Ключевые слова: approval, background, body, body language, communicate, communication, connection, consultant, conversation, corporate, customer, deaf, different, educational, emotion, expression, finger, friendship, gesture, gestures, gesturing, hand, hand signal, handicap, health, help, impaired, impairment, international, interpretation, interpreter, language, manual, marketing, professional, service, shake, sign, sign language, speaking, speech, support, symbol, talk, teacher, telemarketing, translation, translator, understanding, words,