4072 Dual 4-input OR gates. +----------+ +-------------------+ 1Y |1 +--+ 14| VCC | A | B | C | D |/Y | Y = A+B+C+D 1A |2 13| 2Y |---+---+---+---+---| 1B |3 12| 2D | 0 | 0 | 0 | 0 | 0 | 1C |4 4072 11| 2C | 0 | 0 | 0 | 1 | 1 | 1D |5 10| 2B | 0 | 0 | 1 | X | 1 | |6 9| 2A | 0 | 1 | X | X | 1 | GND |7 8| | 1 | X | X | X | 1 | +----------+ +-------------------+ [This information is part of the GIICM]