7 facts about the @ symbol

1. One origin theory is that it was originally an abbreviation of the Greek preposition ανά, meaning at the rate of or per.
2. In Perl, the @ prefixes variables which contain arrays
3. In chemical formulae, @ is used to denote trapped atoms or molecules
4. the @ symbol has been admitted into the Museum of Modern Art in its design collection
5. In Swedish the symbol is known as kanelbulle which translates to 'cinnamon roll'
6. The symbol was added to Morse Code in 2004 for use with e-mail addresses, the only change since World War I.
7. The @ was included on the keyboard of 1885 American Underwood, the first typewriter