This document discusses drones (also called UAVs or unmanned aerial vehicles). It defines drones as aircraft that are controlled remotely or autonomously without a human pilot on board. The document outlines the history of drones, from early attempts at unmanned aircraft to their widespread use today. It describes common drone features and provides examples of specific drone models. The document also discusses various commercial and military applications of drones, such as surveillance, agriculture, delivery, and warfare. Finally, it notes that expansion of the drone market is currently limited by a lack of adequate regulations in most countries.