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Electrical engineering is an engineering discipline concerned with the study, design and application of equipment, devices and systems which use electricityelectronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after commercialization of the electric telegraph, the telephone, and electrical power generation, distribution and use.

Electrical engineering is now divided into a wide range of fields, including computer engineeringsystems engineeringpower engineeringtelecommunicationsradio-frequency engineeringsignal processinginstrumentation, and electronics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, electromagnetics and waves, microwave engineeringnanotechnologyelectrochemistry, renewable energies, mechatronics, and electrical materials science.