Stereo 8, commonly known as the eight-track cartridge,
, or simply eight-track, is a magnetic tape sound recording technology. It was popular in the United States from the mid-1960s through the late 1970s, but was relatively unknown in many European countries. Stereo 8 was created in 1964 by a consortium led by Bill Lear of Lear Jet Corporation, along with Ampex, Ford Motor Company, General Motors, Motorola, and RCA Victor Records (RCA).
In the U.S., eight-track cartridges were phased out of retail stores by late 1982. Some titles were still available as eight-track tapes through record clubs until late 1988. Many of these late-period releases are highly collectible because of the low numbers that were produced. Among the most rare is Stevie Ray Vaughan's Texas Flood. Another is Bruce Springsteen and the E Street Band's Live/1975-85, which was one of the very few boxed sets to be released on vinyl, cassette, compact disc, and eight-track tape. There is a debate among collectors about the last commercial eight-track released by a major label, but many agree it was Fleetwood Mac's Greatest Hits in November 1988.