A typical retail store keeps a full package of the products needed for cash registers and point of sale systems. For instance, this would most likely include a computer monitor, keyboard, receipt printer, computer hardware, cash drawer, bar code system, credit card swipe, point of sale software and whatever other devices you choose to give or take from the system. There are many optional devices that you can add to the system depending on how intricate you would like it to be. However, these products are some of the basic essentials needed to get the machines and software running.