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![Number sign
The correct title of this article is #. The substitution of the # is due to technical restrictions.
Not to be confused with the Numero sign (№), or Sharp (music) (♯).
#
Number sign
In Unicode U+0023 # NUMBER SIGN (#)
Different from U+00A3 £ POUND SIGN
The symbol # is known as the number sign,[1] hash, or (in North America) the pound sign. The symbol has historically been used for a wide range of purposes including the designation of an ordinal number and as a ligatured abbreviation for pounds avoirdupois – having been derived from the now-rare ℔.
Since 2007, widespread usage of the symbol to introduce metadata tags on social media platforms has led to such tags being known as "hashtags", and from that, the symbol itself is sometimes called a hashtag.
The symbol is distinguished from similar symbols by its combination of level horizontal strokes and right-tilting vertical strokes.](https://pbs.twimg.com/media/G2j_Mj2a8AAj_ps.png?name=small&format=webp)
ALT Number sign The correct title of this article is #. The substitution of the # is due to technical restrictions. Not to be confused with the Numero sign (№), or Sharp (music) (♯). # Number sign In Unicode U+0023 # NUMBER SIGN (#) Different from U+00A3 £ POUND SIGN The symbol # is known as the number sign,[1] hash, or (in North America) the pound sign. The symbol has historically been used for a wide range of purposes including the designation of an ordinal number and as a ligatured abbreviation for pounds avoirdupois – having been derived from the now-rare ℔. Since 2007, widespread usage of the symbol to introduce metadata tags on social media platforms has led to such tags being known as "hashtags", and from that, the symbol itself is sometimes called a hashtag. The symbol is distinguished from similar symbols by its combination of level horizontal strokes and right-tilting vertical strokes.














