The Nook is an E-Reader from Barnes & Noble. It is based on the Android platform. Mainly there are only three differences between the Nook Wi-Fi and Wi-Fi/3G: connectivity, aesthetic, and weight.

NiMH is a type of rechargeable battery. mAh is the calculation of the energy that can be delivered by the battery.

The Maestro and the RoadMate are two different brands GPS devices and are prouduced by Magellan Navigation Inc. Both the brands boast various different models that offer a variety of features. Maestro is...

Alkaline batteries are dependent upon the reaction between zinc and manganese dioxide, whereas lithium batteries uses lithium metal or lithium compounds as anodes.

SMS sends a message phone to phone. IM send messages from computer to computer via the internet.