Answer:

asl

Answer	Crossword Clue
ASL	Communication for the deaf: Abbr.
ASL	Syst. with hand signals
ASL	Digital lang.

ASL	Discourse at Gallaudet
ASL	Handy talk? (abbr.)
ASL	Digitized speech? (abbr.)
ASL	Nonspoken comm.
ASL	Soundless form of comm.
ASL	Hand communication (abbr.)
ASL	Manual medium, briefly
ASL	Silently spoken comm.

ASL	Handy way of talking? (abbr.)
ASL	Hands-on approach to lang.?
ASL	Silent communication, briefly
ASL	How Gallaudet University students converse: Abbr.
ASL	Communication syst.
ASL	Handmade syst.?
ASL	Handy form of communication?: Abbr.
ASL	Some unspoken communication: Abbr.

ASL	Syst. of unwritten words
ASL	It's used at Gallaudet U.
ASL	Communications syst. for handy people?
ASL	Manual transmissions?: Abbr.
ASL	Comm. method reputedly used by Koko the gorilla
ASL	Communication syst. with hand signals
ASL	Visual communication?: Abbr.
ASL	Digital comm. method

ASL	Nonverbal syst.
ASL	Comm. for the hearing-impaired
ASL	Digital comm. method?
ASL	Handy communication syst.?
ASL	Silent communication syst.
ASL	Talking with one's hands?: Abbr.
ASL	Communication at Gallaudet U.
ASL	Hand-y communication syst.?

ASL	Subj. taught in silence
ASL	Communication no one hears: Abbr.
ASL	Communication syst. for the deaf
ASL	Lip-reading alternative: Abbr.
ASL	Lip-reading alternative (abbr.)