Information: - GNU is an operating system and an extensive collection of computer software. GNU is composed wholly of free software, most of which is licensed under the GNU Project's own GPL. - Emacs and its derivatives are a family of text editors that are characterized by their extensibility. The manual for the most widely used variant, GNU Emacs, describes it as "the extensible, customizable, self-documenting, real-time display editor". Development of the first Emacs began in the mid-1970s and continues actively . - GNU Emacs is the most popular and most ported Emacs text editor. It was created by GNU Project founder Richard Stallman. In common with other varieties of Emacs, GNU Emacs is extensible using a Turing complete programming language. GNU Emacs has been called "the most powerful text editor available today." With proper support from the underlying system, GNU Emacs is able to display files in multiple character sets, and has been able to simultaneously display most human languages since at least 1999. Throughout its history, GNU Emacs has been a central component of the GNU project, and a flagship of the free software movement. GNU Emacs is sometimes abbreviated as GNUMACS, especially to differentiate it from other EMACS variants. The tag line for GNU Emacs is "the extensible self-documenting text editor". - Dired is a visual directory editor , a computer program for editing file system directories . Dired runs on any Emacs platform . Its commands are generally more modal than most Emacs commands because Dired is a specialized major mode on its own . Dired can perform all expected operations ; in operation and use it is akin to an orthodox file manager like Midnight Commander . Dired was the first visual editor of file system information , or File Manager . Later examples include the Windows File Explorer ( formerly Windows Explorer ) and the Apple Macintosh Finder . Dired was invented c. 1974 at the Stanford Artificial Intelligence Laboratory ( SAIL ) as a stand - alone program by Stan Kugell . It was quickly incorporated into Emacs , re-implemented in other operating systems , and became the basis for modern window - oriented file directory displays . Several Emacs Lisp scripts have been developed to extend Dired functionalities in Emacs . In combination with Tramp it is able to access remote file systems for editing files by means of SSH , FTP , telnet and many other protocols , as well as the capability of accessing as another user for editing files with restricted permissions ( such as administrator access ) in the same session . There are also functionalities that make it possible to rename multiple files via search and replace or apply regular expressions for marking ( selecting ) multiple files . What is the relationship between 'dired' and 'free software movement'?
A:
movement