It's hard to image a time when hashtags weren't employed as a means of providing focus to posts by those communicating via social media. While most prevalent within Twitter, even Facebook recently climbed onto the hashtag bandwagon, although adoption there remains marginal. The history of the hashtag can be traced back to 2007, when developer Chris Messina floated the suggestion in a tweet. The folks at Twitter apparently weren't particularly thrilled by the idea but when in October of that year hashtags were used to provide updates of forest fires in San Diego, acceptance began to quickly build. Thanks to blur Group for creating an infographic documenting the path to acceptance of this humble ASCII character.