US library to save Cosby recording
Bill Cosby's second comedy album and rapper Tupac Shakur's song Dear Mama are among 25 recordings the US Library of Congress is preserving for their cultural significance.
Selections for the National Recording Registry - which must be at least 10 years old and culturally, historically or aesthetically significant - are being announced this week.
Organisers chose Cosby's second album, I Started Out As A Child, over his first simply because they thought it was better overall, programme co-ordinator Steve Leggett said.
The organisers said Tupac's Dear Mama was a heartfelt homage to mothers struggling with addiction and poverty.
Tupac - who was shot and killed in 1996 - is the third rapper inducted, following Grandmaster Flash and Public Enemy.
Nominations come from a Library of Congress preservation board and online suggestions from the public.