An AND-inverter graph is a type of diagram that helps you to understand how different parts of a system interact with each other. It is made up of nodes, which represent parts of the system, and lines (or edges), which represent the connection between parts. The "AND" part of the name comes from the fact that the lines all join into one at the end, creating a kind of "AND" shape. The "inverter" part of the name comes from the fact that the diagram also includes an arrow that points back to the starting node, showing how each part of the system affects the others in a cyclical pattern. When you look at an AND-inverter graph, you can quickly see how all the parts of the system are related and how they affect each other.