File:Bell-relay1 100 .jpeg .jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:40, 19 May 2010 | 800 × 624 (112 KB) | Davidboslaugh (talk | contribs) | Bell Labs relay calculator in operation at the Army Ballistic Research Laboratory. U.S. Army photo | |
19:33, 6 May 2010 | 800 × 624 (112 KB) | Davidboslaugh (talk | contribs) |
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