Arroba is the symbol that was used to represent the called mass unit entrances : @ (plural @@). An arroba is equivalent to the quarter of Quintal and comes from Arab الربع (ar-rubʿ, quarter, a quarter of quintal, that is to say 25 pounds, weight equivalent to 11.
At present very is known by the users Computer science because it is used to indicate In line “in” ( AT in English ) in directions of Electronic mail and other services that uses the usuario@servidor format .
The fact that it appeared in the keyboards it is that the present keyboards are, partly, copy of the old typewriters, and the typewriters had it not by their relation with the mass unit, but because mainly of text books one @ represented the area symbol, like surface measurement.
In English language it is used like replacement of preposition “AT”, like in the phrase: “100 psi @ 2000 rpm” (100 pounds by square inch to 2000 RPM).
In Spanish “arroba” is said, but other languages much more use descriptive expressions, that make reference to Spiral final or its supposed similarity with the tail of some animal:
in Afrikaans, “tail of Monkey ” (aapstert)
In Spain also is one that uses the word “ Ensaimada ” that also designates to a typical spiral bun of Majorca, although lately also there is one that talks about to her like " bayonesa".
In 1971 Ray Tomlinson looked for a symbol to separate the name of the person of the place where it was. Some typewriters, developed from 1884, included this sign (as the Lambert made in 1902) due to their commercial use, and the keyboard of a Model-33 Teletype (a model of Teletype ) contained an arroba, that was the sign used by Tomlinson, that sent the first message with her from its computer PDP-10 to another one. This one was the first electronic direction of history we know as them now:
In the last years, due to the height of Politically correct, in particular of the use of a nonsexist language, is extending the custom to make the reference to both sexes explicit when animated nouns or adjectives are used:
Since this form is releases and troublesome, the use of the symbol of the arroba has begun to extend (@) as graphical resource to integrate in a single word the forms masculine and feminine of the noun, since this sign seems to include in its outline the vowels To and Or :
The use of the arroba to integrate in a single word the forms masculine and feminine of the noun is very frequent in political parties, associative movements, it presses young person, and it has even been used in some institutional campaigns. Its extension on the part of the political parties is also implied to want to take progress and modernity an air.
Real Academy does not admit these options by several reasons:
In the nouns that designate animated beings, masculine the grammar one is not only used to talk about to the individuals of masculine sex, but also to designate to all the individuals of the species, without sex distinction. Such use of the masculine grammar sort does not denote discriminatory intention some, but the application of the linguistic law of the expressive economy.
Only needs the use of both sorts when the opposition of sexes is an excellent factor in the context:
the expressions forced and unnatural like and the students are not admitted Either .
Arroba, in DRAE .
Arroba, in panhispánico Dictionary of doubts .
Uso of the masculine one with reference to both sexes, in panhispánico Dictionary of doubts .
Uso of the arroba as sort mark, in panhispánico Dictionary of doubts .
Photo of a Spanish manuscript that includes arrobas.
Text where it explains the origin of @ in the electronic mail, by Ray Tomlinson .
'' Arroba '' in Kimniekan
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