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A suntanned arm showing browner skin where it has been exposed. This pattern of tanning is often called a farmer's tan . Sun tanning or simply tanning is the process whereby skin color is darkened or tanned. The process is most often a result of exposure to ultraviolet (UV) radiation from the sun or from artificial sources, such as a tanning bed , but can also be a result of windburn [ citation needed ] or reflected light. People who deliberately tan their skin by exposure to the sun engage in sun bathing , though there are also artificial tanning methods.
Sun tanning
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Ten Applications That Changed Computing
Cascading Style Sheets
Alan Mathison Turing , OBE , FRS ( pron.: / ˈ tj ʊər ɪ ŋ / TEWR -ing ; 23 June 1912 – 7 June 1954), was a British mathematician , logician , cryptanalyst , and computer scientist . He was highly influential in the development of computer science , giving a formalisation of the concepts of " algorithm " and " computation " with the Turing machine , which can be considered a model of a general purpose computer. [ 2 ] [ 3 ] [ 4 ] Turing is widely considered to be the father of computer science and artificial intelligence . [ 5 ] During World War II , Turing worked for the Government Code and Cypher School (GC&CS) at Bletchley Park , Britain's codebreaking centre.

