Ключевые слова: academic, audience, banner, briefing, business, businessman, class, classroom, coaching, conference, congress, convention, corporate, education, educator, event, explaining, faculty, forum, gesturing, group, indoors, information, institute, knowledge, learn, lecture, lecturer, listeners, manager, meeting, participants, people, presentation, professional, public, room, screen, seminar, session, sitting, speaker, speech, study, teacher, teaching, training, workshop,