DIR' A directory listing is a list of files and folders contained in a directory. The term 'directory listing' can be abbreviated to 'DIR, ' which is a four-letter word. This term is often used in computing, as it is a way to view the contents of a directory on a computer or other device. It is also used in web development, as it is a way to view the contents of a website's directory. Directory listings are useful for finding specific files or folders quickly, as they provide an organized list of all the items in a directory.