Cover Story
Inventing New Technologies and Markets
Our second annual list of the world’s most innovative technology companies highlights businesses whose work is changing industries and lives.
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March/April 2011
Also in This Issue
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Featured Story
The New Money
Square, founded by the creator of Twitter, lets people accept credit cards with their smart phones. That innovation could transform transactions in surprising ways.
Jason Pontin
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Featured Story
Praying for an Energy Miracle
Every clean-tech startup these days claims to have a breakthrough that will finally make renewable and clean energy sources cheap enough to compete with fossil fuels. But are we really on the brink of a clean-energy economy?
David Rotman
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Featured Story
The Slow-Motion Internet
Google’s growth plans depend in part on whether it can make the entire Web faster.
Erica Naone
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Letters
Letters and Comments
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From the Editor
Is WikiLeaks a Good Thing?
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Graphiti
World of Ideas
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Notebooks
Curbing Carbon
Users Rule
Web Wins
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Demo
Building Batteries for Electric Cars
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To Market
Handheld 3-D
Power Walking
High-Definition Wi-Fi
Skiing by the Numbers
Graphic Appeal
Smart Cooking
A Taste of Science
Texting by Satellite
Battery-Powered Spectacles
Drowsiness Detector
Powering Sockets with Sunlight
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Q&A
Jonathan Rothberg
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Photo Essay
British Sea Power
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Briefing
Private Space Flight
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Reviews
Transparency and Secrets
How to Stop the Snoopers
It's Good to Be the Mayor
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Hack
Arduino Uno
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From the Labs
Information Technology
Materials
Biomedicine
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34 Years Ago in TR
Digital Watches and Pet Rocks
