desktop calculators (1 янв 1930 г. – 1 янв 1960 г.)
Описание:
From the 1930’s to the 1960’s “desktop calculators” were
developed, making the transition from mechanical to electronic.
Добавлено на ленту времени:
Дата:
1 янв 1930 г.
1 янв 1960 г.
~ 30 years