A POS or point of sale generally means any location where a sale or transaction may take place. If you look at the bigger picture, a POS or point of sale can easily mean a mall, a market or a city because these are locations where something likely is going to get bought or sold.
The main Benefit of a computerized POS system over a cash box or a cash register is the sophisticated and detailed sales reports it provides.
If you operate a retail establishment or other business that handles cash or credit transactions, you probably have cash registers, credit card machines or point-of-sale (POS) machines installed to handle your transactions
A retail point of sale system typically includes a cash register (which in recent times comprises a computer, monitor, cash drawer, receipt printer, customer display and a barcode scanner) and the majority of retail POS systems also include a debit/credit card reader.