A Nd:YAG laser-based microprocessor-controlled marking system has been developed for commercial use. It can mark a variety of metallic, semiconductor, plastic, and coated materials with letters, numbers, special symbols, and company logos. The alpha-numeric information is presented in a standard 5 by 7 dot matrix format, with continuously adjustable character height up to 7 mm. Programming features of the control system allow for either automatic or manual serializing, editing of messages during laser marking, "reverse-video" marking, among others. Depending upon the marked material or the required marking rate, either a CW pumped Q-Switched laser or a flash-pumped pulsed laser is used. Examples of marked materials are shown.