The pie charts illustrate the gobal market ratio of four computer operating and other for 2012 to 2015. Overall, in four years each section changed a lot.
In 2012, the others take the half of chart and the the other half was divided in three, OS1, OS2 and OS3 it was speraded equally. In the 2013, others was sharply decline, while OS3 a bit increased. OS1 and OS2 was not move and stay at the same level.
In 2014, 0S3 started to rose and take the second largest section after others which decreasing every year but stay the largest one. OS1 and OS2 compare the two last years increased for little bit. In 2015, the largest section there was was a OS3 and now the second one are others. OS1 and OS2 sharply rose in one year and show a excellent result.
