BLISPHON is a multilingual integrated system, with synthetic speech output, for the augmentative or alternative communication of the speechless or w ith communication problems individual. It is based on Blissymbolics: a well established international, pictographic and ideographic symbol system. BLISPHON has been designed and developed using advanced human-computer interaction techniques in order to p rovide flexibility and adaptability to the specific requirements of the disabled individual. The user can choose from different possible methods and devices for pointing or selecting symbols and for constructing a dialog. A language dependent parser is used for Bliss-to-text conversion. The output of the system can drive a variety of text-to-speech converters. Furthermore, BLISPHON incorporates a powerful educational environment to learn Blissymbolics.