I'm focusing on interfacing with a PDP-10. But it could be interesting to make a list of possible future additions. Which interfaces were there? - KA IMP: PDP-10 I/O bus. - DM IMP: PDP-10 I/O bus. Just one, made by Bob Metcalfe. - ACC LH/DH: Unibus. - DEC/CSS IMP11-A: Unibus. - CIMPSPIF: GE-645 GIOC. - ABSI: Honeywell 6180. - IBM? etc