Keywords: 1. Theorem.svg en Logic Circuit with AND and NOR gates pt Circuíto lógico com portas AND e NOR 1 Teorema png 12/05/2012 vectorization 2013-07-26 original Rafael Fonseca de Souza ; vectorization U TaraTaylorDesign and User Perhelion other versions <gallery widths 200 heights 60 showfilename> 2 Theorem svg </gallery> h + d cc-zero De Morgan's law NOR gate symbols AND gate symbols |