At almost every Grateful Dead show, it was common to see fans openly recording the music for later enjoyment. This can be traced to shows in the late 1960s, with the number of tapers increasing yearly. In 1971, Les Kippel, from Brooklyn, New York, started the First Free Underground Grateful Dead Tape Exchange. The purpose of "The First Free Underground Grateful Dead Tape Exchange" was to preserve the heritage of the Grateful Dead's concert history by exchanging copies of recorded tapes made from audience members. This started a new era in recording, collecting, and trading Grateful Dead tapes. Often referred to as the "Original Napster", the tape exchange grew into an international movement that continues today.