Abstract: Apparatus for providing input signals to a device such as a computer (1) to be controlled by a n operator comprises means (3) for generating a virtual image (2) of an interface tot he device to be controlled, means (5) for detecting the position of an operating member (4) actuated by the operator, and means (6, 7, 3) for generating a virtual image (8) of the operating member (4), the arrangement being such that movement of the operating member image (8) in accordance with movement of the operating member (4) interacts with the interface image (2) to provide the input signals for the device. A method of providing the input signals is also disclosed. The detecting means (5) preferably comprises a stereoscopic image generator, while the means for generating the virtual images includes a virtual environment processor (3). The advantage of the apparatus and method lies in its ease of use, as the operating member can be held in a comfortable position.