This document provides an introduction to multirotors and drones, including definitions, types, components, uses, and regulations. It defines multirotors as aerial robots with multiple rotors that are used for both recreational and professional purposes. Examples of components include frames, flight controllers, electronic speed controllers, motors, propellers, and remote controllers. Multirotors are used for filmmaking, agriculture, delivery and more. The document outlines regulations in Vietnam that require permits from the Defense Ministry for operation and discusses how law enforcement addresses unauthorized drone use.