A slide show is a presentation of a series of still images on a projection screen or electronic display device, typically in a prearranged sequence. Each image is usually displayed for at least a few seconds, and sometimes for several minutes, before it is replaced by the next image. The changes may be automatic and at regular intervals or they may be manually controlled by a presenter or the viewer. Slide shows originally consisted of a series of individual photographic slides projected onto a screen with a slide projector. When referring to the video or computer-based visual equivalent, in which the slides are not individual physical objects, the term is often written as one word, slideshow.
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