http://www.sgi.com/products/appsdirectory.dir/SolutionIXTrackballs.html
(Silicon Surf Promotional CD, 01/1995)
Trackballs
Diamond XX and XL Trackballs
Omega Trackball
OPT-MOUSE II
OPT-MOUSE
The Spaceball 2003(tm)
http://www.sgi.com/products/appsdirectory.dir/SolutionIXTrackballs.html (Silicon Surf Promotional CD, 01/1995)