Oi! is a style of punk rock with pure treble-tone guitars, heavy bass, energetic drums and vocals usually chanted, sang or spoken. Sometimes it had guitar solos and songs were usually short. It began in the 1970s in UK with bands like Skrewdriver (early), The exploited, 4-skins, The Business and Cockney Rejects. It began with skinheads but more traditional and SHARP skins.