These devices are usually placed on a desk, counter or bench top (or they can be mounted on top of the bench top). Instead of using a single scan line, they project multiple lines at multiple angles which means that the operator does not need to ensure that the barcode is orientated in any particular direction. Omni-directional scanners are often used at supermarket and retail check-outs. These scanners can read linear barcodes such as EAN, Code128, Code39, etc
