Sign language 30 American Sign Language 8 Pattern recognition systems 8 Infants 6 Interpersonal communication in infants 6 Language 6 Nonverbal communication in infants 6 Translating 6 Interpreters (Computer programs) 5 Motion detectors 4 American sign language 3 Deaf 2 Digital techniques 2 Image processing 2 Interpreters for the deaf 2 Means of communication 2 Neural networks (Computer science) 2 Nonverbal communication in children 2 Nonverbal communication ti infants 2 Self-instruction 2 Sign Language 2 Study and teaching (Higher) 2 System design 2 Teachers of the deaf 2 Training of 2 Universals (Linguistics) 2 World Wide Web 2 learn sign language 2 manual alphabet 2 Comparative linguistics 1