Signed Exact English is a sign system that matches signs with the English language. It is one of the first English systems to be published. Deaf people who exposed at an early age to this system can learn standard idiomatic English and have learning opportunities like those of hearing children.
American sign language is a complete, complex language that employs signs made by moving the hands combined with facial expression and postures of the body. It is the primary language of many North Americans who are deaf and is one of several communication options used by people who are deaf or hard of hearing.