Tomislav Uzelac is the Croatian programmer who wrote an amp MPEG audio decoder that is considered to be the first successful software MP3 player.
[2] Uzelac studied at the University of Zagreb's Faculty of Electrical Engineering and Computing (FER) under professor Mario Kovač, working on MP3 software decoding.
In order to manage AMP as a commercial product, Uzelac partnered with American media entrepreneur Brian Litman to form Advanced Multimedia Products "AMP".
Advanced Multimedia Products was later merged into PlayMedia Systems - also co-founded by Uzelac.
AMP was more widely marketed beginning in 1998 and facilitated world-wide MP3 popularization.