Computational thermodynamics may be considered a part of materials informatics and is a cornerstone of the concepts behind the materials genome project. While crystallographic databases are used mainly as a reference source, thermodynamic databases represent one of the earliest examples of informatics, as these databases were integrated into thermochemical computations to map phase stability in binary and ternary alloys. Many concepts and software used in computational thermodynamics are credited to the SGTE Group, a consortium devoted to the development of thermodynamic databases; the open elements database is freely available based on the paper by Dinsdale. This so-called "unary" system proves to be a common basis for the development of binary and multiple systems and is used by both commercial and open software in this field.