When websites and web tools are properly designed and coded, people with disabilities can use them. However, currently many sites and tools are developed with accessibility barriers that make them difficult or impossible for some people to use [W3C - Introduction to Web Accessibility]. The European accessibility requirements present a new and welcome challenge for OSGeo applications. Accessibility (a11y) goes far beyond ease-of-use, with strict guidance on making web applications easily accessible to screen readers and assistive technologies. This talk provides an overview of implementing the accessibility guidelines WCAG 2.1, WAI-ARIA, and EN 301 549 (Harmonised European Standard). GeoNetwork is used as a case study here, with “hands-on” illustrations of successful guideline implementations and their technical and organisational challenges. Making OSGeo Software accessible is a rewarding task that requires broad community engagement and support. Attend this talk to learn more about meeting the a11y requirements and the impact they will have on your organisation and your software solution.