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they invented the roman numering that is not positional, and they used a counting frame to perform arithmic operations.
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they developed a large number of calculation methods, with the intention of streamlining them, based primarily on trial-error methods. -
they invented the zero, roman numering, and they invented the first counting frame: the abacus. -
he invented the algorithm. -
in 1545 he invented the negative numering. Until that point, mathematicians had believed that all numbers had to be greater than zero. -
he began to use letters to symbolize variables and this laid the foundations of algebra. -
invented logarithms (knowledge of numbers) -
laid the foundations for mathematical formulation. -
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. -
discovered analytical geometry -
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 -
he was the co-discover with Leibniz of the calculus. -
he built a device, known as
the Leibniz wheel. This device could automatically perform additions, subtractions, multiplications and divisions. -
she developed the first "programs" for the Babbage´s computers and laid the foundations for programming languages -
He proposed two computer machines moved by steam machines "The Difference Machine" and "The Analytical Machine". -
he managed in 1854 to build a highly specialized "differential" machine. It operated using punched cards containing series of operations and data. -
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). -
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. -
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. -
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 -
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 -
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 -
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 -
he created the first FORTRAN (FORmula
TRANslator) in 1954. -
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. -
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. -
In 1984 novelized the new world and coined the term "cyberspace"