Electronics - Digital, Circuits, Components | Britannica
https://www.britannica.com/technology/electronics/Digital-electronics
WebElectronics - Digital, Circuits, Components: Computers understand only two numbers, 0 and 1, and do all their arithmetic operations in this binary mode. Many electrical and electronic devices have two states: they are either off or on. A light switch is a familiar example, as are vacuum tubes and transistors.
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