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13 mayo 1930 año - Overhead Projector

Descripción:

Initially used by the U.S military for training purposes in WWII, overhead projectors quickly spread to schools and other organizations around the country.

Añadido al timeline:

Educational Technology

ByDayanira Feliciano
14 nov 2017

fecha:

13 mayo 1930 año
Ahora mismo
~ 94 years ago

Fotos:

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