This document lists 50 different types of slides that can be used in presentations. Some of the listed slide types include bar charts, histograms, pie charts, doughnut charts, scatter charts, tables, maps, photos, word clouds, timelines, arrows, quotes, and logos. The slides are grouped into categories of charts, photos, infographics, text, important slides, and figures. The document source is listed as slideshare.net, which is a website where presentation slides can be found and shared.