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I was under the impression that it was popularized by IRC #channels

• kardos 9y ago
  I thought it was to make keyword searches work on twitter
  • cmrdporcupine 9y ago
    Sure but that notation looks obviously inspired by IRC to me.
    • fernandotakai 9y ago
      when i started using twitter back in 2008, that's how it felt to me -- that # tags were basically irc rooms and twitter itself was just a big async irc
• reitanqild 9y ago
  Twitter hashtags has obvious similarities and differences to IRC channels. However I have a strong feeling that I modified/used hashtags (as tagging, not as a channel) back in 2005/6. I think I got the idea from another system (probably some early wiki) but I'm unable to recall now.