Ключевые слова: abstract, add, advertising, b2b, black, blackboard, blog, blogging, business, businessman, chalk, chalkboard, communication, community, company, concept, connect, connection, contact, definition, email, finger, friend, future, global, group, hand, icon, identity, interaction, internet, like, mail, marketing, media, message, network, networking, online, services, social, technology, text, title, together, touch, web,