Open University M252 <br/><br/>
Computing and computers course : videotape 8. File hierarchies and reorganisation  [VHS Tapes]. 
Open University. 
 - Milton Keynes  Open University  1983 
<br/><br/><label>ISBN: </label> 0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>British airways -- Reservation system.<br/>Computers.<br/>Electronic data processing -- Reservation system.
<br/><br/><label>Dewey Class. No.: </label>QA/76.9  / OPE