2. Abacus
The mother of our modern computers
was probably Chinese abacus.
The early Chinese abacus was a
simple frame with six beaded strings.
3. Napier Bones
In early seventeenth century a
mathematician from Scotland invented an
advanced calculating system called the
Napier Bones.
This device was made from carved
bones, it could also multiply and divide.
4. The First Calculator
• In 1642 a French mathematician, Pascal,
invented the first mechanical calculating
machine which renamed “The Pascaline”
• This machine could add and subtract at very
high speed.
5. Arithmetic Replica
• This calculating machine was
invented in Germany by a German
mathematician.
• This machine was a modified
version of Pascaline.
• This machine could divide and
multiply as well as add and subtract.
6. The Analytical & Differential
computer
• The fast mechanical computer
was invented by Prof.Charles
Babbages.
• He is also known as father of
computers.
• Both his machines could
perform all arithmetical
calculations.
