@

Called the “snail” by Italians and the “monkey tail” by the Dutch, @ is the sine qua non of electronic communication, thanks to e-mail addresses and Twitter handles. @ has even been inducted into the permanent collection of the Museum of Modern Art, which cited its modern use as an example of “elegance, economy, intellectual transparency, and a sense of the possible future directions that are embedded in the arts of our time.”

The origin of the symbol itself, one of the most graceful characters on the keyboard, is something of a mystery. One theory is that medieval monks, looking for shortcuts while copying manuscripts, converted the Latin word for “toward”—ad—to “a” with the back part of the “d” as a tail. Or it came from the French word for “at”—à—and scribes, striving for efficiency, swept the nib of the pen around the top and side. Or the symbol evolved from an abbreviation of “each at”—the “a” being encased by an “e.” The first documented use was in 1536, in a letter by Francesco Lapi, a Florentine merchant, who used @ to denote units of wine called amphorae, which were shipped in large clay jars.
via Smithsonian

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