Band 6+: The charts below illustrate the global market share of three computer operating systems (OS) compared to other systems from 2012 to 2015. Provide an overview of the information by identifying and describing the key details, and include comparisons where appropriate.

The chart illustrates world market allocation of three various computer operating systems over 4-years period spanning 2012 to 2015.

Overall it is clear that, there were upward and downward trends in all sessions. However, OS 1 dominated the chart whereas OS 3 illustrated lowest figure in all years. Additionally, OS 2 remained relatively stable over the years, while others showed different figures in each year.

Focusing on OS 1 and Others, in 2012 other allocated highest market share accounting 48% while OS 1 was least shared with 20%. This was distantly followed by dramatic increase to 35% and 38% in 2013 respectively. Starting at around 23% and 47% 2014, the figures that then decreased and increased accounting 15% others and 52% OS1 in 2015.

Turning to the OS 3 and 2, in 2012 OS 3 had the lowest global market share accounting 15%. Despite a decrease to 10% in 2013, the global market share of OS 3 grow up to 12% in 2014. This was closely followed by noticeable increase to 15% in 2015. Additionally, OS 2 remained relatively stable in all years accounting 18%.