The National Film Registry is a program enacted in 1988 that “works to ensure the survival, conservation and increased public availability of America”s film heritage.”
Each year the National Film Registration Board selects 25 films that are deemed “culturally, historically or aesthetically significant.”
The registry includes film juggernauts such as Citizen Kane, The Wizard of Oz and as of today, Shrek.
If selected by the board, the films are marked for preservation by the Library of Congress.