Credits are traditionally used in various forms of media to provide attribution to the people involved in producing it. It is commonly found in films, television programs, and video games. While opening credits will usually display only the major positions in a production's cast and crew (such as creators, producers, and lead actors), closing credits will typically acknowledge all staff members that were involved in the production.

Opening credits

The opening credits, in a television program, motion picture, or video game, are shown at the beginning of a show or movie after the production logos and list the most important members of the production. They are usually shown as text. Some opening credits are built around animation or production numbers of some sort (such as the James Bond films). Opening credits mention the major actors; the lead actor is prominent, and the supporting actors follow. Others that are listed are guest stars, producers and director (also editor if a different person), as opposed to closing credits, which list the entire production crew.

In a motion picture, television program or video game, the opening credits or opening titles are shown at the very beginning and list the most important members of the production. They are now usually shown as text superimposed on a blank screen or static pictures, or sometimes on top of action in the show. There may or may not be accompanying music. When opening credits are built into a separate sequence of their own, the correct term is a title sequence (e.g., the familiar James Bond and The Pink Panther title sequences).

Opening credits since the early 1980s, if present at all, identify the major actors and crew, while the closing credits list an extensive cast and production crew. Historically, however, opening credits have been the only source of crew credits and, largely, the cast, although over time the tendency to repeat the cast, and perhaps add a few players, with their roles identified (as was not always the case in the opening credits), evolved. The ascendancy of television movies after 1964 and the increasingly short "shelf-life" of films in theaters has largely contributed to the credits convention which came with television programs from the beginning, of holding the vast majority of cast and crew information for display at the end of the show.

In movies and television, the title and opening credits may be preceded by a "cold open", or teaser (in other words, a brief scene prior to the main acts), that helps to set the stage for the episode or film.

History in cinema Up until the 1970s, closing credits for films usually listed only a reprise of the cast members with their roles identified, or even simply just said "The End", requiring opening credits to normally contain the details. For instance, the title sequence of the 1968 film Oliver! runs for about three-and-a-half minutes, and while not listing the complete cast, does list nearly all of its technical credits at the beginning of the film, all set against a background of what appear to be, but in fact are not, authentic 19th-century engravings of typical London life. The only credit at film's end is a listing of most of the cast, including cast members not listed at the beginning. These are set against a replay of some of the "Consider Yourself" sequence.

Some opening credits are presented over the opening sequences of a film, rather than in a separate title sequence. The opening credits for the 1993 film The Fugitive continued intermittently over several opening scenes, and did not finish until fifteen minutes into the film. The opening credits for the 1968 film Once Upon a Time in the West lasted for fourteen minutes.

The first sound film to begin without any opening credits was Walt Disney's Fantasia, released in 1940. In the film's general release, a title card and the credit "Color by Technicolor" were spliced onto the beginning of the film, but otherwise there were no credits, although closing credits were added to the 1990 re-release and are on the videocassette. This general release version has been the one most often seen by audiences. In the roadshow version of the film, unseen by most audiences until its DVD release, the title card is seen only at the halfway point of the film, as a cue that the intermission is about to begin. The intermission was omitted in the general release version.

Orson Welles' Citizen Kane begins with only a title credit. This practice was extremely uncommon during that era.

West Side Story (1961) begins with a shot of an ink sketch of the New York City skyline as it was when the film was made. As the background of the shot changes color several times, we hear an overture medley (not in the original show) of some of the film's songs. As the overture ends, the camera pulls back and we see the title of the film. The rest of the credits are shown as graffiti at the end.

Most Disney films released between 1937 and 1981 had all the film-related information in the opening credits, while the closing consisted only of the credit "The End: A Walt Disney Production or Walt Disney Productions". 1964's Mary Poppins was the first Disney film to have longer closing credits, in which all the principal cast members (and the characters that they played) were listed.

Most Soviet films presented all film-related information in the opening credits, rather than at the closing which consisted of only a "THE END" (, Konyets Fily-ma) title. A typical Soviet opening credits sequence starts with a film company's logo (such as Mosfilm or Lenfilm), the film's title, followed by the scenarist (the Soviet Union considered the scriptwriter the principal "auteur" of its films), followed by the director, usually on separate screens, then continuing with screens showing other credits, of varying number, and finally, the film's chief administrator-in-charge, the production director (, Direktor kartiny). Following this came the cast, usually in actor-and-role format for all principal and major featured players, and perhaps then a screen only naming, in an alphabetical cluster, some additional character players. The final credit screen identified the studio corresponding to the logo at the beginning, and the year of the film's production. It could also contain the frame with the technical information about the cinematographic film manufacturer (e.g., Svema).

This basic method was also followed in most American films from the 1930s through the late 1980s. American films also tended to list the names of the actors before the names of the directors, screenwriters, and other principal crew members. Exceptions were made in the films of director Frank Capra, whose name was usually billed before the film's title. Director Victor Fleming's name was also billed before those of the actors in films such as The Wizard of Oz, Dr. Jekyll and Mr. Hyde and Joan of Arc. Capra, Fleming, and James Whale were some of the few directors who received the credit "A [director's name] Production" even though they did not produce their films.

François Truffaut's 1966 film Fahrenheit 451 uses spoken opening credits instead of written ones, in keeping with the film's story of a world without reading matter, as well as Jean-Luc Godard's Contempt of 1963.

George Lucas is credited with popularizing films without opening credits with his Star Wars films, which display only the film's title at the start followed by the films' signature opening crawl. His decision to omit opening credits in his films Star Wars (1977) and The Empire Strikes Back (1980) led him to resign from the Directors Guild of America after being fined $250,000 for not crediting the director during the opening title sequence. However, Hollywood had been releasing films without opening credits for many years before Lucas came along, most notably Citizen Kane, West Side Story, 2001: A Space Odyssey and The Godfather.

"Title-only" billing became an established form for summer blockbusters in 1989, with Ghostbusters II, Lethal Weapon 2 and The Abyss following the practice. Clint Eastwood has omitted opening credits (except for the title) in every film that he has directed since approximately 1982.

By the 2000s, many major American motion pictures had done away with opening credits, with many films, such as Van Helsing in 2004 and Batman Begins in 2005, not even displaying the film title until the closing credits begin. Yet, although minimalist (or absent) opening title sequences have become the norm in the 2000s, not all films have followed this trend, and many complex and creative examples can still be found. Among these, retro title sequences, which echo the styles of previous eras, have proved a popular design choice.

Credit only

With regard to television series, it is now an accepted practice to credit regular cast members for every episode of a season, even if they did not appear in each episode. One example is the American television series Nip/Tuck, in which the appearance of all credited characters is rare. Another television series that credited all regulars for a season in every episode (regardless of whether or not they appeared) was Lost, most notably from season two onward, in which the complete credited cast appeared in only two episodes out of 23. During Losts fourth season, Harold Perrineau was credited for all thirteen episodes, despite only having appeared in five of them (fewer than some guest stars, such as Jeff Fahey).

The series Charmed also began by crediting every regular cast member even if they did not appear in the episode. The season two episode "Morality Bites" is the only episode in which only the three leading actresses were credited, and later the male cast members were only credited in the episodes in which they appeared. If a regular actor was not featured in that particular episode, the opening credits were edited with their images omitted and the actors not being credited.

The television series Police Squad!, in keeping with its parodic nature, featured a character who only appeared in the credits ("...and Rex Hamilton as Abraham Lincoln").

Soap operas Traditionally, actors in daytime soap operas are not credited in the episode opening sequences; this has been the case because of the escapist tone of the soap opera genre and as such, producers of soaps did not want cast members credited in the opening sequence in order to keep this intact. The drawback to this is that cast members are often identified by fans as their soap opera personas and not as themselves, as opposed to actors on other television programs who, in many cases, were identifiable by their own name.