IV as the Roman number for four may refer to: Led Zeppelin IV, the fourth album by Led Zeppelin containing the popular song "Stairway to Heaven" Atomic Rooster IV, the U.S. release of Atomic Rooster's fifth album, Nice 'n' Greasy IV (The Aggrolites album), the fourth album by The Aggrolites IV (Cypress Hill album), the fourth album of Cypress Hill IV (Diamond Rio album), a 1996 album by Diamond Rio IV (Faust album), also known as Faust IV, the fourth album by Faust IV (Godsmack album), the… (More on Iv)