Pick a major online retailer (e.g., Amazon, Walmart, or Sears). Examine the default browser- based shopping interface from the following devices: a desktop computer with a large monitor, a tablet computer, and a smartphone. How and why do content and layout vary across the devices? Are there any device specific technologies employed in any of the interfaces, such as voice recognition, multitouch gestures, and gaze (eye) detection? Is a shopping app available for any of the devices? If so, how does the apps user interface differ from browser-based shopping on the same device?