Larsen, Gwyne <br/><br/>First looak at... DOS Gwyne Larsen and Verlene Leeburg  -- New York  Mitchell McGraw Hill  1992 <br/>viii, 136 p.  23 cm. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>0070365857 <br/><br/><label>Subjects--Topical Terms: </label><br/>Computer operating system.<br/><br/><label>Dewey Class. No.: </label>GC 005.43 L32 1992