Accessibility is a term used to describe the degree to which something, such as a website, building, or product, can be used by people with disabilities or impairments.

An artificial heart valve is a one-way valve implanted into a person's heart to replace a heart valve that is not functioning properly (valvular heart disease).

Assistive Technology for the Deaf and Hard of Hearing is technology built to assist those who are deaf or suffer from hearing loss.

Augmentative and alternative communication (AAC) encompasses the communication methods used to supplement or replace speech or writing for those with impairments in the production or comprehension of spoken or written language.

Braille is a tactile writing system developed by Louis Braille in the early 19th century.

A congenital disorder, also known as a birth defect, is a medical condition that is present at or before birth.

Disability is defined as any physical, cognitive, sensory, or mental impairment that affects a person's ability to perform tasks or participate fully in society.

Ethics is a branch of philosophy that studies moral principles and the application of these principles to guide human behavior.