Abstract: A display apparatus for displaying a moving object traversing a virtual display region comprises two or more client computer devices each being configured to display a respective portion of the virtual display region, in which each respective portion is defined by a set of edges, each edge being classified as a hard edge, from which the moving object is reflected, or a soft edge through which the moving object is allowed to pass; and a path controller, associated with each client computer device, for defining a path of the moving object with respect to the portion of the virtual display region which is displayed by that client computer device; the path controller being configured, when the path controller defines a path which intersects a soft edge of that client computer device's portion of the virtual display region, to transmit data defining the path of the moving object for use at least by another client computer device which displays the next portion of the virtual display region which will lie within th

Abstract: A querying system in a computer apparatus may be customized by connection of a removable storage medium device to a storage medium interface of the computer apparatus. The computer apparatus detects whether, in the storage medium thereof, there is stored customisation data that indicates a change to the query engine data identifying locations where query messages are sent. If so, the query engine data in the computer apparatus is changed accordingly.

Abstract: A display apparatus for displaying a moving object traversing a virtual display region comprises two or more client computer devices each being configured to display a respective portion of the virtual display region, in which each respective portion is defined by a set of edges, each edge being classified as a hard edge, from which the moving object is reflected, or a soft edge through which the moving object is allowed to pass; and a path controller, associated with each client computer device, for defining a path of the moving object with respect to the portion of the virtual display region which is displayed by that client computer device; the path controller being configured, when the path controller defines a path which intersects a soft edge of that client computer device's portion of the virtual display region, to transmit data defining the path of the moving object for use at least by another client computer device which displays the next portion of the virtual display region which will lie within th

Abstract: A querying system in a computer apparatus may be customized by connection of a removable storage medium device to a storage medium interface of the computer apparatus. It is detected whether, in the storage medium thereof, there is stored customisation data that that indicates a change to the query engine data identifying locations where query messages are sent. If so, the query engine data in the computer apparatus is changed accordingly.

Abstract: A notification system in a computer apparatus may be customized by connection of a removable storage medium device to a storage medium interface of the computer apparatus. It is detected whether, in the storage medium thereof, there is stored customisation data that includes notification data of additional notifications. If so, the notification data in the computer apparatus is changed to include the notification data of additional notifications.

Abstract: A user interface in a computer apparatus may be customized by connection of a removable storage medium device to a storage medium interface of the computer apparatus. It is detected whether, in the storage medium thereof, there is stored customisation data that includes icon data and target data in respect of additional icons for the user interface. If so, user interface data in the computer apparatus is changed to include the icon data and target data in respect of the additional icons.

Abstract: A user interface in a computer apparatus may be customized by connection of a removable storage medium device to a storage medium interface of the computer apparatus. It is detected whether, in the storage medium thereof, there is stored customisation data that identifies a change to the appearance of the user interface, for example in the colours, textures, container-shape or font. If so, user interface data in the computer apparatus is changed to include the icon data and target data in respect of the additional icons.