Guidelines for Writing Accessible Online Help
http://www.stcsig.org/usability/newsletter/0304-help.html

Reed, Will, Everyl Yankee and Wendi Fornoff
Usability Interface
2003

Abstract:

This article describes how to write effective on-line help for blind and low vision users of text based readers. The authors draw on their collective experience in both using text (screen) readers like JAWS to access web applications as well as preparing accessibility help for web pages and applications. This article doesn't include specific information about building web interfaces or sites, use of controls for accessibility within web sites, Section 508 or WAI Standards and Guidelines, or specific information about hardware or software. We include JAWS instructions as an example because it is commonly used in the United States. Also, we don't include information about actual language used within an interface and how to write it to make the interface more accessible. We are only discussing how to write Help pertaining to the interface itself.