Accessibility is the practice of enabling individuals with cognitive or physical impairments to seamlessly interact with products, applications, or services. Some of these impairments include vision or hearing loss, mobility constraints, and memory changes. An accessibility evaluation is based on common accessibility guidelines, including Section 508 and WCAG 2.0. An accessibility evaluation may or may not involve end-users. The outcome of an accessibility evaluation is the identification of accessibility issues, and the best remedy to improve the accessibility of any product.