On: Ask HN: Who's still keeping a DOS machine up because the business depends on it?

[sejje]

A neighboring warehouse/supply place has an old system of some kind, I think DOS.

Old monochrome screens, and one of those printers you can hear ripping off every line, and it has the perforated sides for feeding that you rip off.

I haven't been over there in a while, but someone brought me back a receipt yesterday and it was printed like a modern invoice. I guess they updated.