If anyone wants to play with UTS--the version I'm running has sources that
indicate it's pretty much a v7--you can connect to it at
https://mvsevm.fsf.net, resize your window so the terminal is 80x25, pick
option 11 (VM/370), hit enter, and then after the logo goes away type "DIAL
UTS".

The passwords are findable via a web search for something like "uts vm/370
password" in that I have not changed them from the defaults.  If you manage
to break out of UTS into VM, and from there into Hercules, and from that to
the physical host, and then from there compromise my network, I'd like to
know how you did it.  If on the other hand you're going to mine bitcoin
with my UTS VM guest, you can cost me literally dozens of cents a month in
electricity, probably.

I have not played with the 3270 libraries, but they exist.  The two
full-screen 3270 utilities I am aware of are ned and man.  Ned's really
rather a lovely little editor.  Other than that it feels a lot like a stock
v7, but of course the terminal is linemode.  The command to log out is
"logoff".

Adam