Structure's a fundamental and sometimes intangible notion covering the recognition, observation, nature, and stability of patterns and relationships of entities. From a child's verbal description of a snowflake, to the detailed scientific analysis of the properties of magnetic fields, the concept of structure's an essential foundation of nearly every mode of inquiry and discovery in science, philosophy, and art. A structure defines what a system's made of. It's a configuration of items. It's a… (More on Structure)