Point of Sale is commonly used in retail businesses through out the world. It is used to help exchange goods and services for currency. It effectively replaces simple cash register systems with a sophisticated yet simple interface.
At it's core, everything is recorded by a computer, or PC. You input information into the PC about the product you are selling. Depending on what the computer is told to do, it can calculate total, tac, change, evne quantities available. Every record is systematically recorded in a database. It tracks every facet of every transaction that occurs.
Since you have all this information recorded, the computer can help automate all of your vital information. You can organize your data in a large variety of ways to make informed decisions about your next business move.
A common misconception is that business owners think that POS is just a simple inventory tracking system, and that one point of sale system is like any other. Nothing could be further from the truth. Point of sale can be tailored to your niche, complete with custom modules that are geared to the problems and functions that are unique to your business. What works for one type of business won't work for another.