Table 2 shows the resources which can be employed to do participant messaging at varying degrees of sophistication. Any of the fifteen variants can add significant new opportunities for participant interaction. The document environment is central. The reason why the production of a multiple copy Bulletin is given the highest priority is that it opens up the most new options for interaction and offers a number of other benefits. The vast majority of conference-goers relate most readily to the printed word.
People feel comfortable with hardcopy which they can study and mark up at leisure.
The collection of messages can be mulled over by participants if a speaker fails to hold their attention. The wall display and computer networks can be completely distinct from the document stream or adjuncts to it. These are entered by routes which diverge from the main decision-processing path which produces multiple copy Bulletins . Each module is more or less self-contained and contains cross references to other modules to which is closely related. D. Design and Preparation .