One or more push buttons on the mouse allow the user to indicate to the computer program that some action is to be taken. 3.65 MPEG Moving Picture Experts Group. 3.66 multimedia An integrated presentation, typically on a computer, of content of various types, such as computer graphics, audio, and video. 3.67 network Chain of interconnected computers. 3.68 now The present time as perceived by the user .
Nodes are abstractions of various real-world objects and concepts.
Examples include spheres, lights, and material descriptions. Nodes contain fields and events . Messages may be sent between nodes along routes . 3.70 node type A required parameter for each node that describes, in general, its particular semantics. For example, Box, Group, Sound, and SpotLight are node types.