Category comparison

Category comparison is used when you are comparing nominal data. For example names of people, departments or products. You are looking at only one moment in time. If you have multiple moments in time, you might want to, take a look at the time-charts. 

When visualizing the comparison of categories, try to place categories underneath each other. This makes reading the label easier, because it is horizontal. Also it will differentiate these charts from column charts that are used for time.