http://www.internethalloffame.org/official-biography-raymond-tomlinson Raymond Samuel Tomlinson (1941- 5 March 2016) is a US programmer who implemented an email system in 1971 on the ARPANET. It was the first system able to send mail between users on different hosts connected to the ARPAnet. (Previously, mail could be sent only to others who used the same computer.) To achieve this, he used the @ sign to separate the user from their machine, which has been used in email addresses ever since. The first email Ray Tomlinson sent was a test e-mail. It was not preserved and Tomlinson describes it as insignificant, something like "QWERTYUIOP". This is commonly misquoted as "The first e-mail was QWERTYUIOP". Tomlinson later commented that these "test messages were entirely forgettable and I have, therefore, forgotten them." At first, his email messaging system wasn't thought to be a big deal. When Tomlinson showed it to his colleague Jerry Burchfiel, Tomlinson said "Don't tell anyone! This isn't what we're supposed to be working on."