Editing concepts and procedures 

 - 2 
 - Estados Unidos de América : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1.SISTEMAS OPERATIVOS.
<br/><br/><label>LC Class. No.: </label>QA76 8 I25970 I35 
<br/><br/><label>Dewey Class. No.: </label>001.644 5 I13ae