Ключевые слова: abstract, background, blackboard, blur, blurred, blurry, bokeh, boy, cell, chairs, choice, class, classroom, colorful, concept, conference, connect, connection, contact, corporate, education, entertainment, group, hall, holding, interior, internet, learning, mobile, people, phone, play, room, school, services, student, study, table, teacher, technology, white, wood, wooden, young,