> From: Steven Malikoff > Would that be part of this system at a Japanese computer museum? ... > the 11/05 has 'Unichannel15' on it
Yes, the 3 bays in the center are a PDP-15. (The indicator panel at the top of the center bay is the one for the PDP-15 CPU; you can see it here: http://ana-3.lcs.mit.edu/~jnc/tech/DECIndicatorPanels.html at the top of the 'PDP-15' section.) The Unichannel 15: https://gunkies.org/wiki/UNICHANNEL_15_System is undoubtly there to drive the RK05; I don't think there's a native PDP-15 controller for that. > There is an 11/15 ??? Is that a typo for 'PDP-15'? The -11/15 looks just like an -11/20 https://www.ricomputermuseum.org/collections-gallery/equipment/dec-pdp-1115 except it only has 16 address switches, not 18 as on the /20. (The front panel shown there has an OEM-specific re-paint; I couldn't quickly turn up an image of a DEC /15 front panel.) Noel