The Official UK Charts Company

The Official Charts Company (previously known as the Chart Information Network (CIN) The Official UK Charts Company and also referred to Official Charts) is a British inter-professional organisation that compiles various "official" record charts in the United Kingdom, including the UK Singles Chart, the UK Albums Chart, the UK Singles Downloads Chart and the UK Album Downloads Chart, as well as genre-specific and music video charts. The OCC produces its charts by gathering and combining sales data from retailers through market researchers Millward Brown, and claims to cover 99% of the singles market and 95% of the album market, and aims to collect data from any retailer who sells more than 100 chart items per week.

The OCC is operated jointly by the British Phonographic Industry and the Entertainment Retailers Association (ERA) (formerly the British Association of Record Dealers (BARD)). Since 1 July 1997, CIN and then the OCC have compiled the official charts. Prior to this date, the charts were produced by a succession of market research companies, beginning with the British Market Research Bureau in 1969, and later by Gallup. Before the production of the "official" charts, various less comprehensive charts were produced, most notably by newspaper/magazine New Musical Express (NME) which began its chart in 1952; some of these older charts (including NME's earliest singles charts) are now part of the official OCC canon.

All of the OCC's charts are published weekly on Friday nights, and cover sales for the preceding week, Friday to Thursday. From 3 August 1969 until 5 July 2015, the chart week ran from Sunday to Saturday. Genre-specific charts include UK Dance Chart, UK Indie Chart, UK R&B Chart, UK Rock Chart and the Asian Download Chart. The Scottish Singles and Albums Charts ― and the former Welsh Singles and Albums Chart ― appears in listings within the Official Charts Company. It is a regional listing reflecting how sales towards the UK Singles Chart and UK Albums Chart are faring in Scotland. The Welsh Singles and Album Chart served the same purpose in Wales. It also charts the UK DVD Chart and UK Budget Album Chart. While their music charts are now Friday to Thursday, their video charts remain Sunday to Saturday.

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