A sign language, now extinct, which developed on Martha's Vineyard (an island in Massachusetts).

A sign language used in South Africa.

A specialized vocabulary (perhaps not strictly a language) used in Haiti for religion, song, and dance purposes.

A sign language used in Yucatán, Mexico.

Maritime Sign Language

A sign language used in Hawaii. The language is named after the Hawaiian Pidgin spoken language and is not itself a pidgin.

The primary sign language of Liechtenstein and German-speaking areas of Switzerland.

(computing) An extension of XHTML, designed to allow both humans and machines to find resources associated with a given namespace.

(computing) a procedural programming language of the CCITT designed for use in telecommunication switches and still in use for legacy systems in some telecommunication companies and for signal box programming.

Swiss-German Sign Language