U of M Media Resources Univ. And if you assemble several pictures, and present them sequentially, you have a slide show. Photographic slides are a convenient, portable, effective image medium.
Projected slides provide sharp, bright images suitable for viewing by large or small audiences.
And, slides can be either visual support alone for talks or lectures, or accompanied by a complete sound track, essentially making a stand-alone presentation possible. A slide, used conventionally, is useless without projection equipment, which is not always portable, or convenient. Slides are a delicate format, easy to scratch and bend. And, slides are not easy to duplicate in quantity. Cameras that record digital images are becoming accessible and affordable.