Sohu.com Inc. (Sohu) is an online media, search and game service company providing online products and services on personal computers (PCs) and mobile devices in the People's Republic of China (the PRC). The Company operates through three segments: the Sohu segment; the Sogou segment, and the Changyou segment. Sogou is an online search, client software and mobile Internet product provider in China. Changyou is an online game developer and operator in China as measured by its MMOG Tian Long Ba Bu (TLBB) and its mobile game TLBB three-dimensional (TLBB 3D), and engages primarily in the development, operation and licensing of online games for PCs and mobile devices. The Sohu segment's main business is the brand advertising business, which offers to users, over its matrices of Chinese language online media, various content, products and services across multiple Internet-enabled devices.