Function

Function - A specific set of skills and resources that can be used to perform one or more activities that make up a postal process. Usually, several functions are associated with a single process.

[Category=Postal ]

Source: USPS, 20 September 2009 12:05:31, http://www.usps.com/cpim/ftp/pubs/pub32/pub32a_g.html

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Function - A group of related actions contributing to a larger action.

[Category=Quality ]

Source: American Society for Quality, 24 September 2010 09:15:48, http://www.asq.org/glossary/

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function - 

   (1) [analysis/geoprocessing] An operation. In GIS, functions include data input, editing, and management; data query, analysis, and visualization; and output operations.
   (2) [analysis/geoprocessing] Processing operation applied to rasters or mosaic datasets. Can be applied in an order defined by a function chain.

[Category=Geospatial ]

Source: esri, 24 April 2012 08:03:10, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation