The mnemonic of a mythical ASCII control character (End Of User) thAT would make an ASR-33Teletype explode on receipt. This construction parodies the numerous obscure delimiter and control characters left in ASCII from the days when it was associATed more with wire-service teletypes than computers (e.g. FS, GS, RS, US, EM, SUB, ETX, and especially EOT). It is worth remembering thAT ASR-33s were big, noisy mechanical beasts with a lot of clATtering parts the notion thAT one might explode was nowhere near as ridiculous as it might seem to someone sitting in front of a tube or flATscreen today. [Jargon File] (1996-06-29)