Sign systems

internationally recognized means for obtaining help

Makaton is an augmentative and alternative communication (AAC) system which uses signs (hand gestures) and symbols (images) alongside speech and written words to support communication. Despite its use of signs, Makaton is not a sign language.

LoCoS (short for Lovers Communication System) is a pictorial language developed by Yukio Ota of Japan in 1964. It was meant as communication for the deaf and mute as well as for the illiterate. It is a universal and simple language, and as Ota put it, "It should emphasize the importance of communication among all the people of all the countries of the world."

aircraft control by body gesture signaling to pilot

methods used by underwater divers to communicate

sign languages developed privately in a small social group such as families/friends

key concept in semiotics and is used to refer to any system of signs and relations between signs

singing in sign language