Petos is a hip-hop artist from Helsinki, Finland. Nowadays Petos raps only in Finnish, but some of his earlier productions contained also English lyrics. Currently he is both a solo artist and a part of the rap group Kallio Underground with fellow Finnish rapper Jontti. Petos had his first touch with hip-hop at the end of the 80’s, when he heard Public Enemy on the radio. He started rapping in 1990, and back in those days he was called Master-A. He was also a member of the legendary rap group TOA (The Obstinate Age) under the name J. Dustin A.