ViewSonic is showcasing their Viewpad 100 tablet device with a 10.1-inch display, dual-boot Windows 7 Home Premium and Android 1.6 operating systems, and Intel’s Atom processor.

Besides the multi-touch 1024×600 LED-backlight screen and Atom N455 at 1.66GHz, the “world’s first dual boot tablet” comes with 16GB of internal storage, which is expandable via a Micro SD slot, 1GB DDR3 RAM, a 1.3MP web camera on the front, Wi-Fi, a SIM card slot, Bluetooth, assisted GPS, two USB 2.0 ports, a mini VGA video output connector, and a built-in accelerometer.

The pre-production unit at ViewSonic’s IFA booth has a battery life of about 4 hours in Windows and from 6 to 8 hours in Android.

The ViewPad 100 is expected to hit the market in October for about $650 Euros ($845 US dollars).

ViewSonic has also released the 7-inch ViewPad 7 that runs Android 2.2.

ViewSonic has unveiled the Android OS-based ViewPad 7 multitouch tablet at the 2010 IFA Show in Berlin.

The 7-inch ViewPad 7 runs Androdid 2.2 with access to the Google Android app marketplace and provides 3G phone, augmented reality, navigation, and ebook reading functionality, besides Internet and multimedia capabilities.

It uses a 600MHz Qualcomm “Snapdragon” processor and has a Micro SD slot for up to 32GB of storage capacity, a front VGA and back-facing 3.2MP camera, stereo speakers, a full-size SIM card slot, Wi-Fi, integrated Bluetooth, Assisted GPS, built-in accelerometer, a mini-USB port, and an audio connector.

The LED-backlight display has a resolution of 800 x 480 pixels.

ViewSonic’s Viewpad 7 will be available starting in October for about $399 Euros ($514 US dollars).

The company is also going to release the 10-inch ViewPad 100.