Historical records trace the first documented use of @ to 1536, in a letter written by a merchant in Florence, Italy. In that context, the symbol meant “at the price of,” marking the cost of goods in trade. This discovery, published in 2000 by Giorgio Stabile, a professor of the history of science at La Sapienza University, offered a clear origin story for a character that had puzzled researchers for years.

Other theories suggest the symbol may have evolved from the Latin word ad, meaning “at,” “to,” or “toward.” Medieval scribes, who often relied on shorthand to save time, may have stylized the letters into the now-familiar loop. Much like the ampersand (&), @ could have been born from the need to simplify writing.

There are even earlier traces: in a 1345 Bulgarian translation of a Greek chronicle, @ appeared as a substitute for the letter “A” in the word “Amen.” However, this usage was isolated and never repeated, leaving scholars uncertain about its significance.

French clerks, meanwhile, may have used @ as a decorative version of the word “à.” While this interpretation aligns neatly with modern usage in email addresses, evidence remains too thin to confirm it as fact.

By the 19th century, @ had become a staple in commerce. Shopkeepers and accountants used it in ledgers to indicate prices, such as “10 units @ $5.” Its widespread adoption led to its inclusion on typewriter keyboards, though it had no connection to computing at the time.

The turning point came in 1971, when computer scientist Ray Tomlinson developed the first email system on ARPANET, the precursor to the internet. He needed a symbol to separate usernames from host addresses - something distinctive, rarely used in everyday language, and unlikely to cause confusion. He chose @. That simple decision transformed the symbol from a fading relic of trade into the cornerstone of global digital communication.

In a 2012 interview, Tomlinson explained that he picked @ simply because it was “not used much” and easy to recognize. Alternatives like the exclamation mark or comma didn’t fit, and the equals sign lacked clarity. His choice gave @ a new life, embedding it permanently in the digital age.

Today, @ is not only functional but also cultural. Different languages have given it colorful nicknames: “monkey’s tail” in Afrikaans, “elephant’s trunk” in Danish, “snail” in French, and “puppy” in Russian. Each reflects the creativity of how societies interpret its shape.

From medieval manuscripts to modern inboxes, @ has traveled through centuries of history. What began as a shorthand for trade has become a universal symbol of connectivity, embodying the intersection of language, commerce, and technology.