An index of files stored on a disk, the listing of which can be displayed on a screen or printed by invoking a computer command. A directory occurring within another directory is called a subdirectory. A sequence of symbols used to indicate an emotional state in e-mail. Filename extension . The portion of a filename, following the final point, which indicates the kind of data stored in the file.
Many operating systems use filename extensions.
They are usually from one to three letters in length. Software, often written by enthusiasts, that is distributed at no charge by users' groups or via electronic mail, local bulletin boards, Usenet, or other electronic media. A network within an organization that provides services similar to those provided by the Internet. An Intranet is not necessarily connected to the Internet. A company would set up an Intranet for distribution of information within the company.