Time Warner Inc's AOL said on Tuesday it has purchased Web contextual display company Sphere Source Inc as part of a move to expand its Internet and advertising portfolio.
Sphere, founded in 2005 as a blog search engine, develops Web technology that displays articles, videos and blog entries next to other related content on Web sites. Its technology is used by over 50,000 sites, including those of media organisations CNN, Reuters, Newsweek and CBS.