The document discusses different types of missiles. It describes missiles as self-propelled precision weapons that can destroy targets like aircraft, satellites, ships, and tanks. The key types discussed are air-to-air missiles launched from aircraft to target other aircraft, air-to-surface missiles that attack land or sea targets, surface-to-air missiles launched from ground to target aircraft, and surface-to-surface missiles that strike land or sea targets over long ranges. The document also covers submarine-launched missiles, ballistic missiles that travel along an initial high trajectory, and cruise missiles that are aerodynamically guided over long distances with accuracy.