I used to work for an electrical contracting company. My job was to be the assistant to both the accounting department and the human resources department. From time to time, I would assist the purchasing department with anything they might need, including generating purchase orders for electrical parts. Instead of doing inventory the old way (hand counting items and recording them in the computer or on paper — depending on what you consider to be “the old way”), they purchased one of the many POS systems available on the market. Then, all they had to do was scan in their items and it automatically recorded the item and quantity in the system. It saved a bunch of time for sure!