Semantic Markup refers to marking up documents in ways that provide information about the content itself rather than information about the visual styling of the content. It is critical to ensure that assistive technology users can understand your document.

A screen reader is a type of assistive technology that outputs on-screen text using text-to-speech, primarily used by those who are blind.

A speech synthesizer (also known as Text-To-Speech) is a technology that turns written text into speech. It is used by those who are blind as part of a screen reader and as an assistive technology by those who are unable to speak.

Seeing AI is a free assistive application developed by Microsoft to recognize text and objects, primarily used by those who are blind.

This assistive technology is a form of switch system that sends signals through air pressure by having users sip (inhale) or puff (exhale) through a tube, straw or wand.

This assistive technology is a category of alternative navigation where users can use a switch device (a device that has two states - on and off) to navigate a piece of technology (for example, a screen), and is primarily used by those with movement-limiting disabilities.