In Usenet posts - about 15 years before Google - people used to add a pithy humorous sentence at the bottom called "tagline"

We always called them "signatures." They were even stored in a file named .sig.

▲ felineflock a day ago | parent | next [-]

The tagline was below or at the end of the signature.

They were stored separately in a list and there was software that would pick one of them randomly to add to the signature when posting.

▲ invaliduser a day ago | parent | prev | next [-]

taglines where witty one-liners posted at the end of messages, after the signature, as a way to add a bit of humor or personality.

I think we also used them in fidonet echomail, but I don't remember for sure.

	▲	JdeBP a day ago \| parent \| next [-]
		The problem is that the nomenclature and conventions differed, and this many years later people tend to conflate them. BBS networks like ILink had tearlines, optional taglines, and mandatory origin lines. FidoNet had tearlines and origin lines because it shared roots and sometimes nodes with the BBS networks; so they were there for compatibility. Usenet mainly had signatures, with all of its equivalents to the other stuff in headers. * http://ftsc.org/docs/fts-0004.001
	▲	int_19h 8 hours ago \| parent \| prev [-]
		In echomail they were known as "Origin" because the intended purpose of that line was to identify the originating node. It looked like this: `* Origin: any random text (12:34/56.78)` The text was supposed to be the name or description of the node, but this wasn't mandated by the rules, and the address at the end unambiguously identified the node anyway for anyone who cared, so people quickly repurposed it for taglines.

▲ angled a day ago | parent | prev [-]

^H^H^H^Hsignature