Basic principles Computer controls marking-needle to move on traces of pre-edited characters and graphs, meanwhile, to strike materials at a high frequency under the application of compressed air, thereby, to form needed characters and graphs. Major functions Software applicable on windows 98/2000/xp/vista platform, has strong editing functions, and easy to use. It could mark chinese and english characters, arabic numbers and graphs, automatic marking serial numbers, international standard vin codes. It could be easily move around and marking on un-movable parts through 5 meter long cable.