WALAI AutoLIB – RSSRSSWALAI AutoLibUnderstanding operating systems /Ida M. Flynn, Ann McIver McHoes.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00000056<img src="https://www.opac.sskru.ac.th/bookcover/56/56-fc-t.gif" align="left" height="150" width="120"/>520206An introduction to operating systems :concept and practice /Pramod Chandra P. Bhatt.http://www.opac.sskru.ac.th/opac/catalog/BibItem.aspx?BibID=b00000061<img src="https://www.opac.sskru.ac.th/bookcover/61/61-fc-t.gif" align="left" height="150" width="120"/>520206