The pie chart provides information about the percentages of three different computer operating systems global market rate comparasion to the other systems between the years 2012 and 2015.
Overall, it is clear that domination of the OS 1, OS 2 and OS 3 grew dramatically throughout the period. In contrary, other systems had fluctuated rates. Between three system, OS 1 has been maintained to have largest portion in all four years.
In 2012, with 20 percent OS 1 had second largest portion. However, it rose significantly and the peak was reached with 52 percent in 2015. In contrast, other systems fell sharply from 48% to a mere 23% from 2012 to 2015.
On the other hand, OS 2 remained relatively stable started from 17% to 18%. Similar to OS 2, OS 3 also protect the portion most of the time but in 2013 it had slight fall which receded to 10 percent.