Black-and-white is a broad adjectival term used to describe a number of forms of visual technology. Most forms of visual technology start out in black and white, then slowly evolve into color as technology progresses.
"Black-and-white" as a description is also something of a misnomer, for in addition to black and white most of these media included varying shades of grey. Further, the original stock of many early photographic and film formats were in sepia, which gave a richer, more subtle shading than reproductions in plain black-and-white, although less so than color.
Today black-and-white media often has a "nostalgic," historic, or anachronistic feel to it. For example, the 1998 Woody Allen film Celebrity was shot entirely in black-and-white. Other films, such as Pleasantville and The Wizard of Oz play with the concept of the black-and-white anachronism, using it to selectively portray scenes and characters who are either more outdated or dull than the characters and scenes shot in full-color. This manipulation of color appears in the film Sin City and the occasional television commercial.