 OS/2 added long filename support to FAT using extended attributes (EA) before the introduction of VFAT.Thus, VFAT long filenames are invisible to OS/2, and EA long filenames are invisible to Windows; therefore experienced users of both operating systems would have to manually rename the files.Human68K supported up to 18.3 filenames and (Shift JIS) Kanji characters in a proprietary FAT file system variant.