The pie charts give information about the percentages of three computer OS surveyed in 4 years 2012, 2013, 2014, and 2015.
Overall, OS 1 gained more popularity over the period, while other operating systems underwent an opposite pattern. Additionally, OS 2 witnessed the least fluctuation among the four categories.
In 2012, only 20% of computer users chose OS 1; however, this figure then increased notably and reached 52% in 2015. For other computer OS, their figures started at 48%, being the most popular in 2012. Nonetheless, the proportion of people using other OS for the computer reduced sharply to only 15% over the period.
Meanwhile, OS 2 was used by 17% of computer users in 2012, followed by a modest rise of 1% in 2014, and remained at that figure in 2015. The percentage of people who use OS 3 was 15% at the beginning of the period, after which it fell by 5% in the following year. However, the figure for OS 3 increased again to its initial state of 15% in 2015.
