IEEE <br/><br/>
IEEE STANDARD: PORTABLE OPERATING SYSTEM INTERFACE FOR COMPUTER ENVIRONMENTS IEEE/ANSI STD 1003.1-19 

 - NEW YORK  IEEE  1988 
 -  317 
<br/><br/> SC-36 
<br/><br/><label>ISBN: </label>NCST  41 
<br/><br/><label>Dewey Class. No.: </label>616