What will happen if there is no Google, Yahoo, Bing or Mozilla?

We need to dig in lot of books to find information needed. We have to go back in time. This might scared all of us ! Actually all the Google, Yahoo, Bing and Mozilla are known as search engines. Fun fact ! Every search engines has their own database !

 So basically I can conclude that:

• Data base is where all the data or indexed web pages where stored.
• User interface is a friendly or common side/app/or page that user uses to find information.
• Web crawler is automated program or bot that crawled in search engines to find the information from the data base.
• Information retrieval system is a system used to match the user's query to indexed web pages found in data based.