When you create an inventory item, you can indicate if you want Oak Street to generate a unique UPC code for that inventory item. In that case, a UPC code number will be automatically generated for each new inventory item. (And, you can manually change this number if you wish). UPC numbers can also be created for existing items in your Inventory. This means that, when entering orders, you can now either type/select your normal Inventory item code, or you can use a barcode scanner (connected to our computer system) to scan in the UPC code. In either case, your regular Inventory item will appear on the screen as well as on the appropriate printouts. This is especially useful for taking orders at trade shows. And, when receiving merchandise for vendors, this would enable you to scan items in your Inventory to expedite the packing and shipping of orders. In addition, you can print UPC barcode labels for merchandise that you are shipping to your customer.