Napster was an American proprietary peer-to-peer (P2P) file sharing application primarily associated with digital audio file distribution. Founded by Shawn Fanning and Sean Parker, the platform originally launched on June 1, 1999. Audio shared on the service was typically encoded in the MP3 format. As the software became popular, the company encountered legal difficulties over copyright infringement. Napster shut down in 2001 following a series of lawsuits and subsequently filed for bankruptcy in June 2002.
https://en.wikipedia.org/wiki/Napster