MS Excel
Right clicking something in Excel:

Deletes the object
Nothing the right mouse button is there for left handed people
Selects the object
Opens a shortcut menu listing everything you can do to the object

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MS Excel
How do you delete a column?

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

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