What does a directory do?

Another name for what is now called a 'folder'.

The Directory Limited is the business activities business based in Stockbury

Directories is a term not frequently used any more. The term more commonly used today are folders. They are the same thing however. Back in the days of ms-dos, files were stored in directories.

A subdirectory

To list the subdirectories in the current directory: find . -maxdepth 1 -type d To list the subdirectories and all their subdirectories: find . -type d