MS Excel
The Chart wizard term data categories refers to;

The organization of individual values with a chart’s data series
A chart plot area
A horizontal axis
The data range that supply chart data

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MS Excel
How do you delete a column?

Right click the column heading you want to delete and select delete from the shortcut menu
Select the column heading you want to delete and select Insert Delete from the menu
Select the row heading you want to delete and select Edit>Delete from the menu
Select the column heading you want to delete and select the Delete Row button on the standard toolbar

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