"Characters that aren't letters may have longer names. For example the bell character, after which Bel is named, is

\bel"

There it is! Thanks.

Ah - brings back memories of the old teletype I first used that had an actual mechanical bell that rang if it got that. Similar to https://trmm.net/Model_ASR33_Teletype

My guess would have been a short for BEtter Lisp ;-)

I’ll wait for lim.

Just guessing. His previous language is called arc, it has three letters and starts with an \a.

I am not convinced - ‘\a’ had already been taken by C.