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1 янв 1950 г. - LCD PROJECTOR

Описание:

It got its start pre-WWII, when the Army used it for training soliders. Then, the police got interested, because it made identifying suspects easier. You could project images across a screen. By the late 1950s and early 1960s, overhead projectors made it into schools, and the interactive classroom was born.

Добавлено на ленту времени:

17 дек 2018
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0
737

Дата:

1 янв 1950 г.
Сейчас
~ 75 г назад

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