The UK Albums Chart is one of many music charts compiled by the Official Charts Company that calculates the best-selling albums of the week in the United Kingdom.
[1][2][3] Before 2004, the chart was only based on the sales of physical albums.
The entry date is when the album appeared in the top ten for the first time (week ending, as published by the Official Charts Company, which is six days after the chart is announced).
The first new number-one album of the year was by Greatest Hits (1976-1978) by Showaddywaddy.
Overall, eighteen different albums peaked at number one in 1979, with ABBA, Blondie and Gary Numan each having two albums hit that position.