The four pie charts illustrate how the global market share was split between the three dominant computer operating systems and other competition from 2012 to 2015.
In general, it is clear that, with exception to the year 2012 where other systems accounted for the majority of shares, OS 1 was the most popular operating system globally. In contrast, OS 3 remained the least used operating system among the four listed across all four years.
Taking a closer look at the charts, it can be observed that OS 1 had a clear incremental rise in shares over the documented timespan. Starting from 2012, this OS made up 20% of the global market share, before skyrocketing to 52% in 2015, giving it a majority share. In contrast, systems grouped together as not being one of the big three saw a steep decline over the years, falling from being more popular than the three operating systems in 2012 at 48% of shares to just 15% by the end of the three year gap, making it the least dominant shareholder alongside OS 3.
Meanwhile, for OS 2, the amount of global shares it held consistently hovered at 17% for the first two years of the examined time span, rising by only an extra percent in 2014 and remaining static all the way to 2015. Additionally, OS 3 saw some fluctuations in its share of the global market during this period, dropping from 15% to 10% then jumping back up to 12% before finally going back to 15% between the four years.