Executive programs and operating systems  

 - London:   Macdonald,  1970 
 - 116p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programs
<br/><br/><label>Subjects--Index Terms: </label>operating systems  
<br/><br/><label>Universal Decimal Class. No.: </label>D 681.3.06(08)  / L0