When the human race started doing some trade, it felt a need for a calucating device. The first calculating device, which was used 2000 years ago was called ABACUS and the improvements in the calculating device in that age were slow.
By: ashok kumar!
- Created By
- School
- Address
- Class
- Mokkasda Kiran
- Madras Progressive Union Hr.Sec.School
- Tamil Nadu
- 8th