the chart below show the global markeet ratio of three computer operatng. systems compared to other from 2012 to 2015.

The chart illustrates a comparison for three computer operating system and other in the global market ratio over four years from 2012 to 2015. Overall, in three years of this period the Os 1 has most ration in the global market, and the minimum perception for all years over this period related to Os 3. […]