Fidonet is an international network that was created in 1985 for recreational and hobby purposes. Since then, there have been a number of developments created in Fidonet. Developments include, for instance, a large section of the modem protocols.

Worldwide network of personal computers started in the 1980's. Used to exchange email, but also for discussion groups.

A collection of discussion groups similar in concept to Usenet, but handled through individual BBSs rather than through servers on the Internet. The term also refers to the collection of BBSs which carry the discussion groups and between which mail messages can be sent. See also netmail.

is an amateur electronic mail network with almost 40,000 mail node world-wide.

A worldwide hobbyist network of personal computers started in 1984 that exchanges mail, discussion groups, and files.

A network of cooperating bulletin board systems that has some links to the Internet.