Aviation is beset with far, far too many of these bloody acronyms, usually mysteriously for some reason, made up of 3 letters....which everybody is supposed to know! H A S is a pretty good one, very strange! I suggest we have a limit- anyone who posts a weirdo aviation acronym of 3 letters or more (with the demented assumption that we are all supposed to know it) that I don't know is obviously taking the Uric acid and must pay a fine (to me)?