I have a Windows keyboard. My computer is an IBM Aptiva, running at 200 Mhz. In the upper right corner of the keyboard are three keys: Print Screen (on top of key)/SysRq (on side of key), Scroll Lock, Pause (on top of key)/Break (on side of key). I know how to use Scroll lock, but not the other two. How does one cause the Print Screen key to work? What does the SysRq key do? What is the purpose of the Pause/Break key?