Sorry, folks. I've been asking around about what a System/74 is. I looked, and it's really a System/34. Could someone tell me what they were for, how much they were sold for, what year they are, what they're worth now, etc,etc. Thanks. By the way, I may be able to get my hands on those unidentified IBM network cards, maybe I can get a couple or two. I'll also look if I can find a hub for them. There are also some PS/2s (not for sale), which used to be attached to the network, which is now ethernet. The PS/2s, however, have a weird cable that looks like the monitor power cable. It has a box on the end, about 1" X 1", that has a ton of electrodes. What is that?