Android is an open-source, Linux-based operating system originally developed by Android Inc. and later acquired by Google. It is designed primarily for touchscreen smartphones and tablets. While Android aims to be an open platform, Google does not disclose all the code and intends to dominate mobile advertising as it has done for web. Key demographics of Android users are males aged 18-44 who use their phones frequently for emails, games like Angry Birds, and multi-tasking multiple apps.