In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.
|Upgrading from Windows 7 or 8? You'll love Windows 10|
|Windows 10 is seriously great|
|Samsung misjudged demand for its flagship smartphone|
|Oil prices have plunged nearly 20% this month|
|Facebook earnings: It's now the world's most-used tech product|