Being one of the largest branches of engineering, these specialities design and develop electrical and electronic equipment and products.

• They work with power generation and transmission; machinery controls; lighting and wiring for buildings, automobiles, and aircraft; computers; radar; communications equipment; missile guidance systems; and consumer goods; such as, television sets and appliances.
• They may specialize in communications, computers, or power distribution equipment, or in a subdivision; such as, aviation electronic systems or in the research, development, and design of new products.

An integrated system of electricity distribution, usually covering a large area.

Either as analogue or digital meters, they are used to measure electrical units, including voltage, resistance, and current.

The units on a multimeter include direct current volts (DCV), alternating current volts (ACV), ohms (?), and direct current milliamps (DCmA).

Contains guidelines for all types of electrical installations.

The 1984 and later editions of the NEC contain Article 690, "Solar Photovoltaic Systems" which should be followed when installing a PV system.

This organization sets standards for some non-electronic products like junction boxes.