...these OS/2 machines were once interconnected by a networking technology called 'token ring'.. no joke. It was basically an entire network where if one single node on the network misbehaved it would bring down the entire network - they didn't self recover either! you had to reboot them all. I remember once when I misconfigured a token ring card on a PC and it brought down the mainframe! It shut down the bank for 30 minutes"