Iirc literally the nuclear launch systems? I’ll see if I can find the article.
Edit: not anymore, but as recent as about 2019ish. Can’t imagine they’re the only ancient infrastructure still using this level of technology though. https://www.nytimes.com/2019/10/24/us/nuclear-weapons-floppy-disks.html
I know you’re being glib but I hope you live friend