NUMBER SIGN

About this character

The number sign, also called hash, pound, or hashtag, is a punctuation mark originating as a shorthand for the Latin *libra pondo*, meaning pound weight, via the abbreviation “lb” with a bar. Today it is typographically versatile: in writing, it prefixes hashtags on social media; in code, it introduces comments in Python and shell scripts or hexadecimal color values in CSS; and in design, it marks numbers in headings and technical notation. Its dual life as both a functional computing symbol and a cultural tagging tool makes it a quietly ubiquitous character in digital and print contexts.

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