There are a number of 'acronyms' that are in common usage on the newsgroups, (and e-mail, IRC, etc.). They are mostly there to quickly convey the intent of the writer. As with all jargon, if the reader does not understand what it means, the communication fails. So, we would humbly suggest that if you use an acronym not on the following "Most Common" list, that you should ask whether your readers will understand what you are saying. (Unless that is the point? - as in IITYWIMIWHTKY).