MP3audio format
"MP3 is a popular digital audio encoding and lossy compression format invented and standardized in 1991 by a team of engineers working in the framework of the ISO/IEC MPEG audio committee under the chairmanship of Professor Hans Musmann (University of Hannover - Germany). In popular usage, MP3 also refers to files of sound or music recordings stored in the MP3 format on computers." (Wikipedia Entry on MP3, Full Article)