Computer history 2 2010

600 BCE

500 BCE

633

1642

1671

1833

1847

1890

1920

1934-1939

1937

1939

0

2500 BCE

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2500 BCE

• The remote antecedent is the abacus, developed in China. It was the first instrument used by man to facilitate the operations of calculation.

600 BCE

• The astronomer, mathematician and philosopher Thales of Miletus Greek described some aspects of static electricity. In his writings from the word electron, which is used to denote negative particles of the atom.

500 BCE

• The Romans used abacus with pebbles, which they called estimates, which were displaced on a table with encrypted channels with their numbers (I, V, X, L, C, D, M).

633

• The Englishman William Oughtred created an instrument that is now known as slide rule, until recently used by engineers.

1642

• Frenchman Blaise Pascal (1623-1662) invented and built the first mechanical adding. The Pascaline was addition and subtraction. Worked through a series of counters with ten teeth wheel numbered 0 through 9. The father of Pascalera tax collector, so it was the first to use it.

1671

• The German philosopher and mathematician Gottfried Leibniz developed a machine gearbox.

1833• Professor of Mathematics at Cambridge University Charles Babbage (1792-1871)

invented the first machine information processing. Something like the first programmable mechanical computer. Although nearly forty years devoted to its construction, died without finishing his project. Babbage used punched cards to provide data to your machine had copied the idea of weaving the Frenchman Joseph Marie Jacquard, invented in 1801 - which would become the recorded instructions, something like the first programs. Expected to achieve print the information recorded results and re-enter for the machine to evaluate them and deduct what should be done later.

1847

• The British George Boole developed a new type of algebra (Boolean algebra) and began studying symbolic logic. In 1847 he published "The mathematical analysis of thought" and in 1854 "The laws of thought."”. His Algebra was a method to solve logic problems using binary values (1 and 0) and three operators: and (y), or (o) and not (not). By means of binary algebra, later developed what is now known as binary code, which is the language used by all computers.

1890

• The original punched cards and electrical equipment used to classify by sex, age and origin to the U.S. population. This machine of the census was provided by engineer Herman Hollerith, whose company later merged (1924) with a small company in New York, creating the International Business Machines (IBM), a company that a century later revolutionized the computer market with p personal or PC.

1920

• In 1920 presented in Paris on "Arithmometer electromechanical", which consisted of a calculator connected to a typewriter, you type in the numbers and operations. Once the calculation, the machine automatically delivered the result. This device was the first version of a digital computer

1934-1939

• Konrad Suze two machines built in Germany electromechanical calculation is pretty close to what would be the first computer. The Z1 had a keyboard and some lamps indicating binary values. The Z2 was an improved version using electromagnetism.

1937

• Claude Shannon showed that the programming of future computers was only a matter of arithmetic logic, recognizing the importance of Boolean algebra. He suggested that could be used as switch in telephone exchanges, an idea that would be essential to build the first computer.

1939

• In the United States, George Stibitz and S.B. Williams, Bell Labs, built a calculator automatic sequence that switches used ordinary telephone switching systems.