Systems documentation manual   
/ National Computing Centre 
 - 1973:   The National Computing Centre Limited,   1969 
<br/><br/><label>ISBN: </label>0-85012-101-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer 
<br/><br/><label>Subjects--Index Terms: </label>Standards  Communication 
<br/><br/><label>Universal Decimal Class. No.: </label>D 681.3.01:002(02)   / K9