Windows UI Evolution
I like to watch how Windows evolves. In this article you should be able to find out more about evolution of control panel applets in Windows:
Application compatibility wizard.
Wallpaper settings (Right click on desktop -> Properties)
New hardware wizard
Internet settings a.k.a. Internet Explorer settings
Internationall settings
Joystick setup. It is still here for older software.
Mouse settings. Interestingly, it's called mouse.cpl.

Network settings.


Telephony settings.
Time and date applet.
