The Abacus was originally the Chinese calculator used during the olden days in China. Business men would not do business without using the Abacus as they believed that by owning a brass Abacus would result in bringing in money and increasing their sales. If you hang an abacus over your shop door, it is believed to increase the amount of customers or if you prefer to place the abacus on the cash register, it will help to boost sales. If you have children in your family and they need encouragement with their maths etc., the abacus would be the ideal present to buy them. Placing the Abacus in the Northeast of the children's study room could help to increase their knowledge abilities especially maths.