🛠️ Invention or technique

Network email and the @ sign

Correo electrónico en red y la arroba

Date
1971 · confidence high
Place
BBN, Cambridge, Massachusetts, United States
Credited to
Ray Tomlinson (BBN); earlier local messaging in MIT's CTSS (1965)
People
👤 Ray Tomlinson1941–2016
Field
Communication

What it is

First program to send messages between users on different computers over ARPANET, using the @ sign to separate user and machine. It was the killer app of networks for twenty years.

Shiva Ayyadurai claimed to have invented email in 1978, a claim rejected by historians.

What it led to

  • Global asynchronous communication and the culture of the connected office
  • Spam, phishing and social engineering
  • Instant messaging and social media as successors
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