"Hello World!" is a piece of contemporary classical music for clarinet-violin-piano trio composed by Iamus Computer in September 2011. It is arguably the first full-scale work entirely composed by a computer without any human intervention and automatically written in a fully-fledged score using conventional musical notation.[1][2][3] Iamus generates music scores in PDF and the MusicXML format that can be imported in professional editors such as Sibelius and Finale.