Microsoft CEO Steve Ballmer says he will retire within 12 months.
QVC debuts second channel, QVC Plus.
Yahoo courts Katie Couric for video series.
Airbnb seeks to create "movie" entirely with Vine.
Al-Jazeera America makes debut with few national advertisers.
American Airlines and US Airways get states' support in merger bid.
Audi reveals new A8 family.
BMW will unveil X5 plug-in hybrid, featuring all-wheel drive, at Frankfurt show.
CBS cuts carriage deal with Verizon.
Coca-Cola hired private eye to snoop in Honest Tea trademark case.
Facebook makes ads prettier with Shutterstock partnership.
H&M follows David Beckham into the locker room.
Heineken can't compete with US craft-beer phenomenon, CEO says.
Koch brothers nix idea of buying Tribune papers.
Pandora sees mobile advertising revenues soar.
Popeyes Louisiana Kitchen succeeds in building consumer demand.
Samsung sees Galaxy tablet gain while Amazon feels Kindle Fire cool.
Sears can't get into black with loyalty program.
Subway focuses on Europe for growth.
Tecate challenges consumers' manhood.
Volvo wins approval for manufacturing at second China plant and will develop vehicles with Geely.