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compilation producer Bill Levenson
design [package design] Bob Defrin
tracks 1-1 to 1-6 engineer Brian Foraker
tracks 1-10 to 1-12, 2-1, 2-2, 2-4, 2-6, 3-1, 3-3, 3-7 to 3-9, 4-7 engineer Eddy Offord
tracks 1-1 to 1-6 engineer [assistant] Roger Sommers
tracks 1-1 to 1-6 mastered by Greg Fulginiti
mastered by Joseph M. Palmaccio
tracks 1-8 to 1-12, 2-1 to 2-4, 2-6, 3-1 to 3-4. 3-6 to 3-10, 4-1, 4-2, 4-4, 4-9 producer Greg Lake
tracks 1-1 to 1-6 producer, engineer Keith Olsen
Released in large 30-cm-long box that contains four CDs in standard jewel cases and a 35-page booklet with track information, archive photographs and an essay by Chris Welch.

1-1 to 1-6 are new recordings. Track 1-6 is presented in Dolby Surround Sound.
2-7, 3-6 and 4-7 are previously unreleased.
1-11, 1-12, 2-4 and 3-1 from Emerson, Lake & Palmer.
2-1, 3-7 and 3-8 from Tarkus.
1-10, 2-2, 2-6, 3-3 and 3-9 from Trilogy
1-9, 2-2, 3-10 and 4-1 from Brain Salad Surgery.
2-3 from Welcome Back My Friends To The Show That Never Ends.
3-4, 3-5, 4-5 and 4-9 from Works Volume 1.
1-8, 3-11, 4-4 from Works Volume 2.
1-7 from Works Live.
4-6 and 4-8 from Love Beach.
4-3 and 4-10 from Black Moon.