There are all sorts of proprietary systems running on old machines with Windows 3.11 at the university I used to work at, from the scoreboard in the football st

There are all sorts of proprietary systems running on old machines with Windows 3.11 at the university I used to work at, from the scoreboard in the football stadium to extremely expensive scanning electron microscopes. Also, there's a 7-year-old Solaris machine which hosts the entire administrative database, with no fallback.