Concept

Ray Tomlinson

Summary
Raymond Samuel Tomlinson (April 23, 1941 – March 5, 2016) was an American computer programmer who implemented the first email program on the ARPANET system, the precursor to the Internet, in 1971; It was the first system able to send mail between users on different hosts connected to 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 name from the name of their machine, a scheme which has been used in email addresses ever since. The Internet Hall of Fame in its account of his work commented "Tomlinson's email program brought about a complete revolution, fundamentally changing the way people communicate." He is credited with the invention of the TCP three-way handshake which underlies HTTP and many other key Internet protocols. Tomlinson was born in Amsterdam, New York, but his family soon moved to the small, unincorporated village of Vail Mills, Broadalbin, New York. His father Raymond Tomlinson worked in carpet mills and later worked in the grocery business. His mother Dorothy Tomlinson worked for a dry cleaner. He attended Broadalbin Central School in nearby Broadalbin, New York. Later he attended Rensselaer Polytechnic Institute (RPI) in Troy, New York where he participated in the co-op program with IBM. He received a bachelor's degree in electrical engineering from RPI in 1963. After graduating from RPI, he entered the Massachusetts Institute of Technology (MIT) to continue his electrical engineering education. At MIT, Tomlinson worked in the Speech Communication Group and developed an analog-digital hybrid speech synthesizer as the subject of his thesis for the master's degree in electrical engineering, which he received in 1965.' In 1967, he joined the technology company of Bolt, Beranek and Newman (now BBN Technologies), where he helped develop the TENEX operating system including the ARPANET Network Control Program, implementations of Telnet, and implementations on the self-replicating programs Creeper and Reaper.
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