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13 magg 1930 anni - Overhead Projector

Descrizione:

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

Aggiunto al nastro di tempo:

Educational Technology

ByDayanira Feliciano
14 nov 2017
0
0
435

Data:

13 magg 1930 anni
Adesso
~ 95 years ago

Immagini:

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