Thanks for your intro, and links to your Web site and vintage computers. I'll briefly make some comments (in my opinion) about the computers you have. But in general, if you do homework and identify the various cards and items in your computers, that info will tell you a lot about what you have and what you might do with it. "Homework" is my preference to "chat", speaking for myself. The IMSAI is filled with Cromemco cards, so essentially you have a Cromemco Z-80 S-100 system, with a 4FDC floppy controller. that 4FDC determines what you can do with that particular set of cards, and what you'll need to find to create a CP/M system around it. The PDP-8/e looks nice, and apparently you've powered it. Very old power supplies ought to have their caps "reconditioned", and you might check the DC ripple on both the 8 and the IMSAI to make sure the big caps are doing their job. http://www.retrotechnology.com/restore/8f_fixitmay13.html http://www.retrotechnology.com/restore/prob_solv.html A Web search will find more pages on my site, on S-100 or PDP-8s. There's lots of non-DEC cards in your 8; you might try to identify them by brand and model (ECRM?). You'll need (to identify) some kind of serial card, to talk to your 8. It would be convenient, to have an HTML document on your Web page which contains that information, linking to your photos. With that info on your Web page, others may find your 8 and cards, and contact you to your benefit. It would appear your 8 was an industrial controller, so those non-DEC cards ran something. The fun of 70's vintage computing, is to reverse-engineer items you don't have docs for - in my opinion. Chips and connectors, special function devices, connections back to the bus - those are clues as to function and operation. These days, the Web is informative. You'll find the PDP-8 world is very different from the S-100 world, a generational difference. Your post said you were not so interested in the industrial cabinets. The Vector Graphics motherboard, is in a commercial cabinet and is mounted in a commercial card cage; just as the 8-inch drives are mounted in a commercial cabinet. Neither cabinet was a product of Vector Graphics Inc; so the principle of vintage preservation would not be violated if you removed the drives or the chassis from those cabinets. But there is a decent card cage and it would be a challenge to replace that; maybe you'll find a smaller cabinet for it. Again, you have nice industrial cabinets; but such things are out of vogue these day - maybe some ham will need them for a base station or repeater. Modern folks are not fond of the old open-frame "brute force" S-100 power supplies, they use switchers, but my preference is to use traditional power supplies in S-100 systems. Beware that unregulated supplies like that 1) will run at higher-than-standard S-100 DC voltage if lightly loaded and 2) will retain most of their voltage for some time after power-down (I see bleeder resistors on your big caps). There's ways to deal with those issues, my S-100 Web pages talk about such things. All those statements are, of course, my opinions and views; you and others may think otherwise, or have other priorities, as can you. But the parts, caps and chips and such, function as designed and don't care about "opinions and priorities"; I hope my Web site represents the technology correctly. Good luck with the IMSAI/Cromemco and PDP-8/e. There's no shortage of Web pages where these are discussed and documented. And many people own either and will chat about them. What you do and how, is a matter of your time and interests and skills; you can learn a lot about the technology behind these systems, and/or meet others who have similar stuff. Herb Johnson retrotechnology.com -- Herbert R. Johnson, New Jersey USA http://www.retrotechnology.com OR .net