The <strong>Stacked Bar Chart</strong> displays individual data value contribution of a total 
across categories. Categories are organized horizontally and values vertically. This chart 
type is know also as <strong>Stacked Column Chart</strong>.
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The <strong>Horizontal Stacked Bar Chart</strong> is similar to a stacked bar chart as it also 
illustrates individual data value contribution of a total across categories. However, categories 
are organized vertically and values horizontally. In a horizontal stacked bar chart, each 
data point is represented as a horizontal column. The advantage in using a 
<strong>Horizontal Stacked Bar Chart</strong> is that the category labels may be easier to read.
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Both chart types of  are suitable for presenting discrete data.