A listing is just a place for saving documents on your PC. The second name of directory is folder. Files on your hard disk are prepared into various folders, or directories, so that it is easier to maintain track of them.

A directory sites are observed in a hierarchical files system for example DOS, OS/2, UNIX, etc., a person generally implies the title of the directory.

The terms parent and child are often used to describe the relationship between a subdirectory and the directory in which it is cataloged, the latter being the parent. The top-most directory in such a filesystem, which does not have a parent of its own, is called the root directory.

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The hard disk was invented on September 13, 1956 by IBM team led by Rey Johnson (considered as “father” of the disk drive). Earlier hard disk drives were large and cumbersome devices.