Royal Association for Deaf people
（重定向自RADD）
The Royal Association for Deaf people (RAD) is a British charitable organization whose mission is to promote the welfare and interests of Deaf people. It is a Deaf-led organisation.
Using uppercase letter "D" in deaf refers to the group of deaf people who share a language and culture and whose first or preferred language is sign language". Lowercase "d" in deaf refers to the audiological condition of not hearing.