It carries more of an assumption that the film is shown as part of a presentation along with a feature film. Short films are often screened at local, national, or international film festivals and made by independent filmmakers with a low budget or no budget at all. Short films are generally used by filmmakers to gain experience and/or prove their talent in order to gain funding for future films from private investors, entertainment companies, or film studios. Animated cartoons came principally as short subjects. Virtually all major film production companies had units assigned to develop and produce shorts, and many companies, especially in the silent and very early sound era, produced mostly or only short subjects.