Capacitors were invented in 1745 and have served as portable electrical charge storage devices ever since. During the 19th century a general understanding of electro-magnetism was gradually developed. Electronic devices and circuits were pioneered in the early 20th century and, by its end, revolutionized the generation, processing, storage and transmission of information. No evolutionary limits have yet been approached.
Strictly speaking, all circuits have capacitors; often not wanted, considered parasitic capacitors, such as capacitance of signal interconnections. A great deal of effort...