This is a list of available actual and physical albums belonging to the UK Now That's What I Call Music! series, comprising: compact discs (CD), audio cassettes (AC), vinyl (LP), VHS tape, DVD, and on other short-lived formats. They are categorised by series (country), then ordered by date. United Kingdom and Ireland Initially only released on vinyl and audio cassette, the first Now That's What I Call Music UK edition to be released on compact disc (CD) was Now That's What I Call Music! 4 in a single-CD format in 1984, although it was a compilation of tracks from all four Now That's What I Call Music vinyl/cassette albums up to that point. Further single-CD versions of Now That's What I Call Music! 8 and Now That's What I Call Music! 9 followed, with full double-disc CD releases starting with Now That's What I Call Music! 10 in November 1987. Phonograph record production ended on the numbered series with Now That's What I Call Music! 35, with special vinyl editions of spin-offs like Now That’s What I Call Punk & New Wave (on a double neon pink vinyl set) editions in the 21st century. Audio cassettes ended with Now That's What I Call Music! 64. Part of the series was also released on the MiniDisc format, beginning with Now That's What I Call Music! 43 and ending with Now That's What I Call Music! 48. Volumes 1 to 18 and Now That's What I Call Music! 20 were released on individual VHS tapes, with the first two albums also issued on LaserDiscs. Every video tape had a typical running time of roughly one hour. From 2001 to 2007, the videos were published on DVD with a frequency of one per year. The DVDs are numbered by year and not linked to album numbers. Now 2006 was released on UMD as well as DVD. The series release dates below represent the date of release in the United Kingdom. Up until the release of Now That's What I Call Music! 90 on 30 March 2015, the release date in Ireland was three days before the UK release. Beginning with the release of Now That's What I Call Music! 91 on 24 July 2015, the release dates in the UK and Ireland have been the same following the announcement of the Global Release Day campaign by IFPI, which became effective on 10 July