On the Internet @ symbol is used as a link between the user name and domain name, which divides them into syntax e-mail addresses.
In February 2004, the International Telecommunication UnionTelecommunications has introduced a new code in the Morse code for the symbol @. It was introduced for the convenience of transmitting e-mail addresses and combines the letters A and C. This fact proves the importance of character.
The story of the @ symbol
History of the @ symbol does not startlater the XV century. Thus, according to one hypothesis, the documents of the XV century merchants found such references as "the price of one A wine", where A may denotes an amphora. At the same time this letter, in the tradition of those times, was decorated with curls and looked like @. According to another version, the @ sign was invented by medieval priests to reduce the Latin word of ad, is used as a generic expression denoting the prepositions "on", "in" and the like. The Spanish, French and Portuguese origin of the symbol is associated with the word "arroba" - a medieval measure of weight, which is abbreviated letter @ symbol.
The current official name of the character -"Commercial at». This is due to the fact that one of the meanings of the word is at the preposition "for." And the phrase itself comes from commercial accounts, for example, 5 newspapers @ $ 3 or 80 shares @ 60 cents. In connection with the widespread use of this symbol in the business, he was placed on the keyboards of typewriters, with whom he moved to the computers.
The progenitor of this symbol on the Internet isdeveloper of e-mail Ray Tomlinson. This man chose the icon, which is now found in all e-mail addresses. When asked why he chose that particular designation, he said: "I was looking for a symbol on the keyboard, which could not occur in any of the names and, thus, would not cause confusion." Tomlinson @ symbol in handy at a time when he began work on the network Arpanet - the forerunner of the modern Internet. His task was to come up with a new addressing system, which has identified not only users, but also the computers on which they are located mailboxes. This is why the developer needed a separator, and the choice was made in favor of the @ sign. The first address in the network has become almost Tomlinson tomlinson @ bbn-tenexa.
Why is "dog"?
There are several theories about the origin of thisthe words. The first and the most banal - icon, in fact, like a curled dog. The second - the sound a bit like the English at intermittent barking dog. Another one of the versions in the sign @, you can see all the letters, which are included in the word "dog." Also, there is a romantic version, according to which the name "dog" migrated from the old computer Adventure game. The meaning of the quest was a fictional journey through the labyrinth of the computer, which was painted the symbols "+", "-", "!" And, as the opposing player monsters denoted by letters. And the plot of the game the player has been loyal assistant - a dog, which, of course, indicated by @. However, to find out whether it was the root cause of the common name, or the game appeared after the word "dog" has become a well-established, it is not possible.