BASIC LOGIC GATE

Type	Distinctive shape		Boolean algebra between A & B	Truth table
AND				INPUT OUTPUT A B A AND B 0 0 0 0 1 0 1 0 0 1 1 1
OR			A + B	INPUT OUTPUT A B A OR B 0 0 0 0 1 1 1 0 1 1 1 1
NOT				INPUT OUTPUT A NOT A 0 1 1 0
In electronics a NOT gate is more commonly called an inverter. The circle on the symbol is called a bubble, and is generally used in circuit diagrams to indicate an inverted (active-low) input or output.[1]
NAND				INPUT OUTPUT A B A NAND B 0 0 1 0 1 1 1 0 1 1 1 0
NOR				INPUT OUTPUT A B A NOR B 0 0 1 0 1 0 1 0 0 1 1 0
XOR				INPUT OUTPUT A B A XOR B 0 0 0 0 1 1 1 0 1 1 1 0
XNOR				INPUT OUTPUT A B A XNOR B 0 0 1 0 1 0 1 0 0 1 1 1