¶PunctuationPunctuationBasic LatinReviewed 2026-08-08

COMMERCIAL AT

Commercial at, the ASCII at sign used in addresses and handles.

U+0040 · 15.1.0 · Common script

About this character

The at sign (@), formally the commercial at, is a punctuation mark historically derived from the medieval scribal abbreviation for Latin *ad* (“to” or “at”). It first flourished in commercial ledgers to denote unit prices, as in “12 apples @ $1.” Its modern ubiquity began with Ray Tomlinson’s 1971 choice of @ for email addresses, separating user from host, and later expanded to social media handles and mentions. In programming, @ marks annotations, decorators, and array or attribute syntax in languages such as Python, Java, and Perl. Typographically, it remains a single versatile glyph for location, address, and interaction.

Copy formats

FormatValueAction
UTF-840
UTF-160040
HTML@ / @
CSS\000040
JavaScript\u0040
Python\u0040
URL%40

Character

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