NOR

You are here: irt.org | FOLDOC | NOR

Not OR.

The Boolean function which is true if none of its inputs are true and false otherwise, the logical complement of inclusive OR. The binary (two-input) NOR function can be defined (written as an infix operator):

A NOR B = NOT (A OR B) = (NOT A) AND (NOT B)

Its truth table is:

	A | B | A NOR B
	--+---+---------
	F | F |    T
	F | T |	   F
	T | F |    F
	T | T |    F

NOR, like NAND, forms a complete set of Boolean functions on its own since it can be used to make NOT, AND, OR and any other Boolean function:

NOT A = A NOR A

A OR B = NOT (A NOR B)

A AND B = (NOT A) NOR (NOT B)

(1995-02-06)

Nearby terms: non-volatile storage « noob « no-op « NOR » NORC COMPILER » NorCroft » NORD PL

FOLDOC, Topics, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, ?, ALL