Electrical engineering is a broad field encompassing such diverse subject areas as computers, controls, electronics, digital systems, communications, signal processing, electromagnetics, and physics of electronic devices. Electrical engineers focus on the behavior of electronic devices and circuits that are the basic building blocks of complex electronic systems: the generation, transmission, and utilization of electrical energy; behavior of complex electronic systems, such as computers, automatic controls, telecommunications, and signal processing; and the applications of these complex systems to other areas, including medicine, biology, geology, and ecology.