__________ invented an adding machine called Pascaline.

The third generation of computers were used in ________ period.

In 1617, John Napier invented a calculating device called _________

Second generation computers were used in __________ period.

In _________ generation, the used of transistors made computers smaller, faster and less expensive.

__________ Designed a machine called Analytical Engine.

A modern computer has. 

The working principles of today's computers were provided by an English mathematician. 

The working principles of today's computers were provided by an English mathematician. 

Abacus was the first calculating device invented in _________