There are three types of Unicomp 122 key keyboards out there.
I forget what Unicomp refers to them, but I personally differentiate them based on what scancode they send for F13.
If they send "F13" thats something that Windows will choke on, but linux can happily map to "F13" and you can do fun things with it.
If the keyboard sends "Shift + F1" then Windows will understand it, and so will linux, but hitting the key above F1 is programmatically the same as hitting the shift key and F1, and I can already do that.
Then there are some terminal keyboards that from what I understand pretty much cause your computer to burst into flames and melt into slag. So I don't know what those do, but it's bad.
These particular keyboards are of the "Shift + F1" variety, but feel light, hollow and kind of flex when you type on them. I once had one and sold it on craigslist.