Evaluation of computer- Abacus
Abacus
- @ Also known as Abacus / (counting frame ) #Wikipedia
- @The oldest known calculating Device is Abacus .
- @which was invented in Asia over 2000 Years ago .
- @The easiest widely used Mechanical calaculating Device
- @The abacus was used sumaraians, And Egyptian as early 2000BC
- @ Its use was widespread among the Romans ,Indians, Chinese, and Japanese
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