POS systems and the technology behind it have revolutionized the retail business in almost all parts of the world. Today the POS system has become an integral part of the retail business and the changes are visible openly as well as behind the scenes. For the retailer this enables him to run his business with an effectiveness that would have been impossible just a few decades ago. The main benefits of a POS system are faster checkout times for customers, accurate billing, better inventory checking, and the easy introduction of loyalty schemes. This article will look at these points and some considerations needed to be taken into account when purchasing a POS system.