<Table> <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> </Table> <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>

Which of the following is not a common file system for computers in the personal computer category