The point of sale (POS) or point of purchase (POP) is the time and place where a retail transaction is completed. At the point of sale, the merchant would 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 a 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, but is increasingly being dispensed with or sent electronically.

To calculate the amount owed by a customer, the merchant may use any of a variety of aids available, such as:

RETAIL/SHOP SCALES Retail Scales or Shop Scales, as they are sometimes referred to, are weighing machines that are used to calculate a price based on weight. In the UK, and across the European Community, it is a legal requirement for anyone selling goods by weight to ensure the weighing scales they are using are fit for purpose.


BAR CODE SCANNERS Whenever there is a need to accurately identify or track something, bar-coding should be used. In a data entry work environment, workers may be required to enter data into a customer database system. Instead of manually typing into a database, if the information is contained in a barcode, a data entry operator may scan it in.


ELECTRONIC AND MANUAL CASH REGISTERS A cash register or EPOS system, which is either standalone or networked, is a business tool to record details of receipts for sales easily and accurately. Cash registers issue receipts and maintain details of each transaction either electronically or on a till roll.

To make a payment:

EFTPOS TERMINALS The EFTPOS is a compact payment terminal comprising the terminal, rechargeable battery and terminal power supply. The terminal also acts as a PIN pad for the customer and has an internal thermal printer for fast, quiet printing.


TOUCH SCREENS When most people think about a computer display, many may develop a mental picture of an output device. However a computer display can function as both an input device and an output device. A touch sensitive screen provides a computer user with an input interface that doesn’t require extensive computer skills or literacy.