Hello, all: I bought a STDBUS instrumentation computer off of eBay last week for $9, and it has some interesting boards in it. Unfortunately, the boards are mostly older Pro-Log models and information is sparse. I've made contact with the "legacy" manufacturer who wants $50 per manual for two of the boards. I found information for two of them on VersaLogic's Web site. So, here's the list of boards. If any one has original Pro-Log manuals for these that they can copy and send me, please contact me off-list. Pro-Log# Description 7303 DSKY (Display/keyboard module) 7502 Relay output module (8 relays) 7605 Programmable I/O 7806-1 Z80 CPU card (I have copy of VersaLogic's manual) Other P-L boards from another system I have: Pro-Log# Description 7805-1 8085 CPU card 7604A 64-bit digital I/O (I have copy of VersaLogic's manual) Thanks again for any help. Rich