I contracted at Nortel in the mid 1990's. In my cube I somehow acquired a Sun Sparcstation 20 that nobody was using, and found an NCD black-and-white (or was that one grayscale?) X terminal on a shelf somewhere, collecting dust. I found an image for it somewhere, and set it up to TFTP boot from the SS20 (which was running Red Hat Linux) to a login prompt (XDM). It was a nice little setup.