VS11 Graphic System
From Computer History Wiki
The VS11 Graphic System was a raster display system for UNIBUS systems. It was composed of a QBUS VSV11 connected to the UNIBUS through a DW11.
It plugged into a Q/CD QBUS backplane; the standard one specified by the VS11 documentation is the DDV11-C.
It was originally produced by DEC's Computer Special Systems division.