"It's the most powerful tablet in the world... It's a PC, but it's not very PC," said Jonney Shih, chairman of Asustek.

The device will launch in January for between $999 and $1099, the company said.

The company's smaller tablet, the Eee Pad MeMO, has a 7-inch multitouch screen and uses Qualcomm Snapdragon chips and Google Android. It has dual cameras and can handle 1080p high-definition playback. A media phone extender, the meMIC, gives it phone calling capabilities. The device will launch in June for between $499 and $699.

Finally, the Asus Eee Pad Transformer is a 10.1-inch touchscreen tablet that also has Google's Android OS on board and Nvidia Tegra 2 dual-core processors inside. The device is named after its ability to transform into a laptop from a tablet. The screen comes off the full-sized keyboard. The screen part is thinner than an iPad, at 12.98 mm, and the device offers Flash video and full HD multimedia. It will launch in April for $399 to $699, the company said.

Apple presided over the tablet craze by launching the iPad in April and shipping nearly 8 million units through the end of September. By being first, Apple has set the tone for the entire market. The company's App Store, e-books, music and other content have made it important for tablet makers to use the same OS in their tablets as in smartphones so everything can be shared. Asustek has diverged from the pack by putting Windows 7 on the Eee Slate E121, which is also one of the biggest tablets so far, at 12 inches.