File:Slideruleinuse.wpafb.chap2-2.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	19:09, 2 March 2006		250 × 198 (16 KB)	commons>ArnoldReinhold	An engineer using a w:slide rule, probably in 1950s. Note calculator in background. Source: Aeronautical Systems Center (ASC) History Office http://www.ascho.wpafb.af.mil/Genesis/chap2.htm

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