The @ sign existed before the Internet. Who gave it a second life?

A small a wrapped in a loop, in the middle of billions of email addresses. It is easy to assume that @ was invented for the Internet. In fact, computing gave a much older character a second career.

Who first drew it? There is no securely identified single inventor. MoMA describes competing explanations involving handwritten abbreviations and trade. Its commercial and accounting uses long predate email, including the sense “at a unit price of”.

Two stories therefore need separating: the debated origins of the mark and the documented technical choice that made it ubiquitous.

1971: an existing character finds a new purpose

The second story takes us to Ray Tomlinson, an engineer at Bolt Beranek and Newman. In 1971, he worked on sending messages between computers on ARPANET. Addressing them required a way to distinguish the user from the destination machine.

The @ character was already on the keyboard and suited that separation. Read as “at”, it linked a person to a location. The choice reused an available sign rather than inventing one.

Tomlinson also contributed to early network email standards, as the Internet Society records. Today’s email developed through many subsequent contributions: treating it as one invention at one instant would obscure that collective work.

After @ comes a responsibility that now matters to businesses

The format now seems obvious. In contact@example.com, “contact” identifies a mailbox or role and “example.com” is the domain. The name is reserved here for a documentation example.

For a business, that small separation has a practical consequence: a domain name and an email provider are different things. One can be retained while the other changes, provided the migration is arranged. The address customers recognise can stay stable while the services behind it evolve.

Perhaps that is what makes @ so effective. An old commercial mark became a universal reference without requiring us to know its history every time we use it.