As a WAG, I'd guess that it is a terminal board, that uses special cables that go to special boxes, at which point you can plug the terminals in. This guess is based on the number range of the Board ID, and the fact it sounds like the boards in a DECserver 550 (well they've 4 connectors). Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)aracnet.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |