SIng, SIgnal procesSIng> 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)