Keyboard

A method of associating calibration information with a keyboard comprising a touch sensor, comprises determining calibration information for a further keyboard comprising a similar touch sensor, and associating the calibration information with the keyboard. The method may comprise determining calibration information for a plurality of further keyboards comprising similar touch sensors, combining this calibration information, and associating the combined calibration information with the keyboard. The keyboard and the further keyboard may comprise the same types of components, for example the same types of protective plate, with each plate being associated with a corresponding touch sensor, and/or the keyboard and the further keyboard may be from the same product series. The method may comprise determining a variation between the keyboard and the further keyboard, determining modified calibration information based on the calibration information and the variation, and associating the modified calibration information with the keyboard, for example with a difference in componentry between the keyboard and the further keyboard.