In laser cutting, a laser is used to cut materials. Typically this technique has been used for manufacturing applications in industries, but recently has also been used by schools, small businesses, and hobbyists. The technology being laser cutting lies in directing the output of a high-power laser, commonly with the use of optics and computer numerical control (CNC). The laser beam is focused on the material which leaves an edge with a high-quality surface finish. Industrial laser cutters can be used to cut structural and piping materials as well as flat-sheet material.