The abacus also called a counting frame is a calculating tool used for performing arithmetic processes. The abacus was in use centuries before the adoption of the written modern numeral system and is still globally used by Merchant, Traders, and Accountant etc.
Abacus is a Latin word which has its origins from the Greek words abax or abakon which means table or a tablet. From the shape of an abacus, we can easily derive why it is called in such a way. In the olden days, people have used their hands and pebbles for counting and for larger numbers they have nominated twigs and bigger pebbles. In those days the calculations were made simple with the help of counting boards and abacus.
Even after the civilizations had progressed to numerals, decimals and the invention of zero; abacus followed them through their technology and inventions. The ease and fastness of calculation with abacus made it a very popular piece of mathematics. The concept of abacus was passed on to many generations and it had changed many forms from places to places. The Chinese had developed a newer version of abacus known as suan pan while the Japanese had converted it to another form known as soroban.