First steps unit 1 introduction 

 - Walton  Open university  1988 
 - 32p.  27cm 
<br/><br/><label>ISBN: </label>0335143156 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data processing<br/>Computer science
<br/><br/><label>Dewey Class. No.: </label>004  / OPE