This output control line is used to select which side of a two-sided floppy disk is to be used for reading or writing.

[…]it sall be lesum to quhatsumewir personne apprehendand the said swyne in thair awin skaytht, or thair nichtbouris skaytht, or vpon the commountie of Castelhill, Womanhill, Kirkyard, or Linx vertand the ertht, to distroy the samen[…].

The allergy medicine palpitates my heart.

The hurricane leveled the forest.