Barcode scanner is a device which is designed for reading applied to the surface or a package of goods bar code and its subsequent transfer to the cash registers, computers or POS-terminals. On the basis of a number of features stand there are various models of barcode scanners. Depending on the type of scanning element (light) they may be laser (single or multipath) LED and require no backlight. In addition, barcode scanners may be combined, stationary or hand-held. At different trading enterprises scanners may be integrated directly into the cash units. Barcode scanners can also vary in such characteristics as the resolution and reading speed. For hand-held models are not less important indicators are the allowable distance to the scanner and the position of the bar code related to scanner.