This is not on the SCS website but in my house we have a lot of:
TLA's - three letter abbreviations
the best being:
RTM - Read The Manual (applies to any case of idiocywhen directions aren't followed - and usually applied to DH)
BTW (by the way), just for the pedantic (like me), most of those mentioned are TLAs, not acronyms, which according to the dictionary are words made up out of abbreviations. So RADAR (a pronouncable word) is an acronym and IBM (not really pronuncable), is not.
Comes of growing up in a house of English teachers!