< 1. If the IBM 5150 XT computer came with documentation Yes, a hell of a lot more than current hardware does. < 2. Is an IBM monitor, model # 5153 (Personal Computer Color Display) is <compatible with an IBM 5150 XT? likely. < 3. What kind of monitor (graphics array) is an IBM 5153. I would guess <EGA, but don't know. That would be CGA. Pick up a copy (old one if possible) of the QUE publications _Upgrading and Repairing PCs. Most of the editions were very IBM centric and useful as reference. I keep a 3rd ed. for looking up connectors, drives and the like. You have better luck fining it in a library or used book shop than on the WWW. Allison