WPP is the world's leading communications services group, with billings of $72.3 billion and revenues of $17.3 billion in 2013, providing national, multinational and global clients with advertising; media investment management; data investment management; public relations & public affairs; branding & identity; healthcare communications; and direct, digital, interactive, promotion & specialist communications. WPP's worldwide companies include JWT, Ogilvy & Mather, Y&R, Grey Group, United Network, GroupM, Mindshare, MEC, MediaCom, Maxus, Kantar (including Millward Brown and TNS), Burson-Marsteller, Hill+Knowlton Strategies, Cohn & Wolfe, RLM Finsbury, Ogilvy Public Relations, Landor, Brand Union, Fitch, Sudler & Hennessey, Ogilvy CommonHealth Worldwide, ghg, AKQA, OgilvyOne, Wunderman and WPP Digital, among others. WPP companies provide communications services to clients worldwide, including 350 of the Fortune Global 500; all 30 of the Dow Jones 30; 63 of the NASDAQ 100; and 31 of the Fortune e-50. Collectively, WPP employs 179,000 people (including associates) in more than 3,000 offices in 111 countries.