NOR gate

INPUT		OUTPUT
A	B	A NOR B
0	0	1
0	1	0
1	0	0
1	1	0

The NOR gate is a logic gate that outputs 1 (true) when both of its inputs are 0 (false). That means that if at least one of its inputs is 1 (true), the output will be 0.

The best way to remember a NOR operation is "neither one or the other, nor both."

Symbols

There are three symbols for the NOR gate:

MIL/ANSI Symbol	IEC Symbol	DIN Symbol