Possible Clues:

• Comm. system in the film "CODA"
• It's used at Gallaudet U.
• Syst. with hand gestures
• Communication sys. at Gallaudet
• Handy communication syst.?
• "The Joy of Signing" subj
• Manual alphabet, briefly
• Language at Gallaudet
• Syst. of unspoken words
• Digital communication, for short?