San Francisco's Train System Still Uses Floppy Disks—and Will for YearsThree 5.25-inch floppy disks help keep Muni running every morning. A tech upgrade could take until 2030.
Source: San Francisco's Train System Still Uses Floppy Disks—and Will for Years (https://www.wired.com/story/san-francisco-muni-trains-floppy-disks/)