"What happened, get lost in the directory tree again?"

This is said to produce a more straightforward, less cluttered directory tree.

Support for 1 to 23 million virtual e-mail domains using a "grow as it goes" balanced directory tree.

The initial context is analogous to the root or top of a directory tree for a file system.

The exact path and contents of that directory tree vary.

A program that is run in such a modified environment cannot name (and therefore normally not access) files outside the designated directory tree.

Plan 9 allows the user to collect the files (called names) from different directory trees in a single location.

The following example demonstrates walking a directory tree, starting at the current directory.

The framework allows applications to register for notifications of changes to a given directory tree.

The directory tree (if enabled) was now shown beside the list of icons, rather than instead of it.