Most famous Tablet PC

Apple iPad

-iOS 4
-9.7 inch
-2 products(wi-fi , wi-fi + 3G)
-16,32 or 64 GB capacity memory
-1GHz Apple A4 custom-designed,high-performance,low-power system-on-a-chip

Blackberry Playbook

-QNX Neutrino
-7 inch
-Dual HD camera(3 MP front,5 MP back),support 1080p HD video recording
-1 GHz dual-core
-1 GB RAM

Samsung Galaxy Tab

-Android OS,v2.2 (Froyo)
-7 inch
-Dual camera(1.3 MP front,3.15 MP back)
-ARM Cortex A8,1GHz
-16,32 GB storage
-512 MB RAM