WATCH: Ten years of the hashtag

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Rock Challenge 2018 Crookhorn''College

PICTURES: Rock Challenge (Henry Cort/Crookhorn College)

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The hashtag is ten years old.

Over the past decade it has evolved from its humble beginnings. It's gone from a way to simply "tag" or categorise tweets to one of the most recognisable and widely used symbols of the digital age.

The hashtag

The hashtag