A short, one-line message appended to an echomail, local, or RelayMail message by some communications programs. Many BBS s use the tagline to list the name, location, phone number, and network address of the BBS. Many offline mail readers allow users to use taglines to say anything they like. Many users create collections of funny taglines they use to express the quirkier side of their personalities. Similar to a sig block on the Internet.