Sohu.com Ltd is engaged in providing of search engines and developing of online games. The company has three operating segments namely Sohu, Sogou, and Changyou segment. Sogou provides Search and Search related business, It includes Sogou Search, Sogou Input Method, Recommendation service, Sogou Browser, Sogou Web Directory, Sogou Translation. Sogou generates revenue primarily from its search and search-related advertising services. Changyou provides games through personal computers and mobile devices, such as mobile phones and tablets, connected to the Internet. Changyou's platform channel business consists primarily of the operation of the 17173.com. Sohu's main business is the brand advertising business. It generates maximum revenue from the Sogou segment.