Ray Tomlinson, widely credited as the creator of modern email, died this week at age 74. Long before the Internet was a vital part of daily life, Tomlinson was working for a technology company in Boston in 1971. Searching for a way to send messages through computers, Tomlinson came up with the system that became modern email. As part of his system, he used the @ symbol. That symbol remains a standard part of all email addresses today.