Brian J Fox is an American computer programmer, entrepreneur, consultant, author, and free software advocate. He was the original author of the GNU Bash shell, which he announced as a beta in June 1989. He continued as the primary maintainer for bash until at least early 1993.
In 1985 Fox worked with Richard Stallman at Stallman's newly created Free Software Foundation. At the FSF, Fox authored GNU Bash, GNU Makeinfo, GNU Info, GNU Finger, and the readline and history libraries. He was also the maintainer of Emacs for a time, and made many contributions to the software that was created for the GNU Project between 1986 and 1994.