Point of Sale, or most commonly known as POS, is a computer software used by salespersons to manage the selling process in any store. They are the equivalent of cash registers. They also generate receipts that you will need for checkout. You only need to have is a computer to run the software and a salesperson to operate it. Whether your store is a small one or a large scale store, you will need a POS. All you need to do is find a good distributor of cash register express that will cater with whatever you want in a software.