King, Val <br/><br/>
PC-DOS / 
Val King and Dick Waller 
 - iii, 60p. 
 - Operating systems guides .
 - Pitman pocket guides .
<br/><br/><label>ISBN: </label>0273021958 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers)<br/>PC DOS (Computer operating system)