OR gate

INPUT		OUTPUT
A	B	A OR B
0	0	0
0	1	1
1	0	1
1	1	1

The OR gate is a logic gate that outputs 1 (true) when at least one of its inputs is 1 (true). That means that if both of its inputs are 0, the output will be 0.

The best way to remember an OR operation is "one or the other, or both."

Symbols

There are three symbols for the OR gate:

MIL/ANSI Symbol	IEC Symbol	DIN Symbol