Suggests structure based on two sets of principles for deriving meaning from data: Shannon's measure of entropy, which provides means of measuring amount of information in message; and Ranganathan's faceted classification scheme, which provides means of determining number of meaningful data. Syntax, meaning, and semantics of data are discussed.…

Describes an information processing model which can be used to make operating instructions and reference manuals easy for customers to understand and remember. Long-term and short-term memory, readability of text, the use of graphics, and providing cues to improve retention are discussed in terms of the model. (EJS)