"As library users access more services through the Web, the importance of providing usable and accessible websites and content has come to the forefront of library service concerns. While libraries do have some unique use cases, for the most part simply following established standards and best practices in usability, accessibility, and universal design will allow libraries to offer clear and consistent Web services and interfaces. This chapter touches on the most important aspects of Web usability and accessibility and offers a basic roadmap for both increasing awareness and accomplishing concrete Web usability goals and accessibility compliance. In chapter 4 of Library Technology Reports (vol. 48, no. 7) "Making Libraries Accessible: Adaptive Design and Assistive Technology" we will look at the basics of Web accessibility, learn how to create and upgrade static websites, and discuss accessibility best practices in modern content management systems such as Drupal or WordPress." (Abstract)