This is a 5081 graphical display. The 5080 raster-based line replaced the 3250 vector-based units, which had in turn replaced the 2250 family. All of these used a 32 key function keyboard as well as a regular keyboard. The 5080 generally used a tablet for cursor control whereas the earlier devices used a light pen. A light pen was available for the 5080 but generally not used. The new raster family was an improvement in that it offered color, although many people preferred the earlier units because they seemed faster and were built like trucks - you could really slam the function keys and not worry about breaking anything. Note the "dials" above the function keyboard - these were software readable and usually used for 3D rotations, zooming, and so on. Picture taken about 1985 in Chicago.