“Lennon/McCartney” is one of music’s greatest songwriting credits, a catchall that covered most of the Beatles’ tracks and was employed even when John Lennon and Paul McCartney didn’t collaborate on a certain song. However, although arranged alphabetically, the ensuing decades have favored Lennon’s placement in the songwriting credit, suggesting that Lennon had…

Source: RollingStone
Link: Paul McCartney Talks Nixed 'McCartney/Lennon' Songwriting Credit