Graphs

• Graphs are one of the most useful data structures around.
• They are also a useful mathematical system. Frank Harrary developed graph theory in the 70s.
• I'm not talking about pictures here (graphs have another meaning).
• Instead, I'm talking about a general way of representing discrete data.
• There are lots of types of graphs.
• FSAs were one type of graph.
• Graphs are based around Nodes and Edges.