The document traces the development of early computers from ancient counting tools like the Chinese abacus and Napier Bones, a calculating system using carved bones, to mechanical calculating machines invented in the 17th century by Pascal and others that could perform basic arithmetic. It highlights Prof. Charles Babbages as inventing the first modern mechanical computers in the 1800s that could perform all basic mathematical calculations, cementing his role as the father of modern computers.

1. Computer-Stages of Development
Presented
by:
Amina
Rafique

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.

7. Thank you for
Watching