Ключевые слова: 3d rendering, blackboard, board, business, businessman, chalkboard, communication, course, cyberspace, distance, drawing, drawn, e learning, education, elearning, hand, handdrawn, information, interactive, interior, internet, learning, lesson, man, manuscript, modern, multimedia, office, online, presentation, school, seminar, sketch, student, study, suit, tech, technology, thinking, training, tutorial, wall, watching, web, website, workplace, workspace,