MS Excel
How do you select an entire column?

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

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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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