NCAR Research Data Archive archives data for atmospheric and geosciences research. The archive is maintained by the Data Support Section of the Computational and Information Systems Laboratory] (CISL) at the National Center for Atmospheric Research (NCAR) in Boulder, Colorado. The archive acquires, curates, preserves and disseminates an extensive list of over 700 data sets. Registration is free and open to the general public. Nearly all of the datasets are free to all registered users; a few are restricted to certain users (e.g. university researchers).