The History of Computers

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The History of Computers : 

The History of Computers

History of Computers : 

History of Computers Computers as we know them today have progressed greatly over thousands of years. From the first counting and adding machine to the use of paper memory, computers continue to grow with technology. Who knows what they will be like in another hundred years?

Humans : 

Humans The earliest form of counting was with fingers Other objects such as rocks or twigs were used to represent groups of numbers The idea of making mathematics easier was unheard of at the time

Abacus : 

Abacus The oldest known form of computing is the abacus The oldest surviving abacus was discovered in 300 B.C. Users moved beads to perform calculations; each column represented a different multiple of ten

Pascaline : 

Pascaline Blaise Pascal was the inventor of the first digital computer, called the Pascaline The Pascaline used hand-spun mechanical wheels to input numbers, then outputted them as the answer

Step Reckoner : 

Step Reckoner Gottfried Leibniz created the Step Reckoner as an improvement on Pascal’s machine

Punched Cards : 

Punched Cards Herman Hollerith created the first punched card machine in 1890, more than a hundred years ago! Machines used punched cards to read data and store for future use

Difference Engine : 

Difference Engine Charles Babbage’s Difference Engine was an mechanical calculator that operated automatically

ENIAC : 

ENIAC ENIAC (Electrical Numerical Integrator And Calculator) was made in 1942 as a means of calculating weapon trajectory in WWII This computer used vacuum tubes, and 1800 sq. ft. of space, and 180,000 watts of electricity to operate ENIAC is considered the first high-speed computer

Magnetic Core Memory : 

Magnetic Core Memory Al Wang created a system of storing computer memory on magnetic disks in 1949. The disks could be polarized one way or the other and store larger amounts of data.

Intel 4004 : 

Intel 4004 The Intel 4004, made in 1993, was the first microprocessor It held 2250 transistors (many of today’s household computers have over 400 million)

Graphical User Interface : 

Graphical User Interface Graphical User Interfaces were added in the 1980s to add an easier environment for the user Windows 1.0 in 1983 Windows Vista in 2007

Laptops : 

Laptops Laptops are simply portable computers The first laptop was introduced in 1983 Gavilan Computer, first laptop Standard laptop computer today

Sources : 

Sources www.seattlecentral.edu http://www.tcf.ua.edu/AZ/ITHistoryOutline.htm Meyers, Jeremy. A Short History of the Computer http://www.fact-index.com/m/ma/magnetic_core_memory.html Wikipedia.org

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