Analogic by Data Precision in 1988 the model 6100 cost $7995. plus $6495. for the model 630 which is a 12 bit, 2 channel A/D input module. That's a lotta dough for something with so many buttons, not at all sure what it can do, or how to operate it. I actually had two of these model 6100's but had to downsize, so I tossed the nonworking 6100 back in 2012. I did keep the possibly functional input module, which I think was a 16 bit / 4 channel A/D unit the model 650, - which cost $12,800. way back when. I can't recall where these "half a ton" monsters came from or how I got them into my living room, but the books would be ever so much appreciated, paper or .PDF form.
Steven