 macOS stores resource forks and metadata (file attributes, other ADS) using AppleDouble format in a hidden file with a name constructed from the owner filename prefixed with "codice_14", and Finder stores some folder and file metadata in a hidden file called "codice_15" (but note that Finder uses codice_15 even on macOS' native filesystem, HFS+).Early GNU/Linux distributions also supported a format known as UMSDOS, a FAT variant with Unix file attributes (such as long file name and access permissions) stored in a separate file called "codice_17".UMSDOS fell into disuse after VFAT was released and it is not enabled by default in Linux from version 2.5.7 onwards.