Top 5 manufacturers of tablet computers in 2011

This product rendering released by Microsoft shows Surface, a 9.3 millimeter thick tablet with a kickstand to hold it upright and keyboard that is part of the device's cover. It weighs under 1.5 pounds. The device is part of the software company’s effort — This product rendering released by Microsoft shows Surface, a 9.3 millimeter thick tablet with a kickstand to hold it upright and keyboard that is part of the device’s cover. It weighs under 1.5 pounds. The device is part of the software company’s effort to compete with Apple Inc. and its popular iPad tablet computer.

In producing its own tablet computer called Surface, Microsoft Corp. is entering a market dominated by Apple Inc. Six out of every 10 tablets shipped are iPads, according to research firm IHS iSuppli.

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

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