A barcode printer is a computer peripheral that prints labels and tags with barcode data. Barcodes are widely used to identify products in retail and shipping environments. They are particularly useful for labeling items with UPC or EAN codes. Listed below are a few types of barcode printers. Depending on your needs, you can choose an inkjet, thermal transfer, or piezoelectric printer. Regardless of which type of printer you choose, be sure to choose a quality one.