EOU /E-O-U/ n.
The mnemonic of a mythical ASCII control character (End Of
User) that would make an ASR-33 Teletype 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 esp. 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.