What does FS switch mean in MS-DOS?

In MS-DOS, the FS switch refers to a command-line option that allows users to specify the file system type for certain commands, particularly when formatting a disk. It helps in determining how the operating system should interpret the data on the disk. For instance, using the FS switch with the FORMAT command lets users choose between file systems like FAT12, FAT16, or FAT32, depending on the version of MS-DOS and the capabilities of the disk.