A television program, television programme, or television show is a segment of content intended for broadcast on television, other than a commercial, channel ident, trailer, or any other segment of content not serving as attraction for viewership. It may be a single production, or more commonly, a series of related productions (also called a television series). A television series that is intended to comprise a limited number of episodes may be called a miniseries or serial. Series without a fixed length are usually divided into seasons or series, yearly or semiannual sets of new episodes. While there is no defined length, US industry practice tends to favor longer seasons than those of some other countries.