The following logic gates are available in computer circuits:

The NOT gate

The NOT gate inverts the signal passed through it.

The AND gate

The AND gate, which takes two signals and yields a 1 only if both signals are 1.

The OR gate

The OR gate, which takes two signals and yields a 1 if any of the signals are 1.

The XOR gate

The XOR gate, which takes two signals and yields a 1 if one signal is 1.

The NAND gate

The NAND gate, which takes two signals and yields a 1 if both signals aren’t 1.

The NOR gate

The NOR gate, which takes two signals and yields a 1 if none of the signals are 1.