Ключевые слова: 2, 20, abstract, background, banner, bind, blackboard, blank, blankness, board, border, chalk, chalkboard, classroom, com, communication, computer, concept, design, domain, education, email, exchange, frame, global, homepage, http, information, internet, join, label, lacunae, link, mail, message, namedomain, net, network, node, page, pattern, plank, release, school, schoolroom, sign, swap, symbol, tag, teaching, technique, technology, texture, upgrade, version, web, website, write, www,