(Distributed File System) An enhancement to Windows server operating systems that allows files scattered across multiple servers to be treated as a single group. With Dfs, a network administrator can build a hierarchical file system that spans the organization's LANs and WANs. Dfs was introduced with Windows NT, and the root of a Dfs file hierarchy resides on a Windows server or on a Samba server. See Samba.

Dfs vs. DFS
Microsoft deliberately used lower case letters in Dfs because DFS (all caps) stood for the Distributed File System that was part of the Distributed Computing Environment (see DCE).