Ключевые слова: at, audience, business, career, chair, class, classroom, college, computer, conceptual, conference, congress, convention, corporation, create, discussion, education, event, follow, forum, group, hall, handheld, idea, indoor, instruction, lcd, learn, learning, lecturing, lesson, listening, man, meeting, mob, notebook, office, person, personnel, presentation, professional, school, speaker, speaking, student, success, teacher, technology, training,