AC/DC are an Australian rock band, formed in Sydney in 1973 by brothers Malcolm and Angus Young. Their music has been described by music journalists as hard rock, blues rock, and controversially, heavy metal, although the group have called themselves "a rock and roll band, nothing more, nothing less".

The band's next album, For Those About to Rock We Salute You, was their first album to reach number one in the United States. The band fired Phil Rudd as drummer in 1983, and ex-A II Z drummer Simon Wright filled in Rudd's place. In 1989, Wright would himself leave the band so he could join Dio. The band experienced a resurgence in the early 1990s with the release of The Razors Edge. Phil Rudd returned in 1994 after Chris Slade, who had been with the band from 1989 to 1994, was asked to leave in his favour, and contributed to the band's 1995 album Ballbreaker. Stiff Upper Lip, released in 2000, was well received by critics. The band's studio album Black Ice, released in 2008, was the second highest-selling album of that year, and their biggest chart hit since For Those About to Rock, eventually reaching No.1 on all charts worldwide. The band's line-up remained the same until 2014 with Malcolm Young's retirement due to early-onset dementia and Rudd's legal troubles. In 2016, Johnson was advised to stop touring on due to worsening hearing loss, and Guns N' Roses frontman Axl Rose stepped in as the band's vocalist for the remainder of that year's dates. Long-term bass player and background vocalist Cliff Williams retired from the band at the end of their 2016 Rock or Bust world tour.

AC/DC have sold more than 200 million records worldwide, including 71.5 million albums in the United States, making them the tenth highest-selling artist in the United States and the 14th best selling artist worldwide. Back in Black has sold an estimated 50 million units worldwide, making it the third-highest-selling album by any artist – and the highest-selling album by any band. The album has sold 22 million units in the US, where it is the sixth-highest-selling album of all time. AC/DC ranked fourth on VH1's list of the "100 Greatest Artists of Hard Rock" and were named the seventh "Greatest Heavy Metal Band of All Time" by MTV. In 2004, AC/DC ranked No. 72 on the Rolling Stone list of the "100 Greatest Artists of All Time". Producer Rick Rubin, who wrote an essay on the band for the Rolling Stone list, referred to AC/DC as "the greatest rock and roll band of all time". In 2010, VH1 ranked AC/DC number 23 in its list of the "100 Greatest Artists of All Time".