Before revision: To see how NOR gate logic was used in the Apollo Guidance Computer's ALU, visit URL select any of the 4-BIT MODULE entries in the Index to Drawings, and expand images as desired.
After revision: </ref>To see how NOR gate logic was used in the Apollo Guidance Computer's ALU, visit URL select any of the 4-BIT MODULE entries in the Index to Drawings, and expand images as desired.