Ключевые слова: academic, audience, briefing, business, businessman, camera, coaching, conference, congress, convention, corporate, education, entrepreneur, event, explaining, group, hall, institute, learn, lecture, listeners, manager, meeting, mentor, participants, participation, people, presentation, professional, public, record, recorder, school, screen, seminar, show, speaker, speaking, speech, study, symposium, talk, teach, teacher, training, university, video, voice, workshop,