isr.co.ro : glossary Followup A public reply to a posting to a Usenet newsgroup, particularly one that includes in its routing information a link back to the original posting, so "newsreader" programs that present postings by threads (postings and replies) can attach it to the appropriate position. Most newsreader programs default to providing a followup to all the crosspostings (multiple newsgroups) mentioned in an original newsgroup. If these are excessive, it's considered good form to "trim followups" or "set followups" to only the appropriate groups.