Accessibility

Last updated on February 15, 2025.

Summary

Website content posted since February 2025 meets Web Content Accessibility Guidelines (WCAG) 2.1 at Level AA. Older content meets earlier versions of WCAG. Parts of the content meet Level AAA.

Measures to support accessibility

When visitors leave comments on the site we collect the data shown in the comments form, and also the visitor’s IP address and browser user agent string to help spam detection.

Media

We take the following measures to ensure accessibility of this website:

  • Include accessibility as a requirement for all web content. Content must meet WCAG 2.1 AA, and should meet AAA as feasible.
  • Assign clear accessibility goals and responsibilities.
  • Ensure content authors have accessibility knowledge and skills.
  • Include accessibility as part of our mission.
  • Include accessibility throughout our internal policies.
  • Usability test with participants with disabilities.

Conformance status

The Web Content Accessibility Guidelines (WCAG) standard defines requirements to improve accessibility for people with disabilities. It defines three levels of conformance: Level A, Level AA, and Level AAA. “Fully conforms” means that the content meets all of the WCAG requirements at the specified Level without exceptions.

Content posted since February 2025 fully conforms to WCAG 2.1 Level AA. It partially conforms to Level AAA.

Older content conforms to earlier versions of WCAG, for example, WCAG 2.0. Most of the older content is archived and will not be updated.

Feedback

We welcome your feedback on the accessibility of this website. Please let us know if you encounter any issues by using our contact form. We usually respond to accessibility feedback from e-mail within 3-5 business days. Sometimes it can take up to 3 weeks.

Compatibility with browsers and assistive technology

This website is designed to be compatible with assistive technologies and the last two versions of major browsers.
In Internet Explorer 10, 11, and older browsers, some aspects of the website may not display optimally. The website is not designed for Internet Explorer 9 and earlier versions.

Technical specifications

The WAI website relies upon the following technologies for conformance with WCAG 2.1:

  • HTML
  • WAI-ARIA
  • CSS
  • SVG

The following technologies are used to improve accessibility and the user experience for everyone:

  • JavaScript

Limitations and alternatives

Several videos on this website use YouTube and Vimeo. As an alternative, the videos are provided as MP4 files on a server.

Assessment approach

This website’s accessibility was assessed by self-evaluation and was approved by its owner.