title: how can we use USER-AGENT string to differentiate between 1.Laptop/Desktop 2.IOS 3. Android 4.Other handsets (BB, Nokia, MS Mobile)
body: <p>I want specific keys so that i can make a distinction between the devices using user-agent string.
  1.       Laptop/Desktop
  2.       IOS
  3.       Android
  4.       Other handsets (BB, Nokia, MS Mobile)</p>