MS Excel
How do you select an entire column?

Click the column heading letter
Hold down the shift key as you click anywhere in the column
Hold down the Ctrl key as you click anywhere in the column
Select Edit > Select > Column from the menu

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MS Excel
Right clicking something in Excel:

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

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