The point of sale (POS) is a machine which enables retail transaction. At the POS, the merchant can calculate the amount owed by the customer and indicate the amount, and may prepare an invoice for the customer (which may be a cash register printout), and indicate the options for the customer to make payment. It is also the point at which a customer makes a payment to the merchant in exchange for goods or after provision of a service. After receiving payment, the merchant may issue a receipt for the transaction, which is usually printed.
The POS Machine has the following components:
Touch Screen Monitor