Unmanned Aerial Vehicles (UAVs), commonly referred to as drones, have evolved from niche military tools to versatile instruments with a wide range of applications. This chapter provides an introduction to UAV technology by exploring its historical development, key components, and the diverse spectrum of industries and sectors in which UAVs are utilized today. From early military experiments in the twentieth century to modern-day innovations driven by miniaturization and control systems, UAVs have undergone continuous transformation. They revolutionize areas such as surveillance, agriculture, and logistics.