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The history of a @ sign
The man, who is known as the creator of e-mail and the @ sign, nothing of the sort invented, although the history of "dogs" and the e-mail is closely intertwined.
History of the @ sign originates, ostensibly, in the Middle Ages, when monks - the keepers of ancient knowledge and manuscripts - were engaged in translating and rewriting tracts - including written in Latin. In Latin preposition used "ad", which translated into modern English means "at" ("on", "c", "k") - and points to the origin, direction and approach. In the font used by the monks, the letter "d" had a small "tail", which made her look like the number "6" in the mirror. So "ad" was rapidly @.
In the XV century, @ reappears. Spanish merchants used this sign as a measure of weights acronym - "arroba" (this is approximately 11.52 kg or 25.40 pounds). Curiously, this measure was used to the weight of cattle and wine.
In the Renaissance, @ was used to denote the price, and in the era of the industrial revolution (the time of the capital, the first exchanges, machine tools and so on) @ was invariably occur in the accounting records. For example, "dog", with $, #,%, and other "schetovodnymi" signs with the almost forgotten semantics migrated to the keyboard.
"Doggie" peacefully waiting for his moment of glory, until it accidentally fell opinion of Ray Tomlinson (Ray Tomlinson), researchers from the U.S. company BBN Technology.
Here we must digress and say a few words about what he did Tomlinson and why it is considered not only the inventor of the e-mail, but actually the @ sign, although neither one nor the other, he is not. The company BBN Technology, where he worked Tomlinson, in the late 60's was one of the participants in ARPANet - a network of computers, the immediate predecessor of the Internet - which was carried out by order of the Ministry of Defense.
In those years of the program, allowing you to transfer files and messages from one user to another, already existed. But the sender and receiver use the same computer. The fastest modem was working two hundred times slower than a modern standard that "shakes" at a rate of 56.6 kbit /