"AC/DC" are an Australian hard rock group that was founded in Sydney around 1973 by brothers Malcolm and Angus Young. Their music is often referred to as "hard rock," and even associated with heavy metal, the group has always classified their material as simply "rock and roll". "AC/DC" worked through several changes in personnel before they even released their first album, High Voltage, in the year 1975.
The band was able to maintain their line-up until bass player Mark Evans was replaced by Cliff Williams in 1977. In 1979, the band entered the studio and came out with their hit album Highway to Hell. Lead vocalist and co-writer Bon Scott died in 1980, after a night of heavy drinking. The band briefly contemplated breaking up, but decided to continue on with singer Brian Johnson who is still with the group. The group's next album, Back In Black signaled their return and remains one of their most well-recognized albums.