Ключевые слова: audience, black, blackboard, business, businessman, chart, class, classroom, conference, consultation, diagram, discussion, graphic, group, human, icon, illustration, job, laptop, lecture, line, management, manager, meeting, office, partnership, people, pictogram, presentation, project, projector, room, seminar, set, sign, speaker, speech, symbol, teacher, team, teamwork, theme, thin, training, tribune, user, video call,