In article <CAPULOao-XDVvEFktPZfyuC0ns3wOgWG6a8FXLbwSWt6DRmzZLA at mail.gmail.com>, Harald Lapp <harald.lapp at gmail.com> writes: I collect everything I can find out about terminals on the terminals wiki: The Terminals Wiki <http://terminals.classiccmp.org> That includes links to documentation. I also try to incorporate any documentation I find into manx: <http://manx.classiccmp.org> When Tektronix started making the X terminals, they did some odd things with the model numbers. Sometimes they put a model number on the base that was different from what was listed in the catalog because the catalog item was: base + monitor + keyboard + mouse. Different configurations of monitor and memory in the base would be listed as a different model number, even though they reused the same base hardware. They also used a variety of letter suffixes. So it's hard to come up with a canonical list of model numbers because of the way they did mix and match on stuff. What you have above is probably a variant of one of the XP3xx models listed here: <http://terminals.classiccmp.org/wiki/index.php/Category:Tektronix> -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://ComputerGraphicsMuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://LegalizeAdulthood.wordpress.com>