http://incolor.inebraska.com/bill_r/ibm_pga_graphics_adapter.htm
http://www.seasip.info/VintagePC/pgc.html
http://en.wikipedia.org/wiki/Professional_Graphics_Controller
Technically it could be considered the worlds first 3-D accelerator for the PC. Man I get wayyyy too bored at work.
F***in hugggggge