types of communication by purpose, audience, and context. In this document, environment refers to the following modes of communication (1) expressive, (2) informational, (3) argumentative, (4) critical, (5) literary, and (6) grammar/language usage.

Places within a Web site where the associations between pages lead to the belief that the pages have a common theme to explore or use for a specific purpose. A Web chat environment, for example, is a set of pages that supports the chat model.

A criterion for classifying problems describing where the problem takes place (see Behaviors) 15, 28, 30

a general inability to send binary messages which are required for some advanced message formats