norm

n 1: a standard or model or pattern regarded as typical: "the

current middle-class norm of two children per family"

2: a statistic describing the location of a distribution: "it

set the norm for American homes" [syn: {average}]

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)