Logic XOR Gate
A XOR gate is also referred to as EXCLUSIVE OR. With a XOR gate the output is forced to logic HIGH (1) when one input is exclusively forced to logic HIGH (1). If both inputs are forced to either logic LOW (0) or logic HIGH (1) the output is forced to logic LOW (0). This is similar to the OR gate with the exception of both input being logic HIGH (1). The symbol and truth table for an XOR gate can be seen here.