Below is a growing list of definitions and terms relating to accessibility
WCAG: Web Content Accessibility Guidelines
AODA: Accessibility for Ontarians Act
A, AA, or AAA: A standard for measuring the spectrum of accessibility on a web page or document created by WCAG. Typically the goal is to have at least a AA standard for a professional web site.
AODA: The Accessibility for Ontarians with Disabilities Act addresses Customer Service, Information, Employment, Transportation and Design of Public spaces.
Disability: Physical or mental condition that limits a person's movements, sentences, or activities. The AODA uses the same definition of disability as the Ontario Human Rights Code.
A11y: A community based attempt to make web accessibility better.
Assistive Technology: Technologies (software or hardware) that increase, maintain or improve the functional capabilities of individuals with disabilities.
Screen Reader: A piece of software or program used to turn text on screen into a altered output such as audio or Braille.
Usability: A way to measure the quality of a user's experience when using software, a web page, or other technologies as intended or with assistive technology.
Section 508 (or just "508"): An act created to eliminate barriers of information technology and make available new opportunities for people with disabilities.
Low Vision: Someone whose vision is 20/200 or lower and cannot be corrected by surgery, glasses or medicine.
Tagging: Tagging is the process of putting data or content into proper containers so that assistive technology can read the document/content in the correct order. This is can be done using semantic HTML for a web page, or using the Accessibility Checker in Adobe Acrobat or Microsoft Office.