There are many examples: Biochemical pathways: https://www.roche.com/sustainability/philanthropy/science_education/pathways.htm https://www.roche.com/sustainab

There are many examples: Biochemical pathways: https://www.roche.com/sustainability/philanthropy/science_education/pathways.htm https://www.roche.com/sustainability/philanthropy/science_ed... Financial market trades Suppliers for the parts of a car Electrical networks Data networks Neural networks Metabolic networks https://en.wikipedia.org/wiki/Metabolic_network https://en.wikipedia.org/wiki/Metabolic_network Electronic components Fields of mathematics History of mathematics / politics etc