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100
Abacus
the year is 100B.C~500B.C
The abacus also called a counting frame, is a calculating tool used primarily in parts of Asia for performing arithmetic processes -
Blaise Pascal
he lived in France.he was mathematics, philosopher.He invented operation calculator used the toothed wheel -
Gottfried Wilhelm Leibniz
He lived in Germany.He was philosopher, mathematics.
He solved math challenges to learn,improve -
Charles Babbage
He lived in London,England .He was inventor and mathematics. Chales Babbage is credited with inventing the modern computer. -
Augusta Ada Lovelace
She lived in London.she was splendid mathematics.
She is the programmer and she is founder of scientific calculation. -
Herman hollerith
He lived in USA.He was engineer and scientist.
He made IBM -
Vacuum tube
a vacuum tube, electron tube is a device controlling electric current through a vacuum in a sealed container. -
Tommy flowers
He lived England.he was engineer. -
Alan M. Turing
He lived in England. He was engineer.
He made automactic digital machine. -
Integrated circuit
An integrated circuit or monolithic integrated circuit is an electronic circuit manufactured by lithography, or the patterned diffusion of trace elements into the surface of a thin substrate of semiconductor material. -
Transistors
A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit. -
Steve Wozniak
he lives in USA.
He is Engineer and programmer -
Bill Gates
He lives in USA.
he is businessman.
he made windows -
4th generation Microprocessors
The computers were designed by using microprocessor, as thousands of integrated circuits were built onto a single silicon chip. -
mainframe and minicomputer
That development led to a scare for IBM, the original developer of the PC, as the world migrated to PCs and networks, diminishing the role of mainframes.
