The Chemical Informatics Group (CIG) develops and applies theory and simulation at various length and time scales to calculate a wide variety of chemical and physical properties of molecular and complex systems relevant to industry, government agencies and research institutions. The CIG establishes the accuracy of computational methods by compiling comparisons to measured values. The group develops new algorithms for chemical informatics, data analysis, and molecular simulation, as well as new standards for the management, validation, and dissemination of computational and experimental data. The group's efforts are performed in support of measurement science in areas such as chemical manufacturing, environment and climate, energy, biomedical and health, and advanced materials.