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 pie charts show the share of the global market of three computer operating systems compared to other systems from 2012 to2015. Overall, the proportion in 2013, 2014 and 2015 is higher at operating system one , than at 2012 year , 2012 shares most in other types of operating systems. Also, operating system two […]