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The Collaborative International Dictionary of English v.0.48:

Nor \Nor\ (n[^o]r), conj. [OE. nor, contr. from nother. See Neither.] A negative connective or particle, introducing the second member or clause of a negative proposition, following neither, or not, in the first member or clause (as or in affirmative propositions follows either). Nor is also used sometimes in the first member for neither, and sometimes the neither is omitted and implied by the use of nor. [1913 Webster] Provide neither gold nor silver, nor brass, in your purses, nor scrip for your journey. --Matt. x. 9, 10. [1913 Webster] Where neither moth nor rust doth corrupt. --Matt. vi. 20. [1913 Webster] I love him not, nor fear him. --Shak. [1913 Webster] Where neither party is nor true, nor kind. --Shak. [1913 Webster] Simois nor Xanthus shall be wanting there. --Dryden. [1913 Webster]
The Free On-line Dictionary of Computing (18 March 2015):

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)