A Point of Sale (POS) is technically a system in a retail store from which you conduct the sale of physical goods. In a store, a POS is where the checkout happens, orders are processed and bills are paid.
The Software that runs on the POS System is what is usually referred to as the POS Software. Much like your laptops that run on Windows or Mac, or your phones that run on Android or iOS, a POS software serves as the terminal’s operating system.
In the POS software interface, you can input data about the products that you will sell, tally order costs and transact financially. The POS software helps you to process orders in a retail store with the help of available hardware.