The NCO toolkit manipulates and analyses data stored in netCDF-accessible
formats, including DAP, HDF4, and HDF5.  It exploits the geophysical
expressivity of many CF (Climate & Forecast) metadata conventions,
the flexible description of physical dimensions translated by
UDUnits, the network transparency of OPeNDAP, the storage features
(e.g., compression, chunking, groups) of HDF (the Hierarchical Data
Format), and many powerful mathematical and statistical algorithms
of GSL (the GNU Scientific Library).  NCO is fast, powerful, and
free.
