trusted - used by pcmcia-cs to see if a regular user can add and remove pcmcia cards
voodoo3 - Adds support for 3Dfx's Voodoo3 video chipset, else defaults to Voodoo4/5 support if not in USE.
wavelan - Tells pcmcia-cs that you want to use the built-in wvlan drivers instead of the Orinoco drivers
+wmf - Adds support for the wmf vector image format
X - Adds support for XFree86
xface - Adds xface support -- only in use for sylpheed and sylpheed-claws
xml - Check/Support flag for XML library (version 1)