Omnibus boards

Well, now that my PDP-8/E is apparently working, but has no peripherals installed yet, my curiousity over what these 'mystery omnibus boards' do is increasing. If anyone can shed some light, i'm all ears: ---- Computer Operations Inc, C-10450-01. This board intrigues me the most, as someone has written this on the board with a marker: [LINK DEC TAPE 2] It has connectors for 3 ribbon cables to attach, 26 wires per cable. Connectors are labeled: CDJ2, CCJ1, CDJ1. ---- The remaining boards are from VG Data Systems. Someone here once mentioned they had information about some of these boards, and i'd like to know if any of these boards might be useful, or easily modified to be useful: PB-8E-101 PB-8E-102 PB-8E-202 on a standard DEC wirewrap board, should be able to make something out of it. PB-8E-504 2 of this board PB-8E-505 PB-8A-603 PB-8E-644 input connector has written: works as MS30, PDP8 [C:] -Lawrence LeMay