Ключевые слова: background, banner, blackboard, blank, board, button, chalk, chalkboard, classroom, click, computer, concept, cursor, design, education, email, empty, exchange, finger, gesture, hand, http, icon, information, internet, label, link, mail, message, mouse, net, network, page, pattern, plank, school, schoolroom, sign, signal, symbol, tag, teaching, technique, technology, texture, title, web, write, www,