Performing some predefined sequence of operations on an input to produce an output or chanGE of internal state activity specifically involving the computer' s CPU. The term is often qualified: "data processing" treats digital data, "signal processing" treats analog data (possibly in digital form), "word processing" takes in typed human languaGE input and produces digital documents, {imaGE processing} transforms digital {imaGEs}. (2003-10-23)