Ключевые слова: ad, agreement, arm, background, business, button, caucasian, click, clicking, concept, connect, copy, direction, family, female, finger, friend, friendship, gesture, gesturing, hand, human, idea, index, input, interface, isolated, male, man, people, person, point, press, screen, select, selecting, showing, sign, space, success, symbol, tablet, thumb, together, touch, two, visual, white, woman, young,