Hi, I'm not sure where to put this question but I recently got a big old heavy IBM machine. I don't think it's a computer, it might be a terminal. The number is IBM 5251. It is the "old" IBM logo-silver and black. It has a green monochrome screen and appears to work fine. My real question is what is this? I did a little searching, but did not really find anything. Also, I don't have a keyboard for it. The only connections are on the bottom of the machine. It looks like a serial port-type. Is there any way to use an XT or IBM 5-pin terminal keyboard on this machine? Thanks for your help!

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