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200
The Abacus
The abacus is a counting frame that was the most early version of the calculator. It was used for addition, subtraction, etc, by sliding the beads up and down a rod. It was used in many different ancient countries and schools, such as Sumeria, Egypt, Persia, Greece, Rome, China, Japan, India, Korea, and Russia. It is even still used today, mainly used to teach Primary School children Place Value. This is because the Abacus is a very useful and simple teaching tool, that people can understand. -
Period: 200 to
Computer History
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The ENIAC
ENIAC was also made by mathematician Alan Turing. ENIAC used electricty. ENIAC was yet another calculator, and was designed to calculate useful problems in the war, such as the proximity of a bomb dropping, the range a bullet fires, etc. It filled a full room. ENIAC was completed shortly after WWII finished. It was not very good, as it ran on vaccum tubes which often burned out and had to be replaced. This left the ENIAC non functional for half the time it was supposed to be used. -
The Battery
The battery was created by a man named Alessandro Volta. Volta believed that energy was created by two different metals joined by a moist link. He proved this through experiments. Finally in the 1800's he created the first battery, known as the Voltaic Pile. It was made of pairs of piled up copper and zinc. The metals were seperated by cloth soaked in brine. This battery could produce a steady electric current. This battery was, however, not sold to market. -
The Difference Engine
The Difference Engine was a very big calculator. It was powered by a handle that you cranked around. The Difference Engine could calclate things even as complex as decimal sums. It was created by a man named Charles Babbage. He went on to design a better Difference Engine, but sadly ran out of money and became very unpopular. However, the public originally thought that the Difference Engine was wonderful, as it never made a mistake, unlike the men who were hired to do the calculations. -
The Telegraph
The telegraph is a communication device invented by Samuel Finley Breese Morse. One day, Morse was painting a picture of Lafayette. Suddenly, a horseback message arrived, telling Morse his wife had died. Morse went to see his wife's burial but the message was too late. Morse went to explore ways of fast, long distance communication. In 1832, Morse met Charles Thomas Jackson, knowledgable in electromagnetism. Morse then developed a single wire telegraph. It communicated using Morse Code. -
The Television
The television is a form of media, and entertainment. -
The Colossus
Colossus was used to quickly crack the Lorenz code, used by the Nazi in WWII. The code seemed impossible to crack, but this was solved by Tommy Flowers, a technician. He along with a mathematician named Alan Turing created Colossus Mark 1, a prototype that worked on 8th December 1943. Another Colossus was created, Colossus Mark 2. The creators of Colossus however, swore that they would not telll anyone of Collosus. The Collosi have been destroyed and are no more. -
The Atomic Bomb
The atomic bomb was dropped on the Japanese city of Nagasaki on the 9th of August 1945. -
The Mini Computer
The mini computer was a class of smaller computers. The picture here is the Data General One, one of the first minicomputers made. -
The Typewriter
The typewriter was an early typing device.
