Ключевые слова: 1819 years, 2024 years, 20s, 2529 years, 4044 years, 40s, african ethnicity, architecture, asian, asian ethnicity, associate, audience, auditorium, black, business, businesswoman, capturing, casual clothing, cellphone, conference, confidence, confident, congress, convention, corporate, demonstrating, education, entertainment, female, global, guest speaker, holding, indoors, large group of people, leader, leadership, lecture, lecturer, male, man, mature adult, mature women, memory, millennial, mixedrace, mixedrace person, occupation, part of, performance, photo, photographing, podium, presentation, professional, public, public speaking, seating, seats, seminar, sitting, smartphone, speaker, spectators, speech, stage, teamwork, theater hall, together, touchscreen, training, video, wireless technology, woman, workshop, young adult, young men, young women,