Ключевые слова: address, at, at sign, at symbol, background, black, blog, blogging, blue, business, commerce, commercial, commercial at, communications, concept, digital, e commerce, e mail, e shopping, electronic, email, horizontal, information, internet, mail, message, microblog, microblogging, network, networking, online, program, server, shopping, sign, social, social network, social networking, society, software, symbol, table, technologies, technology, telecommunications, users, virtual, wooden,