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1 gen 1930 anni - Overhead Projector
Descrizione:
Beginning with military education, and then moving to the classroom, most American schools had overhead projectors by the end of 1930.
Aggiunto al nastro di tempo:
24 ott 2018
0
0
246
Tech timeline
Data:
1 gen 1930 anni
Adesso
~ 94 years ago