This is an excerpt from a lecture presented by Sprinklermatic University on the basics of automatic sprinkler systems. The presentation begins with an overview of the historical development and success rate of sprinkler systems, before diving into the different components, including sprinklers, valves, piping, and fire department connections. The speaker goes into detail about the various types of sprinklers and their operating mechanisms, including temperature ratings, thermal sensitivity, K factors, and spray patterns. The lecture concludes with a discussion of common types of sprinkler systems, such as wet pipe systems, dry pipe systems, and pre-action systems.