This is a list of the world's best-selling albums of recorded music in physical mediums, such as vinyl, audio cassettes or compact discs. To appear on the list, the figure must have been published by a reliable source and the album must have sold at least 20 million copies and certified at least 10 million units. This list can contain any types of album, including studio albums, extended plays, greatest hits, compilations, various artists, soundtracks and remixes. The figures given do not take into account the resale of used albums. Certified copies are sourced either from available online databases of local music industry associations or a country with an established certifying authority.