11 September 2015
Last updated at 18:18
Silicon Fen
Why Cambridge is the capital of start-ups
Tallinn's got talent
Estonia start-ups scooting to success
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Tennessee tech
Nashville plays a new tech-themed tune
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British Twitter
Could the UK create a new tech giant?
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Silicon Allee
Berlin's talented tech workforce
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Looking abroad
US tech firms look overseas for engineers
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Silicon Roundabout
Plans to transform London's tech hub
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Kenya's app boom
The rise of Kenya's app development industry
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Vietnam's start-ups
Vietnam's expanding video games industry
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Silicon Britain
Inside the UK's tech clusters
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Latin America's growing entrepreneurs
Entrepreneurship is growing across Latin America, as more and more people consider setting up their own businesses, reports the BBC's Gideon Long.