Different segments of longer concert tours are known as "legs". The different legs of a tour are denoted in different ways, dependent on the artist and type of tour, but the most common means of separating legs are dates (especially if there is a long break at some point), countries and/or continents, or different opening acts. In the largest concert tours, it is becoming more common for different legs to employ separate touring production crews and equipment, local to each geographical region. Concert tours are often managed on the local level by concert promoters or by performing arts presenters.