Directed at government publishers, PLAIN describes how "plain language" facilitates communication and improves Web site usability. "When we write in plain language, we present information in a way that makes it as easy as possible for people to understand ...
Usability.gov is the primary U.S. government source for information on usability and user-centered design. Contents include usability basics, a step-by-step guide to building usable Web sites, research-based guidelines, templates, and methodologies.
Webcontent.gov is a practical guide to the management federal agency Web sites. Topics include Usability Principles and Techniques, Best Practices, and Content Management. The site also provides tips on how to conduct Web site evaluation.