It also is used in e-mail addresses… [email protected]. Does that help?

There are a few theories of how it originated. Some say it was the creation of monk scribes in the Middle Ages, abbreviating the word “ad” which is Latin for at. Others say that it developed as a cursive form of the French word “à” which means at, as well. It was also used by the Spanish to denote a unit of weight/volume — it became an abbreviation for “arroba,” a Spanish word meaning amphora, which is a vessel in which wine was held. Now it holds the meaning of “at the rate of” or “at.”

2)It also means at the rate of.

someone “at” somewhere .com