18F Accessibility Guide

18F Accessibility guide help developers identify potential accessibility issues in their websites or applications. The checklist is divided into three sections: A, B, and C, indicating the level of criticality of the issues. Section A consists of critical issues that can cause significant problems for users of assistive technology, while Sections B and C cover issues that may cause problems or frustration for certain users. The checklist emphasizes keyboard accessibility, form inputs with explicit labels, proper use of images and alt attributes, multimedia tagging, color contrast in text, logical tab order, proper table coding, and more.