Abstract: A user input is communicated to an application resident on a data processing system according to a code set which is adaptively selected in response to the application, the selected code set mapping to a respective set of corresponding user inputs, the selected code set optimizing a performance parameter for communicating between a user input device and the application. The selected code set may be selected from a stored plurality of code sets. Preferably, the selected code set minimizes energy expended in communicating codes from the user input device to the data processing system. According to one aspect, the application may first be identified, and then the selected code set may be selected according to the identified application. According to another aspect, a plurality of user inputs to the application may be accepted at the user input device and recorded, and the selected code set may be selected based on the recorded plurality of user inputs.