Old cash register machine

The cash register or cash register machine is a mechanical or electronic device for calculating and collecting sales transactions and with a cash drawer to store money in it. In addition, he also prints proof of payment to customers. The cash register is operated by the cashier at a point of sale.

In most cases, the cash drawer can only be opened after the transaction is executed, except using a special key that is only held by the manager or shopkeeper. The drawer must be locked to avoid the contents of the money not stolen by workers who do not make transactions and take the money, when a customer finished shopping does not require proof of purchase and immediately took the change back. In fact, at its creation, the checkout machine was used for the purpose of removing the theft of money by its employees by the term Incorruptible Cashier. At that time, it was said that the odd price determination was held because by imposing an odd number of prices like 49 or 99 cents, a cashier had to open a cash register to hand over the change and complete the transaction.

The cash register usually has a key labeled component "NS", which means "No Sale", and serves as a drawer opening. Some cashiers must also be opened with a special key or password.
If a transaction occurs, a registered transaction makes the previously closed cash drawer open, and the cashier can directly enter the money and retrieve the change from the drawer. In some countries, legislation regulates cashier machine users to immediately retrieve all receipts of payments recorded on the machine each will leave the store, also to check sales records so as to take sales tax.

The cash register machine is also connected to the weigher tool, bar code reader, point of sale, and credit card and debit card reader. Today, more and more cash register machines are being replaced with multipurpose computers with point of sale software.

Currently, the cashier is equipped with a bar code reader for each item, reads the sale price of the database, calculates the sales discount, calculates the sales tax or value added tax, records the inventory, the date and time of the transaction, draws the purchased goods, record payment methods, store sales amounts for each sale item and for a certain period, and various other tasks. The sales terminal also records the name of the cashier in charge and various sales offer information.

Currently, most cash register machines consist of individual computers with MS-DOS, Windows or Unix operating systems. Many cashiers also equipped with touch screen. The machines can be connected to a point of sale network using each protocol. These systems can be reached remotely for the purpose of obtaining sales records and enclosed issues.