Google is starting to shut Android's open door.
As reported by Bloomberg Businessweek, Google has begun to crack down on the way developers can use and access their "open-source" Android software.
At its inception in 2008, Android's open-source nature meant that after Google created the code, hardware and software makers could freely use and customize the result. But in recent months, Google has instated new rules that limit the way companies can use Android.
