Once upon a time, before the cloud, flash drives, or CDs were invented to store our files, there was a humble plastic square called a floppy disk.
Released in 1971, the floppy disk (which today’s young’uns might recognize only as the “save” icon) allowed people to transfer data and programs between computers.
Although the last major manufacturer, Sony, stopped making floppy disks in 2011, there’s still some tech that relies on the remaining supply, per Wired.
The floppy disk is still used in:
Airplanes like some Boeing 747s and 767s, and Airbus A320s