this was taken from notebookforums dell faq
WSXGA= Wide-Aspect Super eXtended Graphics Array, this is the display @ 1680 x 1050.
WUXGA= Wide-Aspect Ultra eXtended Graphics Array, this is the display @ 1920 x 1200.
WXGA= Wide-Aspect eXtended Graphics Array, this is the display @ 1280 x 800.