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About Rio
Rio was a line of digital audio players and related audio products. Its first release, the Rio PMP300 digital music player, released by Diamond Multimedia in 1998, was one of the earliest notable and commercially successful devices in its category. It also became known as the target of an early lawsuit regarding the legality of such devices. Following the PMP300, various music players were released under the Rio brand name by a number of companies until the brand was retired in 2005.
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