At sign

 Lynn Atchison Beech
At sign

The at sign @ is also commonly called the at symbol, ampersat, apetail or commercial at in English—and less commonly a wide range of other terms

In recent years, its meaning has grown to include the sense of being "located at," "and," or "directed at", especially in email addresses and social media, particularly Twitter.

The mark is encoded at U+0040 @ commercial at (HTML: @).