Now Serving Interactive Information Units 
Interactive information units (IIUs) are online, interactive HTML documents that modify their content based on user input. You can use IIUs to document tasks that are not performed frequently enough to merit a wizard and are too complex for traditional documentation. Content is essential in IIUs and appearance varies. You can provide interactive function with a variety of languages. HTML makes production faster and cost efficient. The Internet makes updating transparent. IIUs are just another example of a great idea brought about by new technology.
Cromarty, Valerie Christensen. STC Proceedings (1998). Articles>Web Design>Interaction Design