Every December, Library of Congress name 25 motion pictures—Hollywood classics, documentaries and innovative shorts—to the National Film Registry of the Library of Congress to be preserved for ever. These films are not selected as the "best" American films of all time, but rather as works of enduring significance to American culture.

Annual selections to the registry are finalized by the Librarian after reviewing hundreds of titles nominated by the public (this year 2,112 films were nominated).

Not in any particulare order:

1.Airplane (1980)
"Airplane!" emerged in 1980 as a sharply perceptive parody of the big-budget disaster films that dominated Hollywood during the 1970s.

2.All the President’s Men (1976)
Based on the memoir by Washington Post reporters Bob Woodward and Carl Bernstein about political dirty tricks in the nation’s capital.

3.The Bargain (1914)
After beginning his career on the stage, William S. Hart found his greatest fame as the silent screen’s most popular cowboy.

4.Cry of Jazz (1959) : Documentry

5.Electronic Labyrinth: THX 1138 4EB (1967)
This 15-minute film, produced by George Lucas while a student at the University of Southern California, won the 1968 United States National Student Film Festival drama award and inspired Warner Bros. studio to sign Lucas to produce the expanded feature length "THX 1138".

6.The Empire Strikes Back (1980)
The much anticipated continuation of the "Star Wars" saga, Irvin Kershner’s 1980 sequel sustained the action-adventure and storytelling success of its predecessor.

Exorcist (1973)
"The Exorcist" is one of the most successful and influential horror films of all time.

8.The Front Page (1931)
"The Front Page" is a historically significant early sound movie that successfully demonstrates the rapid progress achieved by Hollywood filmmakers in all creative professions after realizing the capabilities of sound technology to invent new film narratives.

9.Grey Gardens (1976): Documentary

10.I Am Joaquin (1969): Documentary

11.It’s a Gift (1934)
"It’s a Gift" has survived a perilous preservation history and is the third Fields film to be named to the National Film Registry.

12.Let There Be Light (1946)
Director John Huston directed three classic war documentaries for the U.S. Army Signal Corps during the period of 1943-46: "Report from the Aleutians," "Battle of San Pietro" and "Let There Be Light."

13.Lonesome (1928)
The film has been recognized for its success as both a comic melodrama and for its early use of dialogue and two-color Technicolor.

14.Make Way For Tomorrow (1937)
"Make Way for Tomorrow" is a sensitive, progressive, issue-oriented Depression-era film by director Leo McCarey.

15.Malcolm X (1992)
Director Spike Lee’s biographical film about the life of civil rights leader Malcom X was produced in the classical Hollywood style.

16.McCabe and Mrs. Miller (1971)
"McCabe and Mrs. Miller" is an aesthetically acclaimed film that demonstrates why the Western genre endured in the 20th century as a useful model for critically examining the realities of contemporary American culture.

17.Newark Athlete (1891) :Experimental film
18.Our Lady of the Sphere (1969) :Animation

19.The Pink Panther (1964)
Blake Edwards introduced both the animated Pink Panther character in the film’s opening-and-closing credit sequences, and actor Peter Sellers in his most renowned comic role as the inept Inspector Clouseau.

20.Preservation of the Sign Language (1913) ocumentry

21.Saturday Night Fever (1977)
Produced long after the heyday of classic Hollywood musicals, this cinematic cultural touchstone incorporated set-piece music and dance numbers into a story of dramatic realism.

22.Study of a River (1996) :Experimental
23.Tarantella (1940) [/b] :Experimental

24.A Tree Grows in Brooklyn (1945)
Elia Kazan’s first feature film, based on the novel by Betty Smith, focuses on a theme that he returned to many times during his film career: the struggle of a weak or ill-prepared individual to survive against powerful forces.

25.A Trip Down Market Street (1906)
"A Trip Down Market Street" is a 13-minute "actuality" film recorded by placing a movie camera on the front of a cable car as is proceeds down San Francisco’s Market Street.