I saw this on the Internet today and thought it was too good not to share here as well.
The Blit (originally named the Jerq!) was an early graphical user interface, connected to a UNIX computer. Inspired by the Xerox Alto from the early 1970s, creators Rob Pike and Bart Locanthi wanted to make a graphics machine for use at Bell Labs that would have the usability of the Xerox, but with the processing power of a 1981 computer. Created using a Motorola microprocessor instead of a Bell one, the machine would be retooled for the commercial market (business market, because it was still expensive) as the AT&T 5620, which came out in 1984 — using a Western Electric WE32000 microprocessor. The Blit had a vertically-oriented display and an early mouse peripheral; this video explains how it worked.
Find out more at the [AT&T archives page](http://techchannel.att.com/play- video.cfm/2012/8/27/AT&T-Archives-BLIT-UNIX-GUI).