From Wikipedia, the free encyclopedia
||This article needs additional citations for verification. (October 2007)|
- Amateur, CB or FRS radio contacts.
- Chatrooms and Instant Messaging.
- Computer networks. See back-channel.
- In-person communication.
- Telephone conversations.
|This article relating to communication is a stub. You can help Wikipedia by expanding it.|
|This article related to telecommunications is a stub. You can help Wikipedia by expanding it.|