ABC is an English pop band that originated in Sheffield in 1980, evolving from the earlier ensemble Vice Versa. The band's classic formation featured Martin Fry as the lead vocalist, Mark White on guitar and keyboards, Stephen Singleton playing the saxophone, and David Palmer behind the drums.

Vice Versa are an electronic band that formed in Sheffield, England, in 1977. Vice Versa originally consisted of Stephen Singleton, Mark White, Ian Garth, and David Sydenham, the former two of whom would go on to later found the successful 1980s pop band ABC. The band was active from 1977 to 1980 with the aforementioned line-up, and reformed in 2015 without Garth and Sydenham. Vice Versa are considered one of the "Big Four" late-1970s minimalistic electronic/synth-based bands from Sheffield. They share this title with Cabaret Voltaire, Clock DVA and the Human League.