BBS: A Documentary
Information about the film released in 2005. Includes details of research, a list of interviews, trailers, reviews, and an online ordering facility.
http://www.bbsdocumentary.com/

The BBS Corner
Source of information for both the BBS Sysop and the BBS User. Links to 3rd party software and primary software developers.
http://www.dmine.com/bbscorner/

BBS Promotions
Provides a resource describing the what, when, where, who, why and how of BBSing.
http://www.fanciful.org/bbs-promotion/

BBS Xchange
Banner exchange for BBS-related sites.
http://bbsx.thebbs.org/

BBSing.com
Presents the history of these systems and a global explanation of the way they work. Includes a large collection of links.
http://www.bbsing.com/

Official Intelec Home Page
The official Intelec Network Home Page. Intelec is an international BBS echomail network.
http://www.intelec.com/

Wikipedia.org: BBS Systems
Encyclopedia article that gives an overview of these systems, their history and a brief presentation of their content, along with links to more specialized articles.
http://en.wikipedia.org/wiki/Bulletin_board_system