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39 Jack Dorsey ***New**

Executive chairman and co-founder, Twitter

The 35-year-old American behind internet phenomenon Twitter has continued to innovate. Apart from returning as executive chairman at the company he set up, he’s also seen a marked rise in Twitter usage by the fashion industry. As the desire for information as it happens grew to insatiable levels, retailers, official bodies and publishers figured out how to harness the service’s power. Outside of Twitter, his mobile device and app, Square, has been a hit in the US with 2012 heralding a full international roll-out. Can we sum him up in 140 characters? Fashion’s adoption of Twitter on a scale never seen before (see @HilaryAlexander etc) + huge pick-up of mobile device card reader tech = win.

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