analytical engines. That's what made him the "Father of Computers." Babbage drew up blueprints for the Difference engine but it never got finished. In thwe 19th century is wehn the Analytical engine was built. They had much in common with modern day computers. -
Abucus
The abucus is an ancient calculator machine. It can help you add and subtract. You move the beads up and down to add and subtract.
