Here are entered works on services, commonly called newsgroups and LISTSERV lists, that allow a computer user to post messages to, and read messages from, a group of people who have a common interest, usually by means of the Internet, a commercial online service, or electronic mail. Works on services that allow a computer user to post messages to, and read messages from, a group of people who have a common interest, via a dedicated telephone line established for the purpose, are entered under Computer bulletin boards. Works on services that allow a person, using a computer, to engage in an actual "conversation" with other people in real time are entered under Online chat groups. --subdivision Electronic discussion groups under subjects; and names of individual electronic discussion groups
Here are entered general works on subject headings and lists of subject headings in the English language. This heading may be further subdivided by the topic of the subject headings, e.g., Subject headings--Aeronautics.