 A UNIX United system constructed with the Newcastle Connection is functionally indistinguishable from a centralised UNIX system at the system-call level.In essence, the concept of the "parent directory" was re-interpreted at the root of the filesystem, where it originally had no significant meaning, to mean "this directory is on a remote machine", similar to subsequent "Super-root (Unix)" usage.As a reminder, a typical single UNIX directory tree might resemble