The following are the files that display icons in the Control Panel.
The reside in the \WINDOWS\SYSTEM directory
They can be run individually by typing Control followed by the CPL file.
If you are missing any icons in the Control Panel, you want to make sure the CPL file is in the SYSTEM directory.

Access.cpl - Accessibility properties
Appwiz.cpl - Add/Remove Programs properties
Desk.cpl - Display properties
FindFast.cpl - FindFast (included with Microsoft Office for Windows 95)
Inetcpl.cpl - Internet properties
Intl.cpl - Regional Settings properties
Joy.cpl - Joystick properties
Main.cpl - Mouse properties
Mlcfg32.cpl - Microsoft Exchange Service properties
Mmsys.cpl - Multimedia properties
Modem.cpl - Modem properties
Netcpl.cpl - Network properties
Odbccp32.cpl - Data Sources (32-bit ODBC)
Password.cpl - Password properties
Sysdm.cpl - System properties
Themes.cpl - Desktop Themes (available with Microsoft Plus!)
TimeDate.cpl - Date/Time properties