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Period: 900 BCE to
History of computers
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850 BCE
Romans (900-800 b.C.)
they invented the roman numering that is not positional, and they used a counting frame to perform arithmic operations.
I V X C -
600 BCE
Greek, Babylonian or Egyptian civilizations(600-300 DC)
they developed a large number of calculation methods, with the intention of streamlining them, based primarily on trial-error methods. -
500 BCE
Hindus, Arabs and Italian
they invented the zero, roman numering, and they invented the first counting frame: the abacus. -
780
Abu Ja'far Mohammed ibn Musa al-Khowarizmi( 780-850)
he invented the algorithm. -
1545
Geronimo Cardano (1501–1575)
in 1545 he invented the negative numering. Until that point, mathematicians had believed that all numbers had to be greater than zero. -
1580
Francois Viete (1540–1603)
he began to use letters to symbolize variables and this laid the foundations of algebra. -
John Napier(1550–1616)
invented logarithms (knowledge of numbers) -
Galileo(1563-1642)
laid the foundations for mathematical formulation. -
Wilhelm Schickard (1592-1635)
In 1623 he designed and built what is considered the first digital calculator. Schickard's calculator allowed automatic additions and subtractions, and partially automated, multiplications and divisions. -
René Descartes(1596–1650)
discovered analytical geometry -
Blaise Pascal (1623–1662)
who is generally regarded as the inventor of the calculator,less advanced than Schickard. It was based on a toothed wheel system and given his own technology of the time,failed to manufacture any reliable models -
Isaac Newton (1643-1727)
he was the co-discover with Leibniz of the calculus. -
Gottfried Wilhelm Leibniz (1623–1662)
he built a device, known as
the Leibniz wheel. This device could automatically perform additions, subtractions, multiplications and divisions. -
Ada Byron(1815-1852)
she developed the first "programs" for the Babbage´s computers and laid the foundations for programming languages -
Charles Babbage(1791–1871)
He proposed two computer machines moved by steam machines "The Difference Machine" and "The Analytical Machine". -
Pehr George Scheutz(1785-1873)
he managed in 1854 to build a highly specialized "differential" machine. It operated using punched cards containing series of operations and data. -
Georges Boole (1815– 1864)
He established for the process of reasoning a symbolic representation. To do this he used variables that could only adopt two values "1" (true) and "0" (false). -
Herman Hollerith(1860-1929)
he created a punch card technology that was used to control the census. This technology proved to be faster and allowed more questions to be asked in the census questionnaire, thus obtaining more useful information. -
John V. Atanasoff(1903-1995)
he found an efficient method to solve systems of linear equations. The ABC (Atanasoff Berry Computer) was built in 1940, used binary arithmetic and was single-purpose. -
Clifford E. Berry. Atanasoff's (1918-1963)
main interest was to find an efficient method to solve systems of linear equations. The ABC (Atanasoff Berry Computer) was built in 1940, used binary arithmetic and was single-purpose -
Howard T. Aiken (1900-1973)
he designed and built, in 1944, an electromechanical machine named Mark 1, it was capable of multiplying two numbers in six seconds and dividing them by twelve -
John von Neumann (1903-1957)
he combined two old interests :the systematization of logic and the possibility of performing calculations quickly and reliably to create the design of a computer in -
John Mauchly(1907-1980)
the designer of ENIAC, the first large-scale digital computer. ENIAC was designed between late 1943 and early 1944 and was completed in late 1945 -
John Backus (1969-actuality)
he created the first FORTRAN (FORmula
TRANslator) in 1954. -
J.C.R. Licklider(1915-1990)
in 1962 Licklider wrote an essay on the concept of the Intergalactic Network, where the whole world is interconnected and can access programs and data from anywhere on the planet. -
Vinton Cerf (1943-nowadays)
In 1973 began the development of the protocol that would later be called TCP / IP, a protocol aimed at communicating some networks over others, the Internet Protocol or IP. -
William Gibson (1948-nowadays)
In 1984 novelized the new world and coined the term "cyberspace"