Late 1960s - Early 1970s: Third Generation Computers One of the most important advances in the development of computer hardware in the late 1960s and early 1970s was the invention of the integrated circuit, a solid-state device containing hundreds of transistors, diodes, and resistors on a tiny silicon chip. It made possible the production of large-scale computers (mainframes) of higher operating speeds, capacity, and reliability at significantly lower costs. Another type of computer developed at the time was the minicomputer. It profited from the progresses in microelectronics and was considerably smaller than the standard mainframe, but, for instance, powerful enough to control the instruments of an entire scientific laboratory. Furthermore operating systems, that allowed machines to run many different programs at once with a central program that monitored and coordinated the computer's memory, attained widespread use.

TEXTBLOCK 1/2 // URL: http://world-information.org/wio/infostructure/100437611663/100438659498

0 - 1400 A.D. 150 A smoke signals network covers the Roman Empire The Roman smoke signals network consisted of towers within a visible range of each other and had a total length of about 4500 kilometers. It was used for military signaling. For a similar telegraph network in ancient Greece see Aeneas Tacitus' optical communication system. About 750 In Japan block printing is used for the first time. 868 In China the world's first dated book, the Diamond Sutra, is printed. 1041-1048 In China moveable types made from clay are invented. 1088 First European medieval university is established in Bologna. The first of the great medieval universities was established in Bologna. At the beginning universities predominantly offered a kind of do-it-yourself publishing service. Books still had to be copied by hand and were so rare that a copy of a widely desired book qualified for being invited to a university. Holding a lecture equaled to reading a book aloud, like a priest read from the Bible during services. Attending a lecture equaled to copy a lecture word by word, so that you had your own copy of a book, thus enabling you to hold a lecture, too. For further details see History of the Idea of a University, http://quarles.unbc.edu/ideas/net/history/history.html

TEXTBLOCK 2/2 // URL: http://world-information.org/wio/infostructure/100437611796/100438659702

CIA CIA's mission is to support the President, the National Security Council, and all officials who make and execute U.S. national security policy by: Providing accurate, comprehensive, and timely foreign intelligence on national security topics; Conducting counterintelligence activities, special activities, and other functions related to foreign intelligence and national security, as directed by the President. To accomplish its mission, the CIA engages in research, development, and deployment of high-leverage technology for intelligence purposes. As a separate agency, CIA serves as an independent source of analysis on topics of concern and works closely with the other organizations in the Intelligence Community to ensure that the intelligence consumer--whether Washington policymaker or battlefield commander--receives the adaequate intelligence information. http://www.cia.gov

INDEXCARD, 1/2

William Frederick Friedman Friedman is considered the father of U.S.-American cryptoanalysis - he also was the one to start using this term.

INDEXCARD, 2/2