What is counting boards?

Counting boards are an ancient form of calculating device that have been in use since the early development of civilization. They are also sometimes called abacus boards or counting frames.

A counting board is typically a rectangular or square board with grooves, or slots, carved into the surface. These slots are then filled with counters made of various materials like stones, shells, or beads.

The counters are then moved around on the board to represent numbers, or to perform calculations. For example, you can add or subtract numbers by moving the counters accordingly.

Counting boards were used for many centuries before the advent of modern calculators and computers. They were a central tool in early mathematics, and were used in a variety of settings, from schools to markets to government offices.

Counting boards are still used today for certain specialized purposes, such as in some educational settings, or as a visual aid for individuals with visual impairments. They are also sometimes used in religious ceremonies or as cultural artifacts.