NOR gate

A NOR gate is a basic digital logic gate that outputs a true or "high" signal only when all of its inputs are false or "low." If any input is true, the output will be false. Think of it as a combination lock that opens only when all the inputs are in the off or zero state; if any input is turned on, the lock remains closed. NOR gates are fundamental in digital circuits, often used to build more complex logic operations due to their versatility and ability to perform universal logic functions.