It appears to be a Usenet / mailing list / email abbreviation [1]. I could see myself appreciating it when skimming mailing lists or large documents, but then a

It appears to be a Usenet / mailing list / email abbreviation [1]. I could see myself appreciating it when skimming mailing lists or large documents, but then again I could just use Ctrl-f or the like. [1]: https://en.wikipedia.org/wiki/Announcement_(computing) https://en.wikipedia.org/wiki/Announcement_(computing)