OK, I put my little old PS/2 up on my bench and looked close with adequate
light. Its a 8525-036 by the front tag, Ps/2 model 25 286 by the badge
above the screen (which is color), on the back its just a 8525. There are
two slots, one which looks like a 10bt, the other still with a blank.
Nice description on the Canadian IBM site;
http://www.can.ibm.com/helpware/8525286.html
There is a hole in the back about the size of a 1/4 inch phone plug, and I
am wondering if that is for the "pointing" device, which is what?