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The history of computing is longer than the history of computing hardware and modern computing technology and includes the history of methods intended for pen and paper or for chalk and slate, with or without the aid of tables.
Stephen White, A Brief History of Computing; The Computer History in time and space, Graphing Project, an attempt to build a graphical image of computer history, in particular operating systems. The Computer Revolution/Timeline at Wikibooks "File:Timeline.pdf - Engineering and Technology History Wiki" (PDF). ethw.org. 2012.
Computer History Museum; Computers: From the Past to the Present; The First "Computer Bug" at the Naval History and Heritage Command Photo Archives. Bitsavers, an effort to capture, salvage, and archive historical computer software and manuals from minicomputers and mainframes of the 1950s, 1960s, 1970s, and 1980s; Oral history interviews
A Brief History of Computing, by Stephen White. An excellent computer history site; the present article is a modified version of his timeline, used with permission. The Evolution of the Modern Computer (1934 to 1950): An Open Source Graphical History, article from Virtual Travelog
A computer is an automatic abacus. The type of number system affects the way it works. In the early 1950s, most computers were built for specific numerical processing tasks, and many machines used decimal numbers as their basic number system; that is, the mathematical functions of the machines worked in base-10 instead of base-2 as is common today.
The history of computing hardware spans the developments from early devices used for simple calculations to today's complex computers, encompassing advancements in both analog and digital technology. The first aids to computation were purely mechanical devices which required the operator to set up the initial values of an elementary arithmetic ...
History of Computing: A Chronology of the People and Machines That Made Computer History, rev. ed. Lexikon Services. ISBN 0-944601-26-X. Gunning, W.F. (1952). A Survey of Automatic Computers: Analog and Digital (PDF). Rand. Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia vol.1 Electromechanical Devices. Gille Associates.
J. Lyons, a United Kingdom food company, famous for its tea, made history by running the first business application on an electronic computer. A payroll system was run on Lyons Electronic Office (LEO) a computer system designed by Maurice Wilkes who had previously worked on EDSAC .