Sign languages are languages that use the visual-manual modality to convey meaning rather than spoken words. They are expressed through manual articulation in combination with non-manual markers, and
People using American Sign Language
Juan Pablo Bonet, Reducción de las letras y arte para enseñar a hablar a los mudos ("Reduction of letters and art for teaching mute people to speak") (Madrid, 1620)
Chirogram from John Bulwer's Chirologia, 1644
Sign language relief sculpture on a stone wall: "Life is beautiful, be happy and love each other", by Czech sculptor Zuzana Čížková on Holečkova Street in Prague-Smíchov, by a school for the deaf
American Sign Language is a natural language that serves as the predominant sign language of deaf communities in the United States and most of Anglophone Canada. ASL is a complete and organized visual
Sign language
…though, sign languages are independent of spoken languages and follow their own paths of development. For example, British Sign Language (BSL) and American Sign Language (ASL) are quite different and mutually unintelligible, even though the hearing people of the United Kingdom and the United States share the same spoken…
A sign language interpreter at a presentation
American Sign Language Convention of March 2008 in Austin, Texas
Phonemic handshape /2/ [+ closed thumb]
Phonemic handshape /3/ [− closed thumb]