Not AND. The BooleaN fuNctioN which is true uNless both its argumeNts are true, the logical complemeNt of AND: A NAND B = NOT (A AND B) = (NOT A) OR (NOT B) Its truth table is: A | B | A NAND B --+---+--------- F | F | T F | T | T T | F | T T | T | F NAND, like NOR, 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 NAND A A AND B = NOT (A NAND B) A OR B = (NOT A) NAND (NOT B) (1995-01-24)