The @ symbol is a widely recognized symbol used in modern communication, particularly in email addresses and social media usernames. It has become an integral part of modern communication and is used in a variety of ways. In this answer, we will explore the history and various names of the @ symbol.

The @ symbol has a long and interesting history. Its origins can be traced back to medieval Europe, where it was used as a shorthand symbol for “at the rate of”. The symbol was used in trade and commerce, particularly in markets where goods were sold by weight, to indicate the price per unit of weight. For example, a price of “10 shillings @ 1 pound” meant that the price was 10 shillings per pound.
Over time, the @ symbol became more widely used in other contexts, particularly in accounting and financial documents. By the early 20th century, the symbol had become a standard part of the typewriter keyboard, and it was commonly used in accounting and financial documents.
With the rise of the internet and email in the 1990s, the @ symbol took on a new and important role as a separator in email addresses. An email address typically consists of two parts, separated by the @ symbol: the username and the domain name. For example, john.smith@example.com. The @ symbol was chosen as the separator because it was not commonly used in email addresses and was easy to type.
The @ symbol is known by a variety of names, depending on the context and location. In English, it is most commonly known as the “at” symbol, due to its original use as a shorthand symbol for “at the rate of”. In other languages, it is known by different names. In Spanish, for example, it is known as the “arroba”, which comes from the Arabic word for “quarter”. In Portuguese, it is also known as the “arroba”. In French, it is known as the “arobase”, and in Italian, it is known as the “chiocciola”, which means “snail”.
The @ symbol has also taken on new meanings and uses in the age of social media. It is commonly used as a symbol to indicate a person’s username on social media platforms such as Twitter, Instagram, and Facebook. For example, a Twitter username might be @johndoe. The @ symbol is also commonly used in hashtags, which are used to group together posts on a particular topic. For example, #ThrowbackThursday might be used in a social media post with the @ symbol to indicate a post from a previous year.
In conclusion, the @ symbol has a long and interesting history, and it has taken on new meanings and uses in the age of the internet and social media. It is most commonly known as the “at” symbol in English, but it is known by different names in other languages. Its widespread use in email addresses and social media usernames has made it an essential part of modern communication, and it continues to evolve and take on new meanings and uses.