It's a system, with DEC CPU, non-DEC controllers/peripherals and a non-DEC backplane/chassis/power supply. Not too unusual - IMHO it's *more* unusual to find an entirely-DEC system. Note that it is possible to assemble a brand-new PDP-11 "compatible" using no DEC parts at all. For instance, I know of one desktop system using a Mentec M11 CPU (totally custom implementation, not even a J11), Andromeda SCDC SCSI host adapter, Logical Company async multiplexer, and a Seagate SCSI hard drive in an Andromeda desktop Q-bus enclosure. Tim.