The Indian Signing System or Indian Sign System (ISS) is a convention for manually coded language used in India. It uses the words (signs) of Indian Sign Language with the word order and grammar of at least six official oral languages of India, including Urdu (Signed Urdu), Hindi (Signed Hindi), Marathi (Signed Marathi), Telugu (Signed Telugu) and Tamil (Signed Tamil).
^a Sign-language names reflect the region of origin. Natural sign languages are not related to the spoken language used in the same region. For example, French Sign Language originated in France, but is not related to French. Conversely, ASL and BSL both originated in English-speaking countries but are not related to each other; ASL however is related to French Sign Language.
^b Denotes the number (if known) of languages within the family. No further information is given on these languages.^c Italics indicate extinct languages.