A last is a form in the approximate shape of a human foot, used by shoemakers and cordwainers in the manufacture and repair of shoes. Lasts typically come in pairs, and throughout their history have been made from many materials, including hardwoods, cast iron, and, more recently, high density plastics.

Lasts are made to varying degrees in the shape of the human foot, depending on their specific purpose. They come in many styles and sizes, depending on the exact job they are designed for. They range from simple one-size lasts used for repairing soles and heels, to hard-wearing lasts used in modern mass production, and to custom-made lasts used in the making of bespoke footwear.

Historically, lasts were made from a number of materials - typically hardwoods and cast iron. These are materials that will retain their shape, even when in contact with wet materials, like leather, being stretched and shaped.

The material used to make modern lasts must be strong enough to withstand the forces of mass production machinery, such as that applied by the pullover machines when bottoming the shoe, and must also be able to hold tacks (known as "lasting tacks") which are used to hold shoe parts together temporarily before the sole is added. Although hardwoods satisfy these criteria, modern lasts, especially those used by mass production factories in places such as China, are often made from high-density polyethylene plastic (HMW-HDPE), which allows for many tack holes before needing repair. Such plastics also have the benefit that they can be recycled and remoulded when they wear out.

Las Vegas (/lɑːs ˈveɪɡəs/) is the most populous city in the U.S. state of Nevada and the county seat of Clark County. Las Vegas is an internationally renowned major resort city for gambling, shopping, and fine dining. The city bills itself as The Entertainment Capital of the World, and is famous for its consolidated casino–hotels and associated entertainment. A growing retirement and family city, Las Vegas is the 28th-most populous city in the United States, with a population at the 2010 census of 583,756. The 2010 population of the Las Vegas metropolitan area was 1,951,269.

Established in 1905, Las Vegas was incorporated as a city in 1911. At the close of the 20th century, Las Vegas was the most populous American city founded in that century (a distinction held by Chicago in the 19th century). The city's tolerance for various forms of adult entertainment earned it the title of Sin City, and this image has made Las Vegas a popular setting for films and television programs. There are numerous outdoor lighting displays on Fremont Street, as well as elsewhere in the city.

A trailer or preview is an advertisement or a commercial for a feature film that will be exhibited in the future at a cinema. The term "trailer" comes from their having originally been shown at the end of a feature film screening. That practice did not last long, because patrons tended to leave the theater after the films ended, but the name has stuck. Trailers are now shown before the film (or the A movie in a double feature) begins.

Movie trailers have now become popular on DVDs and Blu-ray Discs, as well as on the Internet and Mobile devices. Of some 10-billion videos watched online annually, film trailers rank #3, after news and user-created video.

The first trailer shown in a U.S. film theater was in November 1913, when Nils Granlund, the advertising manager for the Marcus Loew theater chain, produced a short promotional film for the musical The Pleasure Seekers, opening at the Winter Garden Theatre on Broadway. Loew adopted the practice, which was reported in a wire service story carried by the Lincoln, Nebraska Daily Star, describing it as "an entirely new and unique stunt", and that "moving pictures of the rehearsals and other incidents connected with the production will be sent out in advance of the show, to be presented to the Loew’s picture houses and will take the place of much of the bill board advertising". Granlund was also first to introduce trailer material for an upcoming motion picture, using a slide technique to promote an upcoming film featuring Charlie Chaplin at Loew's Seventh Avenue Theatre in Harlem in 1914. Up until the late 1950s, trailers were mostly created by National Screen Service and consisted of various key scenes from the film being advertised, often augmented with large, descriptive text describing the story, and an underscore generally pulled from studio music libraries. Most trailers had some form of narration and those that did featured stentorian voices.

A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects. The process of filmmaking has developed into an art form and industry.

Films are cultural artifacts created by specific cultures, which reflect those cultures, and, in turn, affect them. Film is considered to be an important art form, a source of popular entertainment and a powerful method for educating – or indoctrinating – citizens. The visual elements of cinema give motion pictures a universal power of communication. Some films have become popular worldwide attractions by using dubbing or subtitles that translate the dialogue into the language of the viewer.

Films are made up of a series of individual images called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot see the flickering between frames due to an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. Viewers perceive motion due to a psychological effect called beta movement.

A trailer may refer to:

In transportation:

In music:

In films and video:

In computing: