The latest WCAG guidelines can be found at https://www.w3.org/WAI/standards-guidelines/wcag/.
Increase usability for all users, including those with low vision, blindness, hearing impairments, cognitive impairments, motor impairments, or situational disabilities (such as a broken arm).
List of assistive technology
Keyboard. Hardware or software allowing users to jump from selection to selection in a linear fashion.