As we noticed goods and products in the department store, supermarket, malls and any establishments that are into selling, there is bar code at the bottom or at the side. The bar code will tell the price and review of a products. It makes the job of the employee especially the person in charge in the adding machine. And person in-charge in the inventory. All they have to do is to point the barcode scanners at the bar code and they will get information of the products. Their inventory would be easy and fast using this gadgets. Also, when a customer buy items at the store, it is easy to add the amount purchased. No need to hit every keys in the adding machine because the bar code scanner will tell the prices of the purchased goods. Indeed this gadget is very essential in business.