Have you ever been into a small shop and seen the cashier scanning your items into a neat little all-in-one till system? They look really cool with their computer screens. I found out recently that these technical electronical gadgets are called POS systems.
And you don’t need to run a shop to own one. There are many web sites on the internet that sell them and they are not sold at very expensive prices either. You could pick one up, brand new, for as little as $1600.