Ключевые слова: blackboard, blog, board, business, button, chalk, chalkboard, chat, click, comment, community, computer, concept, connect, connection, contact, cursor, figure, finger, friend, group, hand, help, icon, internet, media, message, multimedia, net, network, news, office, on line, people, plan, public, sign, social, strategy, symbol, team, teamwork, technology, theory, web, www,