Reading Bruno Giussani is a delight. This history of the “@” or “at” sign is a keeper. Bruno is my favorite Swiss blogger and info theory blogger out there.
“The precise birth date of e-mail is unknown, but technology historians set it somewhere in late 1971, when a then 30-year old American computer engineer, Ray Tomlinson, did what he unassuming calls “a quick hack”. He successfully sent the first electronic message from a computer to an account (his own account, in fact) on another computer.”