project advertising slides and messages such as "Ladies, kindly remove your hats". After 35 mm Kodachrome color film was introduced in 1936, a new standard 2×2 inch (5×5 cm) miniature lantern slide format was created to better suit the very small transparencies the film produced. In advertising, the antique "magic lantern" terminology was streamlined, so that the framed pieces of film were simply "slides" and the lantern used to project them was a "slide projector". Home slide shows were a relatively common phenomenon in middle-class American homes during the 1950s and 1960s. An image on 35 mm film mounted in a 2×2 inch (5×5 cm) metal, card or plastic frame is still by far the most common photographic slide format. Uses A well-organized slide show allows a presenter to fit visual images to an oral presentation. The old adage "A picture is worth a thousand words" holds true, in that a single image can save a presenter from speaking a paragraph of descriptive details. As with any public speaking or lecturing, a certain amount of talent, experience, and rehearsal is required to make a successful slide show presentation. Presentation software is most commonly used in the business world, where millions of presentations are created daily. Another very important area where it is used is for instructional purposes, usually with the intention of creating a dynamic, audiovisual presentation. The relevant points to the entire presentation are put on slides, and accompany a spoken monologue. Slide shows have artistic uses as well, such as being used as a screensaver, or to provide dynamic imagery for a museum presentation, for example, or in installation art. David Byrne, among others, has created PowerPoint art. In art Since the late 1960s, visual artists have used slide shows in museums and galleries as a device, either for presenting specific information about an action or research or as a phenomenological form in itself. According to the introduction of Slide Show, an exhibition organized at the Baltimore Museum of Art: “Through the simple technology of the slide projector and 35 mm color transparency, artists discovered a tool that enabled the transformation of space through the magnification of projected pictures, texts, and images.” Although some artists have not necessarily used 35 mm or color slides, and some, such as Robert Barry, have even abandoned images for texts, 35 mm color film slides are most commonly used. The images are