posting n. Noun corresp. to v. {post} (but note that
{post} can be nouned). Distinguished from a `letter' or
ordinary {email} message by the fact that it is broadcast rather
than point-to-point. It is not clear whether messages sent to a
small mailing list are postings or email; perhaps the best dividing
line is that if you don't know the names of all the potential
recipients, it is a posting.