| 摘要 |
Apparatus comprise a printed article (2) supporting at least one user input device (6), at least one output device (8) and a controller (7). The controller is configured, in response to receiving an input signal from a user input device, to cause an output device to produce an output signal in dependence upon a previous input signal received by the input device or another input device and/or upon an updatable parameter indicating one of at least two states. |
