Is the original method that started since the 18th century and still in use today. All languages are able to convey quickly and is very understanding of the deaf.
How is primordial that began in the 18th century and is still used today. Sign language has the advantage of a quick and meaningful understanding of the deaf with ease.
As a traditional way that began 18 century and is still used today. Sign language can convey the advantages are fast and it is understood of the deaf conveniently.