Released in 1975, Radio-Activity (Radio-Aktivitat) was the fifth studio album by Kraftwerk. This was the group's first entirely electronic album and a concept album dealing with the theme of radio communication.
Released in 1978, The Man-Machine (Die Mensch-Maschine) is the seventh studio album by Kraftwerk. The album saw the group incorporate more danceable rhythms and less minimalistic arrangements. Singles includ "The Model" and "The Robots."
Released in 1977, Trans-Europe Express (Trans Europa Express) is the 6th studio album by Kraftwerk. The group were refining their melodic electronic style with a focus on sequenced rhythms, minimalism, and occasionally manipulated vocals.