Apple, Amazon.com | featured news

Revenue at Barnes & Noble stores fell 10.9% during the holidays, as sales of Nook devices slipped, a sign that the retailer is falling behind in the tablet battle with Amazon, Apple and Google.

"You know, Google, I think, in some ways, is more competitive and certainly is trying to build their own little version of Facebook," Zuckerberg says. "But you know, when I look at Amazon and Apple and I see companies who are extremely aligned with us, right? And we have a lot of conversations with people at both companies just trying to figure out ways that we can do more together, and there is just a lot of reception there."

Ever since Amazon unveiled its 7-inch Kindle Fire tablet in September, a lingering phrase has been attached to the low-cost, high-profile device: "the iPad's first true Android competitor."

Apple could scarcely be more dominant in the nascent tablet computing market, but Amazon could change that in a hurry, a new study suggests.

Amazon’s souped-up color version of its Kindle e-reader hopes to undercut the iPad in price and steal away a couple of million in unit sales by Christmas.