Android is a software stack for mobile devices that includes an operating system, middleware and key applications.
The Android SDK provides the tools and APIs necessary to begin developing applications on the Android platform using the Java programming language.
Android is a Linux-based operating system designed primarily for touchscreen mobile devices such as smartphones and tablet computers. Initially developed by Android, Inc., whom Google financially backed and later purchased in 2005,[9] Android was unveiled in 2007 along with the founding of the Open Handset Alliance: a consortium of hardware, software, and telecommunication companies devoted to advancing open standards for mobile devices.[10] The first Android-powered phone was sold in October 2008