This document lists 50 different types of slides that can be used in presentations. Some of the highlighted slide types include charts (bar charts, histograms, scatter charts), photos (printscreen, photo of human and text, animals), infographics (visual metaphors, word clouds, timelines), text-based slides (quotes, lists, questions), and important structural slides (title slides, section slides, last slides). The document provides a high-level overview of different visual elements that can be incorporated into presentations.