Ключевые слова: abstract, background, banner, bind, blackboard, blank, blankness, board, chalk, chalkboard, classroom, communication, computer, concept, design, e, education, email, exchange, flat, glass, global, homepage, information, internet, join, label, lacunae, link, mail, message, net, network, pattern, plank, school, schoolroom, sign, swap, symbol, tag, teaching, technique, technology, texture, web, write, www,