The pie charts delineate how the global market ratio of three computer operating systems evolved between 2012 and 2015.
At first glance, there was an upward trend in both the percentage of computer running Os 1 and Os 2 in global market while the reverse was true for others. In addition, the figure for Os 3 consistently had by far the lowest data throughtout the period.
The proportion of computer operating Os 1 started at 20% in 2012, after which it witnessed a dramatic decrease to 38% in 2013, before significantly dropping to 47% in 2014 and ending at 15% in the following year. Similarly, the data for Os 2, but to a lesser extend, rose from 17% in 2012 which was as high as the rate of 2013 to 18% in both 2014 and 2015.
Regarding the remaining categories, 23% of computer running other systems decreased, with a subsequent drop to 35% in 2013, before considerable declining to 23% (2014) and ending at only 15% (2015). Noticeably, those which operated Os 3 made up 15% in 2012, followed by a marginal shrink to 10% in 2013 then recovering back to 12% and 15% in 2014 and 2015 accordingly.