Copyright, a form of intellectual property low, usually protects original works of authorship, including computer software and hardware. Certain copyright licenses (e.g. CC, BSD, GNU) enable free distribution of software. Learn more about types of licenses and conditions for free distribution of otherwise copyrighted work and software.
The Accessible Rich Internet Applications (WAI-ARIA) specification defines roles, states, and properties that should be used to provide semantics in languages where they may not be available. Assistive technologies, such as screen readers, use what ARIA offers in order to communicate with browsers to present information about the status of interactions, and the like. As a result, WAI-ARIA is especially important to consider when creating dynamic content.