X/OPEN portability guide 

 - Amsterdam :  Elsevier Science Publishers B. V.,  c1987 
 - 5 v. 
<br/><br/>v.1 XVS commands and utilities--v.2 XVS system calls and libraries--v.3 XVS supplementary definitions--v.4. Programming languages--v.5. Data management 
<br/><br/><label>ISBN: </label>0444701796 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMPATIBILIDAD DE SOFTWARE<br/>UNIX (Sistema Operativo de Computador)
<br/><br/><label>Dewey Class. No.: </label>005.43  / X1