<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (November 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> In computing, a directory is a file system cataloging structure which contains references to other computer files, and possibly other directories . On many computers, directories are known as folders, or drawers to provide some relevancy to a workbench or the traditional office file cabinet . </P> <P> Files are organized by storing related files in the same directory . In a hierarchical filesystem (that is, one in which files and directories are organized in a manner that resembles a tree), a directory contained inside another directory is called a subdirectory . 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 . </P> <P> Historically, and even on some modern embedded systems, the file systems either had no support for directories at all or only had a "flat" directory structure, meaning subdirectories were not supported; there were only a group of top - level directories each containing files . In modern systems, a directory can contain a mix of files and subdirectories . </P>

What is the top folder of the file tree called