Abacus and Calculator and are same to the extent that both are used for doing calculations. One learnt how to use, these can help you to do calculations really fast. - Neeraj Sharma
The very first calculator ever used could be an abicus, an electronic calculator, or even your brain. The first calculator invented was the abacus.
i am used to count some call this a manual calculator it's also called abacus
They used the abacus
The Chinese invention that was the first calculator was called an abacus. It was invented sometime between 2700 and 2300 BC.
If you mean electronically, then it would still be called a calculator. But, before that, people used the abacus, which had lots of sliding thingies and such.
An abacus is an ancient Chinese calculator that is still in use today.
the antonym for abacus is future calculator
Calculator.
The abacus.
the abacus
It is called an Abacus
an abacus
The abacus.
abacus
The calculator.
Abacus
The abacus, a calculator before calculators.