Source : Free On-Line Dictionary of Computing

xor
     
        /X'or/, /kzor/ Exclusive or.  "A xor B" means "A or B, but not
        both".  The {truth table} is
     
        	A | B | A xor B
        	--+---+--------
        	F | F |    F
        	F | T |    T
        	T | F |    T
        	T | T |    F
     
        [{Jargon File}]
     
        (1994-12-01)