- noun a unit of organisation of files stored on a disk, containing a group of files or further sub-directories
- A special kind of file which is used for indexing and organizing other files. It provides information such as the name, type, and size for each listed file. Directories that branch into other directories are called root directories, while those located within a root directory are called subdirectories. In GUIs, the term folder is preferred. Also called file directory.
- In a network, an index listing network resources, such as devices available, or email addresses.
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