Android 4.2 is a version of the Android operating system, released by Google in November 2012. It introduced several new features, including a revamped notification system, which allowed users to respond to messages directly from the notification shade. This version also included support for multiple user accounts on tablets, enhancing the device's usability for families. Another significant addition in Android 4.2 was the Google Now feature, which provided personalized information and updates based on user preferences and location. Additionally, it improved the camera app with new photo features, such as the ability to take photos in burst mode and apply filters.