A barcode printer is a computer peripheral for printing barcode labels or tags that can be attached to physical objects. Barcode printer is commonly used to label cartons before shipment, or to label retail items with UPCs or EANs. The most common barcode printers employ one of two different printing technologies. Direct thermal printers use a printhead to generate heat that causes a chemical reaction in specially designed paper that turns the paper black. Thermal transfer printers also use heat, but instead of reacting the paper, the heat melts a waxy or resin substance on a ribbon that runs over the label or tag material.

A barcode scanner is a computer peripheral for reading barcodes printed on various surfaces. It generally consists of a light source, lens and a photo conductor translating optical impulses into electrical ones. It contains decoder circuitry analyzing the barcode's image data provided by the photo conductor and sending the barcode's content to the scanner's output port.

Bare conductor is a conductor, which is used for overhead energy transmission and distribution lines. A wide selection of alloys and constructions allow for obtaining the best mechanical resistance and current-capacity for a particular application.