At present, the tablet computer market are mainly dominated by apple's iPad in 2011, and iPad will no doubt face many of the competition from the outside world. Recently, Techradar website announced the five best of the iPad tablet computer replacement, specific as follow:

1. samsung among Tab P1000 GT-

Specifications configuration: Android 2.2 operating system, 1 GHz Cortex A8 CPU, 512 MB RAM, 16 GB / 32 GB storage space, 7 inch capacitive LCD screen, for 1024 x600 resolution, 3.2 million pixels rear camera, 1.3 million front camera, support 3 G connection function, weight of 380 grams.

Conclusion: from the whole aspect, samsung among Tab P1000 GT could not bring the expected user surprise. Samsung among Tab P1000 GT-was the first iPad competitor to the identity to come into the market, but didn’t beat the iPad

2. MOTOROLA Xoom

Specifications configuration: Android 3.0 operating system, Nvidia Tegra 2 dual core CPU,-1 GB RAM, 32 GB flash memory storage space, 10.1-inch capacitive LCD monitor, resolution for 1280 x800, proximity sensors, an ambient light sensor, barometer, gyro, 5 million pixels rear camera, 2 million pixels lead camera, support 3 G network connection, weight of 730 grams.

Conclusion: MOTOROLA Xoom is a second generation Android tablet computer, the Nvidia Tegra 2 dual-core processor, and run the Android 3.0 tablet friendly operating system, and is a very powerful tablet computer.

3.  HP TouchPad

Specification: WebOS 3.0 operating system configuration, 1.2 GHz dual-core Snapdragon CPU, 1 GB RAM, 16 GB / 32 GB storage space, 9.7-inch capacitive touch screen and screen resolution for 1024 x768, 1.3 million pixels lead camera, weight of 740 grams.but all tablet computer can not suport ebook, and can replace the kindle for readhing,here I recommend a good tool:PDF editor mac for you when you want to read PDF ebook on iPad,with it you can copy text from PDF with easy.

4. asus Eee Pad MeMo

Specification: Android 1.2 GHz qualcomm Snapdragon 2.3/3.0, CPU, 512 MB RAM, 7 inch capacitive liquid crystal display (LCD), 64 GB flash memory storage space, front camera, rear camera, mini HDMI output.

apple tablet computer software rivals also is not smooth. According to the market research company Analytics says that, apple tablet PC BIOS of the second quarter to software tablet computer 61.3% market share, Google is more than twice the result platform. Microsoft's market share only 4.6%, the market share of the RIM is only 3.3%.

Time will tell us whether apple maintain dominance, but at present, we can see, the answer seems to have clear.PDF to word for mac