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.
This statistic gives information on the number of available apps in the Apple App Store since July 2008. As of January 2017, 2.2 million mobile apps were available to download for various iOS devices.