Image:KayMcNultyAlyseSnyderSisStumpDifferentialAnalyzer.jpg
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current | 21:36, 15 November 2006 | 1,563×1,084 (213 KB) | German | ({{Information |Description=Kay McNulty, Alyse Snyder, and Sis Stump operate the differential analyzer in the basement of the Moore School of Electrical Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, circa 1942-1945. |Source=http://en) |