Carousel slide projectors
Introduced by Kodak in 1961, the carousel slide projector was a popular way to view photographic slides in large-scale full color. A circular tray was filled with upside down and backward 35mm slides and mounted on a base that would then invert and project the images onto a screen. The creation of the projector resulted in the “slideshow” — a popular fixture for professionals as well as home parties. Projectors were extremely common in the 1960s and 1970s, but, given the rise of digital media, slowly declined in popularity until Kodak discontinued the product in 2004.