London, Mar 22: Pink Floyd's 'The Dark Side of the Moon' and Simon and Garfunkel's 'Sounds of Silence' are to seal their place in history at the US Library of Congress as part of its National Recording Registry.
Joining them will be Chubby Checker's 1960's dance hit The Twist, the BBC reported.
Each year, 25 "culturally" or "historically" significant recordings are added to the registry, established in 2000.
Art Garfunkel, 71, said he was thrilled and flattered to have his work preserved.
His song 'The Sound of Silence', written after the assassination of President Kennedy in 1963, initially flopped, only becoming a hit after it was re-edited.
Its subsequent success prompted the duo to reunite and record another album entitled 'Sounds of Silence' in 1966, which Garfunkel said was a life changer for him and his partner, Paul Simon.
'The Dark Side of the Moon' received the highest number of public nominations for this year's registry.
Other recordings chosen include the soundtrack to the popular 1977 movie 'Saturday Night Fever', starring John Travolta and featuring the Bee Gees, which revived the disco craze and the original 1949 cast album for South Pacific.
The classical pianist Van Cliburn's Cold War performance when he won the prestigious Tchaikovsky International Piano Competition at 23 also was selected. (ANI)