Google recently announced the newest version of its mobile operating system, Android 5 Lollipop. Here's a look back at Android versions over the years.
The Android operating system made its debut as a Google property in late 2008 on the T-Mobile G1. This version was known as Android 1.0, and was lauded for its pull-down notification system. Android 1.1 was released early 2009 and mostly dealt with bug fixes and minor improvements. Android 1.0 was also known as "Alpha," and Android 1.1 was also known as "Beta."