I&#x27;ve written barcode processing software specifically for the retail market. There is a wide array of barcodes that will be used in the retail grocery store. UPC-E, EAN-8, UPC-A, EAN-13, EAN-14, GS1, GTIN, CODE128, and PDF417 (for drivers license scanning or smart phone apps, e.g. Starbucks app barcodes).