History of personal computers — This article covers the history of the personal computer. A personal computer is one which is directly used by an individual, as opposed to a mainframe in which the end user s requests are filtered through an operating staff, or a time sharing… … Wikipedia
History of Hamilton, Ontario — From the beginning, what is now Hamilton has benefited from its geographical proximity to major land and water transportation routes along the Niagara Peninsula and Lake Ontario. Its strategic importance has created, by Canadian standards, a rich … Wikipedia
motion picture, history of the — Introduction history of the medium from the 19th century to the present. Early years, 1830–1910 Origins The illusion of motion pictures is based on the optical phenomena known as persistence of vision and the phi phenomenon. The first … Universalium
Joseph Pomeroy Widney — (December 26, 1841 mdash; July 4, 1938) was a polymathic pioneer American physician, medical topographer, scholar educator, clergyman, entrepreneur philanthropist, proto environmentalist, prohibitionist, philosopher of religion, controversial… … Wikipedia
List of United States inventions — 1700s1731 Sextant * The sextant is an astronomical instrument that is used to determine latitude for navigation. It does this by measuring angular distances, like the altitude of the sun, moon and stars. The sextant was invented independently in… … Wikipedia