provides access to NEMS to outside users through its model archival program. An archive includes the model source code and input data used to derive a given projection case, such as the "reference case." The stated archive purpose "is to demonstrate that the published results from the AEO reference case can be replicated with the model and to disclose the source code and inputs used." The model is not widely used outside of EIA, as deploying the model requires additional commercial software, such as compilers and optimization modeling packages, in addition to the model source code and data. References Energy in the United States Energy models