There are nodes and links in this fuchai technical diagram. These vertices can be found in bullet, small, and large sizes. The forms and colors they take, as well as whether or not they employ iconography, are all up for grabs. Node significance in a diagram is context and diagramtype dependent. IBM uses technical diagrams for a variety of purposes. They can be used to explain the interdependencies between a system's components and the hierarchy of a given structure or to introduce the concept of sequential order to represent a process flow.