Modern Operating Systems
http://www.xun6.com/file/1c131c514/Modern+Operating+Systems.chm.html


Operating Systems Design and Implementation
http://www.xun6.com/file/2c2849e14/Operating+Systems+Design+and+Implementation.chm.html


How to Cheat at Windows System Administration Using Command Line Scripts
http://www.xun6.com/file/d71155214/How+to+Cheat+at+Windows+System+Administration+Using+Command+Line+Scripts.pdf.html


Windows Administration at the Command Line for Windows 2003, Windows XP, and Windows 2000
http://www.xun6.com/file/055d12614/Windows+Administration+at+the+Command+Line+for+Windows+2003%2C+Windows+XP%2C+and+Windows+2000.pdf.html


Mac OS X Advanced System Administration v10.5
http://www.xun6.com/file/4a12aaa14/Mac+OS+X+Advanced+System+Administration+v10.5.pdf.html


Getting Started with Your Mac and Mac OS X Tiger
http://www.xun6.com/file/8ceff0214/Getting+Started+with+Your+Mac+and+Mac+OS+X+Tiger.chm.html

Enjoy!