Building Management System is a system that controls multiple facilities and operational systems within a single building or site. BMS is used to enhance energy efficiency, safety, user comfort, and control systems such as lighting, HVAC (Heating, Ventilation, and Air Conditioning), security, surveillance, access control, and other facilities. BMS devices can collect data from various devices such as temperature and humidity sensors, motion sensors, and lighting controls, analyzing them to provide recommendations for improvements in energy efficiency and control of HVAC, lighting, security, and other systems. BMS systems are typically operated through a central computer network and require specialized programming and efficient installation to maintain the systems in good condition and operate them effectively.