Apple Jam is the third LP (often described as a "bonus" disc) included in English rock musician George Harrison's 1970 triple album All Things Must Pass. It consists of four instrumental jams, three of which were recorded during the album sessions, and "It's Johnny's Birthday", a 30th birthday tribute to John Lennon. The disc was Apple Records' way of placating record buyers for the high retail price of All Things Must Pass, which was one of the first triple albums in rock history. It was given a dedicated design by Tom Wilkes, with a logo depicting a jam jar and apple leaves.
en.wikipedia.org/wiki/Apple_Jam