Source : WordNet®

data processing
     n : (computer science) a series of operations on data by a
         computer in order to retrieve or transform or classify
         information

Source : Free On-Line Dictionary of Computing

data processing
     
         The input, verification, organisation, storage,
        retrieval, transformation, and extraction of {information}
        from {data}.  The term is normally associated with commercial
        applications such as stock control or payroll.
     
        (1995-03-30)