Blissymbols used herein derived from the symbols described in the work, Semantography, original copyright, C.K. Bliss, 1949. In September, 1982, C.K. Bliss granted an exclusive, non-cancellable and perpetual, world-wide license to the Blissymbolics Communication Institute (now Blissymbolics Communication International), for the application of Blissymbols, for use by handicapped persons and persons having communication, language and learning difficulties.