4. NAPIER’S BONES
In 1617, John Napier invented a calculating device known as
Napier’s Bones.
This calculating device was specially used for multiplications.
6. THE PASCALINE
CALCULATOR
In 1642, Blaise Pascal, a French
mathematician, invented the Pascal
calculator. This device, also known
as the Pascaline . This device was
limited to addition & subtraction only.
8. ELECTRO-MECHANICAL COMPUTING
DEVICES
Diffe re nce Eng ine
In 1821, Charle s Babbag e , a
British mathematician professor,
invented the Diffe re nce Eng ine .
The machine had the capacity to
perform calculations.
10. ANALYTICAL
ENGINE
In, 1834, he invented another device
which was a programmable mechanical
calculator known as Analytical Engine.
All the modern computers are based on
the concept of Analytical Engine.
13. MARK 1
The first electronic computer
was invented by Ho ward
Aike n in 1930.
This computer had the
capacity to perform three
additions, one subraction and
one multiplication per second.