Less than 4 years after they were introduced by Amazon, e-books have now overtaken print.
NASA is turning to private companies to replace the space shuttles, and it will give four proposals from the likes of Boeing and SpaceX $269 million this year.
Amazon's new Kindle with Special Offers costs $25 less but also exposes readers to advertising.
Mark Zuckerberg, who's been portrayed in a Hollywood movie this year and has seen his social media empire grow ever larger, has been named TIME magazine's 'Person of the Year' for 2010. Mark Zuckerberg launched Facebook in 2004.
Kindle, according to some experts, has revolutionized the world of literature. Amazon is scheduled to release a second version of the Kindle next month. Meanwhile, an e-book price war has broken out.
Amazon reserves the power to issue revised versions of certain Kindle e-books. Some books, however, aren't meant to be revised to death.
The nation's entrepreneurial prowess may be the best hope to stem 9.7 percent unemployment. Companies from a laser-tech firm to a baby-sitting network are harnessing new ideas – and helping reinvent the economy.