Keywords: RTL 3-Input NOR Gate.svg NOR gate built using Resistor-transistor logic Gates just like this but on integrated circuits were used in the Apollo Guidance Computer and can be seen on the original schematics Dwg No 2005011 can be found http //klabs org/history/ech/agc_schematics/logic/5011-1 jpg here own Inductiveload 2009-01-18 Resistor-transistor logic NOR gates Resistor circuits |