Help with your general information slides:

• General Information About Operating Systems (System Software)
  http://www.jegsworks.com/Lessons/lesson8/lesson8-1.htm
  
• Other General Info Notes

  
  

Help with the slides about your specific operating system:

• Windows Family Home Page
  http://www.microsoft.com/windows/default.mspx
  
• MacIntosh OS X
  http://www.apple.com/macosx/
  
• Linux Operating System
  http://www.linux.org/
  http://linux.com/