Abstract: One aspect provides a computer system for processing data on returned products, by receiving returns data on purchased products returned for a refund; and determining predicted return data for a product sold in the future based on the returns data for the product purchased in the past. Another aspect provides a computer system for receiving customer selection data for a product that the customer proposes to one of purchase and refund, the customer selection data including data identifying the customer and the product; accessing returns data using at least one of the data identifying the customer and the data identifying the product, the returns data indicating at least one of a customer's propensity to return products and a propensity of the product to be returned; and generating a customer interface dependent upon on the returns data for one of the proposed purchase and the proposed refund.

Abstract: The present invention provides a data processing circuit with a power saving mode of operation. The data processing circuit comprises a clock generator for generating a clock signal, and a plurality of clocked circuit elements. In accordance with the present invention, a main bus is arranged to provide the clock signal to the plurality of clocked circuit elements in a first mode of operation, and a power saving bus separate from the main bus is arranged to provide the clock signal to a subset of said plurality of clocked circuit elements in a power saving mode of operation. Further, a clock switcher circuit is provided for switching the clock signal to either the main bus or the power saving bus dependent on the mode of operation.