1. A method of performing a processing action, the method comprising: detecting an input from a user via an input device of a processing device, the input including a touch by at least one finger of a plurality of fingers of a user or one or more of a plurality of users; estimating a gesture performed by the at least one finger based on the touch; measuring at least part of a fingerprint of the at least one finger, and identifying the at least one finger used to apply the input based on stored fingerprint data that differentiates between individual fingers of the user or the one or more users; identifying an action to be performed based on the estimated gesture and based on the identified at least one finger; and performing the action by the processing device.