To encourage the voluntary desegregation, districts started developing magnet schools to draw students to specialized schools all across their districts. Each magnet school would have a specialized curriculum that would draw students based on their interests.
Android holds the largest number of installed-base devices, with 1.9 billion in use in 2014, compared with 682 million iOS/Mac OS installed-base devices. Check out the link Android domination to continue in 2014; iPhone loses ground.
It's been reported that Snapchat has more than 100 million users. But that number may actually be closer to 200 million (or beyond), if you read between the lines of what's been written and stated by the company's executives. The company compares its size and scale internally to Facebook and Twitter.