M.U.: The Best of Jethro Tull

M.U. - The Best of Jethro Tull, released in 1976, is the first proper greatest hits album by Jethro Tull. It spans the years 1969-75. The earlier Living in the Past compilation mainly dealt with non-album material, but this album only features one previously unreleased song, "Rainbow Blues". "M.U." in the album title stood for "Musician's Union", which probably is a reference to musicians from different line-ups of the band being virtually together on the compilation album. The album peaked at number 44 in the United Kingdom charts and number 13 in the United States, and went gold in the UK, Australia and New Zealand and Platinum in the US and Canada.