Electrical engineering is a field of engineering that generally deals with the study and application of electricity , electronics and electromagnetism . The field first became an identifiable occupation in the late nineteenth century after commercialization of the electric telegraph and electrical power supply. It now covers a range of subtopics including power , electronics , control systems , signal processing and telecommunications .

Sub-disciplines

• Power
• Control
• Electronics
• Signal processing
• Telecommunications
• Instrumentation
• Computers