Electrical engineering is a professional engineering discipline that deals with the study and application of electricity, electronics, and electromagnetism. This field first became an identifiable occupation in the later half of the 19th century after commercialization of the electric telegraph, the telephone, and electric power distribution and use. Subsequently, the invention of the thermionic valve in the early 1900s gave rise to the discipline of electronic engineering and with the invention of the transistor and the integrated circuit, that became an important sub-discipline
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