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Communications Machine
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The Communications Machine, or "CM", is a mechanical device used by the United States Navy for most of the 1920s. It used a sliding alphabet system. It was developed by Agnes Meyer Driscoll and William Gresham. In 1937 the United States Congress recognized the achievement of these two by awarding them both $15,000.[1]
 | This article relies largely or entirely on a single source. (April 2024) |
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