Organizations can choose following accessibility standards or guidelines

• Web Content Accessibility Guidelines (WCAG) version 1 or 2; A or AA
• Government of India Guidelines for Web Accessibility (GIGW) version 1 or 1.1
• Section 508 of US Rehabilitation Act
• Americans with Disabilities Act (ADA) compliance
• Mobile Web Best Practices (MWBP) of W3C
• Android Accessibility Developers Guide
• iOS Human Interaction Accessibility Guide
• Microsoft Accessibility Standards: MSAA or MS UI Automation for Microsoft Windows Desktop Applications
• Flash accessibility design guidelines
• PDF Accessibility Standards for PDF Documents