1980s & 1990s - HP and TI, the leading calculator manufacturers, compete and 1-up each other constantly with new functions and abilities for their calculators. (1 янв 1980 г. – 31 дек 2000 г.)
Добавлено на ленту времени:
Дата:
1 янв 1980 г.
31 дек 2000 г.
~ 21 years