8-track tape (formally
Stereo 8: commonly known as the
eight-track cartridge,
eight-track tape, or simply
eight-track) is a
magnetic tape sound recording technology popular in the United States from the mid-1960s to the late 1970s when the
Compact Cassette format took over. The format is regarded as an obsolete technology, and was relatively unknown outside the United States, the United Kingdom, Canada and Australia.