U+0023 "#" Number Sign Unicode Character

U+0023 "#" Number Sign is a typographic symbol commonly known as the hash, pound, or number sign, encoded in the Basic Latin block since Unicode 1.0. It originated as a shorthand for the Latin word libra pondo, meaning pound weight, and later evolved into a versatile symbol used in computing and telecommunications. In modern contexts, it serves as the octothorpe for indicating numbers in lists, the sharp in musical notation, a prefix for hashtags in social media to group topics, and a character for special commands in programming languages and markup.