P16.D4 was a German electronic noise music collective, active primarily from 1980 to 1988, whose work was inspired by the punk and Neue Deutsche Welle (German New Wave) scene of the early 1980s, which they ruthlessly mocked in their debut self-released 7", "Brückenkopf Im Niemandsland". The group began as the relatively more musical Permutative Distortion, then morphing into P.D. to record one LP, Inweglos, before finally settling on P16.D4.