Global Digital Security Surveillance and control systems of state agencies, private and military institutions exist around the globe. World-Information.Org provides in depth information on the major surveillance systems such as ECHELON and an analysis of their political, geographical, technical and organizational status. Moreover the status quo in the development and usage of digital identification and tracking technology and the evolution and utilization of cryptography is investigated. Related search: Global Digital Security

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Calculator Calculators are machines for automatically performing arithmetical operations and certain mathematical functions. Modern calculators are descendants of a digital arithmetic machine devised by Blaise Pascal in 1642. Later in the 17th century, Gottfried Wilhelm von Leibniz created a more advanced machine, and, especially in the late 19th century, inventors produced calculating machines that were smaller and smaller and less and less laborious to use.

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