Robbins, Judd <br/><br/>Mastering DOS Judd Robbins.  -- 2nd ed.  -- Quezon City  Perfect Bound Pub.  1990 <br/>xxvii, 722 p.  20 cm. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>971519013 <br/><br/><label>Subjects--Topical Terms: </label><br/>Computer operating systems.<br/><br/><label>Dewey Class. No.: </label>GC 005.43 R534 1990