The search engine industry has entered the era of Specialization

It seems that the search engine has entered the era of specialization.
Early search engines in China, such as searchers (maybe not heard of by many people) and Polaris (now it looks too much), etc, generally, it is a simple search for some sites that manually join the database. Later, as web spiders crawl everywhere, the number of web pages to search is growing and the quality is getting higher and higher. Then, you can search for other types of files, such as movies, music, Flash, PPT, and Doc.
Today, we should say that the search engine has begun to develop in a professional direction. Google launched a specialized academic search engine http://scholar.google.com in the first few days. 8848.com once disappeared and came back. It launched a professional shopping search engine. Koders Inc recently launched its own Source codeSearch engine http://www.koders.com. Presumably many companies or research institutes are also developing their own professional search engines, such as developing medical search engines, tourism search engines, and talent search engines.
It is not difficult to see the development direction of the search engine industry in the next few years-specialization.