The new system will replace the original 1998 system, which requires three floppy disks to function on DOS. Yes, DOS.
It's also worth noting that the SFMTA control system uses bulkier 5.25-inch floppy drives, not standard 3.5-inch floppies or larger 8-inch floppies. Speaking to Ars Technica in April, SFMTA ...
The San Francisco Municipal Transportation Agency (SFMTA) board has agreed to spend $212 million to get its Muni Metro light rail off floppy disks ... where the trains drive themselves while ...