In 1988, Amiga produced the Fast File System (FFS) for use on the AmigaOS version 1.3 in 1988. The FFS file system was an update to what was later termed “Old File System” (OFS), released in 1985. FFS was backward compatible with OFS. The file systems were both released for the Amiga systems which had hard disks or floppy disks. Originally, the AmigaOS was termed AmigaDOS or Workbench and FFS had a version number of v34. The Fast File System was first supported by Linux kernel 2.1.x.