What are the differences between stable and permanent transfection/transduction?

Transfection is the process of introducing nucleic acids into cells. With transduction, nucleic acids are introduced into the cell specifically by means of a viral vector. The expression of genetic material from these two methods can either be transient, where the cell does not incorporate the foreign gene into its genome, or stable, where it is incorporated into the genome. Stable transfection/transduction can also be called permanent transfection/transduction.