In selling its own tablet computer called Nexus 7, Google Inc. is entering a market dominated by Apple Inc. Six out of every 10 tablets shipped last year were iPads, according to research firm IHS iSuppli. Google's new tablet is being made by AsusTek Computer Inc., a Taiwanese company.

Here are the top five manufacturers of tablets last year:

Apple Inc., maker of the iPad, 40.5 million shipped worldwide, 62 percent share

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