With new UNIX versions released, there were new filesystems added. And files might exist in those filesystems:
- VFS - virtual filesystem
- s5 - a very old and very clumsy filesystem :) from AT&T System V-3
- RFS - remote filesystem
- UFS - ultra-fast file system
- BFS - boot filesystem
- NFS - network filesystem
- PROC - process filesystem
- FIFOFS - flood-in flood-out filesystem
- SPECS - special filesystem
- FAT16 - old MS-DOS/Win3x/Win95 filesystem
- FAT32 - Win98/NT+ filesystem
- UMSDOS - cloned Linux
- ext2 - native Linux
- vfat - Win95 virtual FAT
- iso9660 - cd
... etc, etc.
