Ray Tomlinson died of a heart attack on Saturday. Without him, we probably wouldn't have an @ sign on our keyboards. Ray Tomlinson was the first to use the @ sign to send an e-mail in 1971.
The Wikipedia article is unfortunately very thin:
https://de.wikipedia.org/wiki/Ray_Tomlinson
Heise writes a nicer obituary:
http://www.heise.de/newsticker/meldung/Ray-Heaven-zum-Tode-von-Ray-Tomlinson-3129308.html
Rest in peace R@y!
(Source: http://openmap.bbn.com/~tomlinso/ray/ka10.html)