Power apparatus and systems refer to equipment and networks used in electricity generation, distribution, and transmission. There are various synonyms for this term, including electrical machinery and gear, energy infrastructure, electric utilities, and power equipment. Other synonyms include electrical systems, energy systems, power stations, and grid systems. Some more technical terms include electro-mechanical devices, electric circuits, and power networks. These synonyms can be used interchangeably to refer to the same set of tools and structures. Regardless of the synonym used, all these terms refer to the essential elements that enable the generation, distribution, and control of electrical power in modern civilization.