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[
Usenet] To post a single article simultaneously to several
newsgroups. Distinguished from posting the article
repeatedly, once to each newsgroup, which causes people to see
it multiple times (which is very bad form). Gratuitous
cross-posting without a Followup-To line directing responses
to a single followup group is frowned upon, as it tends to
cause
followup articles to go to inappropriate newsgroups
when people respond to only one part of the original posting.