Abstract: An application can be launched and operated in conjunction with a user-interface accessory (UIA). A launching engine can, using a wireless interrogator, detect an identifier of the UIA. The launching engine can determine and execute a software application corresponding to the UIA identifier. An interaction engine can, using the wireless interrogator, detect an identifier of an object. The interaction engine can detect a force exerted against a sensing surface of a force sensor by the object. The interaction engine can provide to the software application information of the second identifier and the detected force. Some examples include presenting a user interface based on the identifier of the UIA, determining a representation of the object using the identifier of the object, and presenting the representation arranged based on spatial data of the object. Some examples include presenting a user interface specific to the identifier of the UIA.