Computer stages of development

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. 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 .

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