This document lists 50 different types of slides that can be used in presentations. It groups the slides into several categories like charts, photos, infographics, text, important slides, and figures. Some of the specific slide types listed include bar charts, histograms, pie charts, photos of humans with text, visual metaphors, word clouds, titles slides, section slides, and call to action slides. The document notes that the source of this list of slide types is slideshare.net.