Ключевые слова: anonymous, audience, auditorium, back view, briefing, business, businesspeople, community, conference, contemporary, corporate, course, creative, development, digital, discuss, economy, education, entrepreneur, event, faceless, financial, forum, group, hall, horizontal, indoors, learn, lecture, lesson, listen, meeting, modern, occupation, online, participant, participate, presentation, professional, public, rear, remote, screen, seat, seminar, session, speaker, speech, strategy, unrecognizable,