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The symbol # is known variously in English-speaking regions as the number sign, [1] hash, [2] or pound sign. [3] 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 ℔ .
For example, a search within Instagram for the hashtag #bluesky returns all posts that have been tagged with that term. After the initial hash symbol, a hashtag may include letters, numerals or other punctuation. [2] The use of hashtags was first proposed by American blogger and product consultant Chris Messina in a 2007 tweet.
The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
Hash mark (sports), a marking on hockey rinks and gridiron football fields; Hatch mark, a form of mathematical notation; Number sign (#), also known as the hash, hash mark, or (in American English) pound sign; Service stripe, a military and paramilitary decoration; Tally mark, a counting notation; Checkmate symbol in chess
Channels or topics that are available across an entire IRC network are prefixed with a hash symbol (as opposed to those local to a server, which use an ampersand). HTML has used # as a fragment identifier from the very start of the World-Wide Web ( c. 1993 ).
On Wikipedia, a number sign, #####hash sign###, ###pound sign or #####hashtag (#) may refer to one of the#### follow#ing uses: Number signs used in wiki markup Number signs used to create ordered lists ##
A hashtag is a kind of metadata tag marked by the prefix #, sometimes known as a "hash" symbol. This form of tagging is used on microblogging and social networking services such as Twitter, Facebook, Google+, VK and Instagram. The hash is used to distinguish tag text, as distinct, from other text in the post.
This page was last edited on 15 April 2004, at 16:20 (UTC).; Text is available under the