12 авг 1966 г. - Portable Calculators
Описание:
Portable calculators were invented in 1966 by Jerry D. Merryman, James H. Van Tassel and Jack St. Clair Kilby. It is very important because you can solve math problems. Also, you don't have to be at a certain place to do it, you can do it anywhere.Добавлено на ленту времени:
Дата:
12 авг 1966 г.
Сейчас
~ 59 г назад