Abacus has a long history and therefore experienced many changes during its lifetime. Originally born in China, but very fast spread all over the world. During these migrations it was natural to change its original form. We present several different abacus devices, from simple wooden abacus to very creative abacus devices integrated with today's calculator. Have a look on several abacus samples below, where most of them are Chinese Abacus Devices. If you have a picture of an abacus device we would like to put it on the web, simply send us an email to info@abacus.ca, and we will post it here.