At sign

The at-sign, @, normally read alood as "at", an aa commonly cried the at seembol or commercial at, an less commonly a wide range o ither terms (sic as the strudel^[1]), is oreeginally an accoontin an commercial invyce abbreviation meanin "at a rate o" (e.g. 7 widgets @ £2 = £14). It wis nae includit on the keybuird o the earliest commercially successfu typewriters, but wis on at least ane 1889 model^[2] an the very successfu Underwood models frae the "Underwood No. 5" in 1900 onward. It is nou universally includit on computer keybuirds. The merk is encodit at U+0040 @ Commercial AT (HTML @).

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At sign
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