A binary OR is performed pair-wise, or bit-wise, meaning you line the two numbers up and apply OR to each pair of bits using the following truth table. For simplicity though, the result of an OR will be 1 if either or both of its inputs are 1. 
	X	Y	OR
	0	0	0
	0	1	1
	1	0	1
	1	1	1


NOTE: to replay, right click and select Play