Those are OK security wise, OS/2 has very good built in paranoid security, and banks used it a lot. My local bank has ditched XP aside from in the Diebold ATM network and has gone to RHEL, so that they could keep all the old computers and get an upgrade without a hassle. All run a terminal client, and connect to a VM on the branch server, so they are a lot more secure, and have paranoid access control ( verisign football, password and swipe card needed to log on).