The iPad was Apple's entry into the 'tablet computer' market, with touch-controlled interface, and capable of use as an ebook reader, video and music player, digital photo frame, email and Web access device, etc.
Samsung Electronics Co., maker of Galaxy line, 6.1 million, 9 percent.
Amazon.com Inc., maker of Kindle Fire, 3.9 million, 6 percent
Barnes & Noble, maker of Nook products, 3.3 million, 5 percent
AsusTek Computer Inc., maker of Transformer line, 2.1 million, 3 percent
Other, 9.4 million, 14 percent
Source: IHS iSuppli