Band 7+: Topic: The charts below show the global market ratio of three computer operating systems compared to others from 2012 to 2015. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The given pie charts compare different versions of three computer operating systems (OS) on the international market from 2012 to 2015.

Overall, there was a drastic change in the market share for OS 1 and Others, while OS 2 and OS 3 stayed relatively stable. Although Others started with the highest figure, OS 1 overtook it and became the best-selling version by the end of the period.

Regarding the operating systems with the most significant change,in 2012 the Others category was predominant on the market, at approximately 48%. OS 1 accounted for only half of that figure, at 20%. By 2014, OS 1 gained popularity, accounting for 48% of the market, whereas the percentage for Others dropped significantly to 23%. In 2015, at 52%, OS 1 became the best-selling version on the global market, while Others had the lowest recorded figure, at 15%.

With regard to the relatively stable operating systems ,in 2012 OS 2 stood at 17%, compared to 15% for OS 3. The statistics underwent only minor changes, with OS 3 remained at 15% over the three-year period and OS 2 rising slightly to 18%.