Cory Doctorow (@doctorow) posted a photo on Twitter

Retweeted Cory Doctorow (@doctorow): RIP Ray Tomlinson, email inventor and at-sign popularizer https://t.co/jVpG4ByhTn https://t.co/4xih3pmMzy
via jfrancisco.eti.br http://twitter.com/doctorow/status/730124440860823552/photo/1?utm_source=fb&utm_medium=fb&utm_campaign=jfranciscos4&utm_content=730125424576086019