The point of sale (POS) or point of purchase (POP) is the time and place where a retail transaction is completed. It is the point at which a customer makes a payment to the merchant in exchange for goods or after provision of a service. At the point of sale, the merchant would prepare an invoice for the customer (which may be a cash register printout) or otherwise calculate the amount owed by the customer and provide options for the customer to make payment. After receiving payment, the merchant will also normally issue a receipt for the transaction. Usually the receipt is printed, but it is increasingly being dispensed electronically.
The POS in various retail situations would use customized hardware and software tailored to their particular requirements. Retailers may utilize weighing scales, scanners, electronic and manual cash registers, EFTPOS terminals, touch screens and a variety of other hardware and software available. For example, a grocery or candy store may use a scale at the point of sale, while a bar and restaurant may use software to customize the item or service sold when a customer has a meal or drink request.
Businesses are increasingly adopting POS systems and one of the most obvious and compelling reasons is that a POS system does away with the need for price tags. Selling prices are linked to the product code of an item when adding stock, so the cashier merely needs to scan this code to process a sale. If there is a price change, this can also be easily done through the inventory window. Other advantages include ability to implement various types of discounts, a loyalty scheme for customers and more efficient stock control.