File Naming

All current operating systems allow strings of one to eight letters as legal file names. Windows file systems: FAT-16, FAT-32, NTFS, ReFS (Resilient File System) File extension is the part following the period in the file name. In Windows file names are 1-8 characters plus optional extension of 1-3 characters. In UNIX the size of the extension is up to the user, and a file may have two or more extensions. Extensions are conventions in UNIX but Windows is aware of the extensions and assigns meaning to them.