1. netCDF Operators NCO is a suite of programs known as operators. Each operator is a standalone, command line program that is executed at the UNIX shell-level. The operators take one or more netCDF files as input, perform an operation (e.g., averaging or hyperslabbing), and produce a netCDF file as output. The operators are primarily designed to aid manipulation and analysis of data. This reflects their origin, but the operators are as general as netCDF itself. From Debian 3.0r0 APT