At a high level, the entity-relationship diagram in Figure shows how an organic device sample with its associated reported measurement (i.e., a charge-carrier mobility value) may be conceptually encapsulated as an experimental data record. This diagram provides an important visualization of how various parameters, data, and information in the experimental real world are captured as attributes of related objects, to facilitate the organization of data in constructing a database. Rectangles represent entities or objects, diamonds represent relationships between entities, and labeled ovals represent attributes containing the data or information associated with the various entities, where underlined labels denote a unique identifier for that object.