1904
First broadcast talk
1918
Invention of the short-wave radio
1929
Invention of television in Germany and Russia
1941
Invention of microwave transmission
1946
Long-distance coaxial cable systems and mobile telephone services are introduced in the USA.
1957
First data transmissions over regular phone circuits.
At the beginning of the story of today's global data networks is the story of the development of
In 1955 President Eisenhower announced the USA's intention to launch a satellite. But it in the end it was the Soviet Union, which launched the first satellite in 1957: Sputnik I. After Sputnik's launch it became evident that the Cold War was also a race for leadership in the application of state-of-the-art technology to defense. As the US Department of Defense encouraged the formation of high-tech companies, it laid the ground to Silicon Valley, the hot spot of the world's computer industry.
The same year as the USA launched their first satellite - Explorer I - data was transmitted over regular phone circuits for the first time, thus laying the ground for today's global data networks.
Today's satellites may record weather data, scan the planet with powerful cameras, offer global positioning and monitoring services, and relay high-speed data transmissions. Yet up to now, most satellites are designed for military purposes such as reconnaissance.
1969
ARPAnet was the small network of individual computers connected by leased lines that marked the beginning of today's global data networks. An experimental network it mainly served the purpose of testing the feasibility of
In 1969 ARPANET went online and linked the first two computers, one located at the University of California, Los Angeles, the other at the Stanford Research Institute.
Yet ARPAnet did not become widely accepted before it was demonstrated in action to a public of computer experts at the First International Conference on Computers and Communication in Washington, D. C. in 1972.
Before it was decommissioned in 1990,
In the USA it was already in 1994 that commercial users outnumbered military and academic users.
Despite the rapid growth of the Net, most computers linked to it are still located in the United States.
1971
Invention of
1979
Introduction of
1992
Launch of the
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Copyright is not only about protecting the rights of creators, but has also become a major branch of industry with significant contributions to the global economy. According to the
In an age where knowledge and information become more and more important and with the advancement of new technologies, transmission systems and distribution channels a further increase in the production of
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Also called microcircuit, the integrated circuit is an assembly of electronic components, fabricated as a single unit, in which active semiconductor devices (
b. Nov. 2, 1815, Lincoln, Lincolnshire, England
d. Dec. 8, 1864, Ballintemple, County Cork, Ireland
English mathematician who helped establish modern symbolic logic and whose algebra of logic, now called Boolean algebra, is basic to the design of digital computer circuits. One of the first Englishmen to write on logic, Boole pointed out the analogy between the algebraic symbols and those that can represent logical forms and syllogisms, showing how the symbols of quantity can be separated from those of operation. With Boole in 1847 and 1854 began the algebra of logic, or what is now called Boolean algebra. It is basically two-valued in that it involves a subdivision of objects into separate classes, each with a given property. Different classes can then be treated as to the presence or absence of the same property.