Abstract: A graphical data-compressor for compressing received arbitrary graphical data for subsequent transmission; where the graphical data-compressor comprises an input for receiving the received arbitrary graphical data, the input being linked to an analyzer for analysis of the received arbitrary graphical data into constituent geometrical parts, the analyzer being linked to an analytic scene describer, for description of said constituent geometrical parts as an analytic description of the received arbitrary graphical data, the analytic scene describer being linked to a transmitter, the transmitter being for transmission of the analytic description.

Abstract: A virtual environment for user interaction, and virtual objects for use therein, the virtual objects having an internal co-ordinate system with natural language definition to allow simplified inter-object relationships. The internal co-ordinate system is used to define docking positions for connecting to other objects to allow logical or natural positional relationships. A dynamically defined menu system allows pop-up menus for simple user entry of required relationships.

Abstract: A virtual object for use in an object oriented environment; the virtual object comprising at least a user-sensible aspect and further comprising at least a functional aspect; the said user-sensible aspect being encapsulated as a user-sensible encapsulation, separately from the functional aspect, which is encapsulated as a functional encapsulation.