I just got another box of OSI marketing lit. One of the items is a single sheet glossy with no date, but showing C1s C2s and C3s. Since there is no mention of anything else, I assume it's from 1977. Here's the kicker: It lists a Model 560Z CPU board with PDP-8 code compatibility! Has anyone on the list ever seen or heard of one of these? Thanks, Bill Sudbrink