This document provides an overview of mobile operating systems including Android, BlackBerry, and iOS. It discusses the history and architecture of each system. Some key points include:
- Android was developed by Android Inc. which was later acquired by Google. It is an open source operating system built on top of the Linux kernel.
- BlackBerry OS is proprietary software that powered BlackBerry devices, known for their physical keyboards and integration with enterprise email systems.
- iOS powers Apple's iPhone, iPad, and iPod Touch. It is based on direct manipulation using touch gestures. Major versions are released annually.