1 янв 1975 г. - PLATO, a computer-assisted instruction system was in place at nearly 150 grammar schools, high schools, colleges and universities, and military installations.

By Jason Scott [CC BY-SA 3.0 us (http://creativecommons.org/licenses/by-sa/3.0/us/deed.en)], via Wikimedia Commons

18 сен 2017

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1 янв 1975 г.

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