Where it's @

John Brownlee writes (more than I want to know) about the @ symbol.  Interestingly, he does not give it a name.  He talks about @ or the @ symbol.  However, some cultures have colorful names for the ubiquitous @. 

In Danish, the symbol is known as an “elephant’s trunk a”; the French call it an escargot. It’s a streudel in German, a monkey’s tail in Dutch, and a rose in Istanbul. In Italian, it’s named after a huge amphora of wine, a liquid some Italian bookkeepers have been known to show a fondness for.